March 2010 - ffmpeg-user - lists.ffmpeg.org

Encoding while capturing fails
by jpriebe＠cbcnewmedia.com 25 Mar '10

25 Mar '10

> So..how can I tail two files to ffmpeg? > > Why I don't want to use named pipes? > It doesn't work with two files(Audio and Video). It works with one file Audio > or Video. > The capture doesn't starts.But this has something to do with my capturing > software. I think you're going to have to use named pipes. I can understand the problem you're seeing with your capture program -- my guess is that you're deadlocking -- the writer (your capture program) is trying to write to the video pipe while the reader (ffmpeg) is trying to read from the audio pipe. There is no data to read, so the reader hangs, and since nobody is consuming from the video pipe, the writer hangs as well. I have worked around this by having my capture program write to files, and having two other independent processes that consume those files and feed them to named pipes. If you are writing your own capture program, you could probably do this more elegantly with multi-threaded writing (one thread for audio and one for video). > So I gave up handling with named pipes. And the other problem is > that I can't access succesfully to the named pipes with differnt applications > at the sametime.Many Datapackets loss. This is because of the huge data > amount(uncompressed 20-40mb/s). With the right hardware, you should be able to move MUCH more data than this. In my solution, I'm capturing live HD video at nearly 1Gbps, writing it raw to files on a RAM disk, reading them in, and then writing them back out to the named pipes. I can even do this with two different HD video sources simultaneously on the same machine. Admittedly, I'm using a newly built Intel Core i7 system to do this, but this gives you an idea of what is possible. Jason Priebe CBC New Media Group

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Using sameq
by vpredoehl＠gmail.com 25 Mar '10

25 Mar '10

I want to try using -sameq with libx264. I'm getting pretty good at judging the bit rate, but I want to experiment with sameq. So far, the resulting bit rates are way too low. So what's the correct way to use sameq for two pass encoding? -- Vincent

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Bus Error
by vpredoehl＠gmail.com 25 Mar '10

25 Mar '10

I got a bus error on this one: The input file is h264 / AAC, so it may be a libx264 problem, but I also encountered the BE with mpeg4. I'm not sure how to get more info to help debug, but I am willing to help if I can. I have updated to the latest from the svn repo. Mac-Mini:Stargate Atlantis vpredoehl$ ffmpeg -threads 2 -i Stargate\ Atlantis\ \[02x01\]\ -\ Siege\ $\ Part\ 3$.mov -vcodec libx264 - pass 1 -vpre default -vpre custom -b 700k -r 23.98 -an 'Stargate Atlantis [02x01] - Siege III.mp4' FFmpeg version SVN-r22664, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 24 2010 20:13:40 with gcc 4.0.1 (Apple Inc. build 5465) configuration: --enable-pthreads --enable-libfaac --enable-libfaad --enable-libx264 --enable-gpl --enable-nonfree libavutil 50.12. 0 / 50.12. 0 libavcodec 52.60. 0 / 52.60. 0 libavformat 52.57. 1 / 52.57. 1 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 Seems stream 1 codec frame rate differs from container frame rate: 1200.00 (1200/1) -> 23.92 (287/12) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Stargate Atlantis [02x01] - Siege ( Part 3).mov': Metadata: major_brand : qt minor_version : 537199360 compatible_brands: qt Duration: 00:42:09.81, start: 0.000000, bitrate: 1077 kb/s Stream #0.0(eng): Audio: aac, 44100 Hz, stereo, s16, 105 kb/s Stream #0.1(eng): Video: h264, yuv420p, 640x352, 967 kb/s, 23.98 fps, 23.92 tbr, 600 tbn, 1200 tbc File 'Stargate Atlantis [02x01] - Siege III.mp4' already exists. Overwrite ? [y/N] y [libx264 @ 0x1003600]using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 [libx264 @ 0x1003600]profile High, level 3.0 Output #0, mp4, to 'Stargate Atlantis [02x01] - Siege III.mp4': Metadata: encoder : Lavf52.57.1 Stream #0.0(eng): Video: libx264, yuv420p, 640x352, q=5-51, pass 1, 700 kb/s, 1199 tbn, 23.98 tbc Stream mapping: Stream #0.1 -> #0.0 Press [q] to stop encoding Bus error Mac-Mini:Stargate Atlantis vpredoehl$

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Samma mxf Mjpeg2000
by bouke＠editb.nl 23 Mar '10

23 Mar '10

I have a bunch of Mjpeg2000 files in a MXF container, created by a Samma recorder (Front Porch Digital), and can't get FFmpeg to read them. Is there anything i could have missed, or is it so ancient that it is and never will be supported? Other options to transcode them into something usable? Thanks, Bouke VideoToolShed van Oldenbarneveltstraat 33 6512 AS NIJMEGEN The Netherlands +31 24 3553311 www.videotoolshed.com For large files: http://dropbox.yousendit.com/BoukeVahl998172

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Record audio Desktop with ffmpeg
by hizo＠free.fr 23 Mar '10

23 Mar '10

Hi, I creating a mini soft for screencast (audio + video) with ffmpeg. For the video, it's ok. For the sound, the capture of sound of my webcam (/dev/dsp1) it's ok. [code]ffmpeg -f oss -ar 44100 -i /dev/dsp1 -acodec mp2 -ab 128k test.mp3[/code] But for my audio desktop : [code]ffmpeg -f oss -ar 44100 -i /dev/dsp -acodec mp2 -ab 128k test.mp3[/code] The file is empty... I have make many test but... (find on internet) [code]ffmpeg -f oss -ar 44100 -ac 1 -i /dev/dsp -acodec pcm_s16le mumuv-050- mono.wav[/code] [code]ffmpeg -f oss -ar 44100 -ac 1 -i /dev/audio -acodec pcm_s16le mumuv-050- mono.wav[/code] nothing works... Other test with multi soft : [code]sox -t alsa "hw:0,0" -t ogg -A -2 -c1 -r11025 - | ffmpeg -y -i - -ar 11025 -ab 52 -ac 1 -f x11grab -s 800x600 -i :0.0+10,20 -b 200 -r 12 -aspect 4:3 -f flv test.flv[/code] [code]arecord -D hw:42 -f S16_LE -r 12345 -c 2 > file.wav[/code] [code]arecord --quiet --file-type wav --rate=44000 > test.wav[/code] Test with alsa... : [code]ffmpeg -f alsa -r 16000 -i hw:2,0 -acodec libmp3lame -ab 96k output.avi FFmpeg version SVN-r19468, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' -- libdir='${prefix}/lib' --shlibdir='${prefix}/lib' --bindir='${prefix}/bin' -- incdir='${prefix}/include/ffmpeg' --enable-shared --enable-libmp3lame --enable- gpl --enable-libfaad --mandir='${prefix}/share/man' --enable-libvorbis -- enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable- x11grab --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libtheora --enable-libdc1394 --enable-libspeex -- enable-nonfree --disable-stripping --enable-avfilter --enable-libdirac -- disable-decoder=libdirac --enable-libschroedinger --disable- encoder=libschroedinger --enable-avfilter-lavf --enable-libopenjpeg --enable- version3 --disable-altivec --disable-armv5te --disable-armv6 --disable-vis libavutil 50. 3. 0 / 50. 3. 0 libavcodec 52.32. 0 / 52.32. 0 libavformat 52.36. 0 / 52.36. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 0. 5. 0 / 0. 5. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Nov 16 2009 20:16:27, gcc: 4.4.1 Unknown input or output format: alsa[/code] don't work again... Does anybody know how I can do? Thank's and sorry+++ for my English.

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problems with FFmpeg and Video2Linux2
by mrdunk＠gmail.com 23 Mar '10

23 Mar '10

hi ffmpeg Guys and Girls, apologies if this is a known issue. from searching there appears to be a lot of similar issues out there but most of them are on very dated package versions. i believe i have an issue getting FFmpeg to read a Video4Linux2 device. i am trying to get a Logitech Quickcam Express working with FFmpeg under Ubuntu 9.10 (Karmic) on an IBM T41p ThinkPad. it is a fairly clean install of Ubuntu having been re-installed a few weeks back. duncan at lapdancer:~$ uname -a Linux lapdancer 2.6.31-20-generic #57-Ubuntu SMP Mon Feb 8 09:05:19 UTC 2010 i686 GNU/Linux duncan at lapdancer:~$ lsusb |grep QuickCam Bus 003 Device 008: ID 046d:0928 Logitech, Inc. QuickCam Express duncan at lapdancer:~$ lsmod | grep -iE "(gspca|v4l)" gspca_spca561 9372 0 gspca_main 22812 1 gspca_spca561 videodev 36736 1 gspca_main v4l1_compat 14336 1 videodev duncan at lapdancer:/tmp$ v4l-info ### v4l2 device info [/dev/video0] ### general info VIDIOC_QUERYCAP driver : "spca561" card : "Camera" bus_info : "usb-0000:00:1d.1-1" version : 2.6.0 capabilities : 0x5000001 [VIDEO_CAPTURE,READWRITE,STREAMING] [....etc....] [truncated to save space] the webcam works in xawtv as can be seen above the camera is playing properly with v4l. interestingly when i use gstreamer-properties to view an image, v4l displays a faintly readable image with lots of green in it. v4l2 displays the image correctly. so from this i am presuming v4l2 is working correctly with my camera. i am also presuming the spca561 webcam driver is working correctly. (i believe the qc-usb will also work with this camera but ithis is one of the few things i have not tried yet.) now on to my problem.... FFmpeg works if i use it on files. i can dump raw data from my webcam using "-f rawvideo". my webcam defaults to 352x288 resolution. i believe 20fps is the correct frame rate (but i have tried everything from 1 to 50). duncan at lapdancer:~$ ffmpeg -y -f video4linux2 -r 20 -s 352x288 -i /dev/video0 test.avi FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5+svn20090706/debian/include --enable-shared --disable-static libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 0 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Oct 13 2009 22:15:16, gcc: 4.4.1 [video4linux2 @ 0x91972c0][3]Capabilities: 5000001 [video4linux2 @ 0x91972c0]Cannot find a proper format. /dev/video0: I/O error occurred Usually that means that input file is truncated and/or corrupt i have tried a few versions of FFmpeg in the hope i could find one with the correct support built in. i tried this post http://ubuntuforums.org/showthread.php?t=325963 which described "How To: get ffmpeg with all the options enabled". i also tried building my own from SVN with any option i thought might make a difference switched on. at this point i've been reduced to "trying stuff" rather than logical problem solving. can anyone give me any pointers as to what direction to go next? dunk.

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resize work as crop with -enable-avfilter
by alexeybbb＠gmail.com 23 Mar '10

23 Mar '10

Hellow, I have ffmepg with -enable-avfilter. This command work good: ffmpeg -i in.flv -s 100x100 out.flv And this command good: ffmpeg -i in.flv -cropleft 0 -cropright 0 -croptop 7 -cropbottom 7 out.flv But this don't work correctly ffmpeg -i in.flv -s 100x100 -cropleft 0 -cropright 0 -croptop 7 -cropbottom 7 out.flv resize starts work as crop. FFmpeg version SVN-r22626, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 22 2010 14:46:23 with gcc 4.4.0 configuration: --enable-libx264 --enable-gpl --enable-memalign-hack --enable-a vfilter --enable-avfilter-lavf --enable-libmp3lame --enable-zlib --enable-encoder=png libavutil 50.12. 0 / 50.12. 0 libavcodec 52.59. 0 / 52.59. 0 libavformat 52.56. 1 / 52.56. 1 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.18. 0 / 1.18. 0 libswscale 0.10. 0 / 0.10. 0 How to resolve this problem? Alex.

2 2

Record audio Desktop with ffmpeg
by hizo＠free.fr 22 Mar '10

22 Mar '10

Hi, I creating a mini soft for screencast (audio + video) with ffmpeg. For the video, it's ok. For the sound, the capture of sound of my webcam (/dev/dsp1) it's ok. [code]ffmpeg -f oss -ar 44100 -i /dev/dsp1 -acodec mp2 -ab 128k test.mp3[/code] But for my audio desktop : [code]ffmpeg -f oss -ar 44100 -i /dev/dsp -acodec mp2 -ab 128k test.mp3[/code] The file is empty... I have make many test but... (find on internet) [code]ffmpeg -f oss -ar 44100 -ac 1 -i /dev/dsp -acodec pcm_s16le mumuv-050- mono.wav[/code] [code]ffmpeg -f oss -ar 44100 -ac 1 -i /dev/audio -acodec pcm_s16le mumuv-050- mono.wav[/code] nothing works... Other test with multi soft : [code]sox -t alsa "hw:0,0" -t ogg -A -2 -c1 -r11025 - | ffmpeg -y -i - -ar 11025 -ab 52 -ac 1 -f x11grab -s 800x600 -i :0.0+10,20 -b 200 -r 12 -aspect 4:3 -f flv test.flv[/code] [code]arecord -D hw:42 -f S16_LE -r 12345 -c 2 > file.wav[/code] [code]arecord --quiet --file-type wav --rate=44000 > test.wav[/code] Test with alsa... : [code]ffmpeg -f alsa -r 16000 -i hw:2,0 -acodec libmp3lame -ab 96k output.avi FFmpeg version SVN-r19468, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' -- libdir='${prefix}/lib' --shlibdir='${prefix}/lib' --bindir='${prefix}/bin' -- incdir='${prefix}/include/ffmpeg' --enable-shared --enable-libmp3lame --enable- gpl --enable-libfaad --mandir='${prefix}/share/man' --enable-libvorbis -- enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable- x11grab --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libtheora --enable-libdc1394 --enable-libspeex -- enable-nonfree --disable-stripping --enable-avfilter --enable-libdirac -- disable-decoder=libdirac --enable-libschroedinger --disable- encoder=libschroedinger --enable-avfilter-lavf --enable-libopenjpeg --enable- version3 --disable-altivec --disable-armv5te --disable-armv6 --disable-vis libavutil 50. 3. 0 / 50. 3. 0 libavcodec 52.32. 0 / 52.32. 0 libavformat 52.36. 0 / 52.36. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 0. 5. 0 / 0. 5. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Nov 16 2009 20:16:27, gcc: 4.4.1 Unknown input or output format: alsa[/code] don't work again... Does anybody know how I can do? Thank's and sorry+++ for my English.

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where to find CODEC details?
by heeeba2010＠yahoo.com 22 Mar '10

22 Mar '10

Hi All I want to know all details about the running Movie file such as its resolution, A/V codecs, frame rate, ... where is this data are stored, i mean which structure store vlaues of these details ? say i run XviD movie then ffmpeg should recognize some where in its code that "this is XviD Movie" i want to know where is this part in the code? and how i find similar parts? -------------------- BEST REGARD Heba

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Fwd: resize work as crop
by alexeybbb＠gmail.com 22 Mar '10

22 Mar '10

---------- Forwarded message ---------- From: Alex B <alexeybbb at gmail.com> Date: 2010/3/22 Subject: resize work as crop To: ffmpeg-user-request at mplayerhq.hu Hellow, I have ffmepg with -enable-avfilter. This command work good: ffmpeg -i in.flv -s 100x100 out.flv And this command good: ffmpeg -i in.flv -cropleft 0 -cropright 0 -croptop 7 -cropbottom 7 out.flv But this don't work correctly ffmpeg -i in.flv -s 100x100 -cropleft 0 -cropright 0 -croptop 7 -cropbottom 7 out.flv resize starts work as crop. FFmpeg version SVN-r22626, Copyright (c) 2000-2010 the FFmpeg developers ?built on Mar 22 2010 14:46:23 with gcc 4.4.0 ?configuration: --enable-libx264 --enable-gpl --enable-memalign-hack --enable-a vfilter --enable-avfilter-lavf --enable-libmp3lame --enable-zlib --enable-encoder=png ?libavutil ? ? 50.12. 0 / 50.12. 0 ?libavcodec ? ?52.59. 0 / 52.59. 0 ?libavformat ? 52.56. 1 / 52.56. 1 ?libavdevice ? 52. 2. 0 / 52. 2. 0 ?libavfilter ? ?1.18. 0 / ?1.18. 0 ?libswscale ? ? 0.10. 0 / ?0.10. 0 How to resolve this problem? Alex.

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How to start streaming
by mlahiani＠dane-elec.co.il 22 Mar '10

22 Mar '10

Hello I have a cross platform client and a server applications. The client ask the server to open media file (at client machine) the following is happen: 1) Server start sending to client chunks of 1KB from the file 2) The client create a local file in the temp and write those chunks to it. (downloading) 3) Write now when finish to downloading the file the client open it with the default application I want to change step 3 as follow open the file after X%(let say 50%) of the file is download, continue downloading to the file while it play. What I want is that the file will play also the 51-100% of data. More than that I want to build media player (using QT and Phonon) and let my media player to play the media file. 1) What I need to install for start developing? 2) Do I need to install something in the client machine? 3) Is it possible to stream that way? 4) How do I stream? Where to run the server and where the client? and how to configure them? 5) Is it possible to play the video/audio files in my player? How I tell ffmpeg where to send the data? 6) How to start????? Any example? Tutorial? Thanks a lot Moti Lahiani Dane-Elec R & D Israel Tel: +972 522 702 503 Email: mlahiani at dane-elec.co.il <http://www.my-ditto.com/>

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DCA 5.1 audio channels remapped incorrectly to output file
by psistormyamato＠lavabit.com 21 Mar '10

21 Mar '10

(I'm using the Ubuntu ffmpeg package, but I didn't see anything relevant in the changelog.) I've been trying to transcode from a video that contains 5.1 dca audio, but the output audio has its channels incorrectly mapped. Is there any way that I can correct this? When transcoding the source into 5.1 ac3, the left-front channel seems to be playing a surround channel. When transcoding the source into stereo ac3, the left-front channel seems to have been assigned the center channel from the source audio, but it definitely isn't front-left. ### Converting to stereo ### $ ffmpeg -i "The Hurt Locker.mkv" -target ntsc-dvd -ss "00:31:30" -t "00:00:30" -ac 2 SourceSample.mpg FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5 +svn20090706/debian/include --enable-shared --disable-static libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 0 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Oct 13 2009 22:15:16, gcc: 4.4.1 Seems stream 0 codec frame rate differs from container frame rate: 47.95 (48000/1001) -> 24.00 (24/1) Input #0, matroska, from 'The Hurt Locker.mkv': Duration: 02:10:45.85, start: 0.000000, bitrate: N/A Stream #0.0(eng): Video: h264, yuv420p, 1280x688, PAR 172:173 DAR 320:173, 24 tbr, 1k tbn, 47.95 tbc Stream #0.1: Audio: dca, 48000 Hz, 5.1, s16 Output #0, dvd, to 'SourceSample.mpg': Stream #0.0(eng): Video: mpeg2video, yuv420p, 720x480 [PAR 201:163 DAR 603:326], q=2-31, 6000 kb/s, 90k tbn, 29.97 tbc Stream #0.1: Audio: ac3, 48000 Hz, stereo, s16, 448 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding frame= 902 fps= 1 q=2.6 Lsize= 24202kB time=30.06 bitrate=6594.8kbits/s ts/s video:22039kB audio:1648kB global headers:0kB muxing overhead 2.173043% ### ### ### Converting to 5.1 ### $ ffmpeg -i "The Hurt Locker.mkv" -target ntsc-dvd -ss "00:31:30" -t "00:00:30" SourceSample.mpg FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5 +svn20090706/debian/include --enable-shared --disable-static libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 0 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Oct 13 2009 22:15:16, gcc: 4.4.1 Seems stream 0 codec frame rate differs from container frame rate: 47.95 (48000/1001) -> 24.00 (24/1) Input #0, matroska, from 'The Hurt Locker.mkv': Duration: 02:10:45.85, start: 0.000000, bitrate: N/A Stream #0.0(eng): Video: h264, yuv420p, 1280x688, PAR 172:173 DAR 320:173, 24 tbr, 1k tbn, 47.95 tbc Stream #0.1: Audio: dca, 48000 Hz, 5.1, s16 Output #0, dvd, to 'SourceSample.mpg': Stream #0.0(eng): Video: mpeg2video, yuv420p, 720x480 [PAR 201:163 DAR 603:326], q=2-31, 6000 kb/s, 90k tbn, 29.97 tbc Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 448 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding frame= 902 fps= 1 q=2.6 Lsize= 24202kB time=30.06 bitrate=6594.8kbits/s ts/s video:22039kB audio:1648kB global headers:0kB muxing overhead 2.173043% ### ###

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Encoding while capturing fails
by mymurat＠yahoo.com 21 Mar '10

21 Mar '10

Hello, I'm using ffmpeg on ubuntu for two weeks now and I'm amazed of how good it works. Especially with pipes and named pipes it's really nice to play. My question: I'm capturing uncompressed audio and video (both raw and seperate) on a server. After 2,4 or 6 seconds of starting the capture I want ffmpeg to start encoding the capturing(audio and video) on another workstation. ( I want many workstations encoding the same file to different formats while it's beeing captured :)) The problem now is, that ffmpeg is too fast for this situation. The end of file is reached before capturing ends. ffmpeg aborts encoding. Is there a way to tell ffmpeg not to abort encoding until someone manually stops ffmpeg? Or is there another way? Perhaps there it's possible to force ffmpeg to encode in realtime even if it could do much faster!? I don't want to use pipes or named pipes. There are some reasons for me not to use pipes . For me it's important to encode a file which is getting larger and larger and with a delay of max. 10 seconds. Any help? Thanks for reading my post ;) __________________________________________________ Do You Yahoo!? Sie sind Spam leid? Yahoo! Mail verf?gt ?ber einen herausragenden Schutz gegen Massenmails. http://mail.yahoo.com

2 2

releasing zombie picture / audio out of sync
by dagershman＠dagertech.net 21 Mar '10

21 Mar '10

After ripping a DVD, I have a .vob file and mplayer views it just fine. On this particular DVD though, when I run ffmpeg to convert to iPod format: /usr/bin/ffmpeg -i src.vob -b 576k -s 480x320 \ -vcodec mpeg4 -ab 160k -ac 2 \ -ar 48000 -acodec libfaac dest.mp4 I get the following: [mpeg2video @ 0xb7e1a2f0]releasing zombie picture multiple times and then conversion continues fine. However, when I play the resulting .mp4, the video starts with a black screen while the audio starts. Then the video seems to start with what it should but by that time, the audio/video is now out of sync. Ideas? Thanks! --David

1 0

ffmpeg nightly snapshots
by martyj19＠comcast.net 20 Mar '10

20 Mar '10

The last ffmpeg nightly snapshot is dated 2010-Mar-02 coincident with the release of 0.5.1. Was it intended to discontinue these, or is something about generating them broken? MPlayer snapshots are happening.

1 0

Optimising for output on a PAL tv...
by padraig_hogan＠yahoo.com 19 Mar '10

19 Mar '10

Hi, My creative zen has a tv-out that plays?most?videos that with all kinds of resolution and frame-rate on my tv fine.?Some videos won't play so I have to re-encode those?ones anyway and I just stick with their original resolution. But would it be better to have the movies scaled,? interlaced, matched to 25fps etc. done already on the pc rather than having to be done?on-the-fly by the creative zen? The player doesn't ever have difficulties with, but it's hard for me to see how it can be doing all that?"averaging" of pixels and frame-rates etc.?on the fly. Would it look significantly better if I started scaling it etc. beforehand???

1 0

AVI Interleaving Problem
by Patrick.Baghdassarian＠fox.com 19 Mar '10

19 Mar '10

I'm attempting to create an AVI file using raw audio and video frames captured with a Blackmagic Declink Studio card. The captured frames are written to video.raw and audio.raw and encoded using the following command line: ffmpeg -t 3 -r 30000/1001 -f rawvideo -pix_fmt uyvy422 -s 720x486 -i video.raw -f s16le -acodec pcm_s16le -ar 48000 -ac 2 -i audio.raw -f avi -vcodec rawvideo -pix_fmt yuv420p -acodec pcm_s16le -ar 48000 -ac 2 -y capture.avi FFmpeg version SVN-r22144-snapshot, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 4 2010 16:35:02 with gcc 4.4.1 [gcc-4_4-branch revision 150839] configuration: libavutil 50. 9. 0 / 50. 9. 0 libavcodec 52.55. 0 / 52.55. 0 libavformat 52.54. 0 / 52.54. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 [rawvideo @ 0x8ba73a0]Estimating duration from bitrate, this may be inaccurate Input #0, rawvideo, from 'video.raw': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0.0: Video: rawvideo, uyvy422, 720x486, 29.97 tbr, 29.97 tbn, 29.97 tbc [s16le @ 0x8bb0a20]Estimating duration from bitrate, this may be inaccurate Input #1, s16le, from 'audio.raw': Duration: N/A, start: 0.000000, bitrate: N/A Stream #1.0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Output #0, avi, to 'capture.avi': Metadata: ISFT : Lavf52.54.0 Stream #0.0: Video: rawvideo, yuv420p, 720x486, q=2-31, 200 kb/s, 29.97 tbn, 29.97 tbc Stream #0.1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #1.0 -> #0.1 Press [q] to stop encoding frame= 90 fps= 0 q=0.0 Lsize= 46711kB time=3.00 bitrate=127425.1kbits/s The problem I'm experiencing is that any AVI that is longer than 3 seconds produces a "Badly interleaved AVI file detected" message when played back with mplayer. Am I missing a step in the encoding process or is this an mplayer problem? Thanks, Patrick

1 0

Problems remuxing asf (dvr-ms) to vob/dvd
by dennis.volodomanov＠conceiva.com 19 Mar '10

19 Mar '10

Hello all, I'm trying to remux a file from ASF to VOB or DVD, but I get the non monotone timestamps issue no matter what I try. Does anyone know what I can do to make it work? Thanks in advance for your help! FFmpeg's output: ffmpeg.exe -i "LOST_W~1.DVR" -y -vcodec copy -s 704x480 -acodec copy -scodec copy -f dvd -threads 2 -copyinkf -sc_threshold 1000000000 "out.mpg" FFmpeg version SVN-r22593, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 19 2010 10:39:26 with gcc 4.4.0 configuration: --enable-static --disable-shared --enable-memalign-hack -- enable-libmp3lame --extra-cflags=-I/c/msys/local/include --extra-ldflags=- L/c/msys/local/lib --enable-zlib --enable-w32threads --extra-cflags=-fno- common --enable-gpl --enable-libx264 --enable-runtime-cpudetect libavutil 50.12. 0 / 50.12. 0 libavcodec 52.59. 0 / 52.59. 0 libavformat 52.56. 0 / 52.56. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 [mpeg2video @ 011f2fa0]slice below image (30 >= 30) [asf @011e84e0] MAX_READ_SIZE:5000000 reached Input #0, asf, from 'LOST_W~1.DVR': Metadata: DVR Index Granularity: 500 WM/SubTitle : Recon WM/SubTitleDescription: Locke assigns Sawyer a mission. WM/Genre : Action/Adventure,Series;Drama,Series WM/MediaCredits : Naveen Andrews/Nestor Carbonell/Emilie de Ravin/Michael Emerson/Jeff Fahey/Matthew Fox/Jorge Garcia/Josh Holloway/Daniel Dae Kim/Yunjin Kim/Ken Leung/Evangeline Lilly/Terry O'Quinn/Zuleikha Robinson;Jack Bender;;Alan Dale/Rebecca Mader/Kimberley Joseph/Neil Hopkins/Sheila Kelley/Jodi Lyn O'Keefe WM/ParentalRating: TV-14 WM/ParentalRatingReason: WM/ProviderRating: WM/OriginalReleaseTime: 0001-01-01T00:00:00Z WM/Language : en WM/MediaStationCallSign: WSOCDT WM/MediaStationName: WSOCDT (WSOC-DT) WM/MediaNetworkAffiliation: ABC Affiliate WM/MediaOriginalChannel: 1091 WM/MediaOriginalBroadcastDateTime: 2010-03-16T00:00:00Z WM/WMRVServiceID: ATSC-WSOCDT-9-1 WM/WMRVProgramID: !5C0F265599ABC76C214DB9DBF2D4CD06! WM/MediaOriginalRunTime: 1640261 WM/WMRVEncodeTime: 1978386 WM/MediaIsStereo: 1 WM/VideoClosedCaptioning: 1 WM/MediaIsRepeat: 0 WM/MediaIsLive : 0 WM/MediaIsTape : 0 WM/MediaIsDelay : 0 WM/MediaIsSubtitled: 0 WM/MediaIsMovie : 0 WM/MediaIsPremiere: 0 WM/MediaIsFinale: 0 WM/MediaIsSAP : 0 WM/WMRVRequestID: 663 WM/WMRVScheduleItemID: 635 WM/WMRVQuality : 3 WM/WMRVOriginalSoftPrePadding: 184 WM/WMRVOriginalSoftPostPadding: 180 WM/WMRVActualSoftPrePadding: 0 WM/WMRVHardPrePadding: 0 WM/Provider : Zap2it WM/ProviderCopyright: -? 2010 Microsoft Corporation. All Rights Reserved. Terms of Service: http://go.microsoft.com/fwlink/?LinkId=8430 WM/WMRVEndTime : 2140686 WM/WMRVExpirationDate: 1844674 WM/WMRVBitrate : 0 WM/WMRVKeepUntil: 184 WM/WMRVHardPostPadding: 0 WM/WMRVActualSoftPostPadding: 0 WM/WMRVContentProtectedPercent: 0 WM/WMRVInBandRatingSystem: 255 WM/WMRVInBandRatingLevel: 255 WM/WMRVInBandRatingAttributes: 0 WM/WMRVWatched : 1 WM/WMRVATSCContent: 1 WM/WMRVDTVContent: 1 WM/WMRVHDContent: 1 WM/WMRVContentProtected: 0 WM/MediaThumbTimeStamp: 0 WM/MediaThumbWidth: 352 WM/MediaThumbHeight: 198 WM/MediaThumbStride: 105 WM/MediaThumbRet: 0 WM/MediaThumbType: 3 WM/MediaThumbRatingSystem: 1 WM/MediaThumbRatingLevel: 5 WM/MediaThumbRatingAttributes: 0 WM/MediaThumbAspectRatioX: 16 WM/MediaThumbAspectRatioY: 9 WMFSDKVersion : 11.0.6001.7006 WMFSDKNeeded : 0.0.0.0000 VBR Peak : 159 IsVBR : 1 title : Lost author : copyright : comment : Duration: 00:00:16.17, start: 62.738000, bitrate: 10832 kb/s Stream #0.0: Invalid Codec type -1 Stream #0.1: Audio: ac3, 48000 Hz, 5.1, s16, 384 kb/s Stream #0.2: Video: mpeg2video, yuv420p, 704x480 [PAR 64:45 DAR 1408:675], 13152 kb/s, 56.64 fps, 119.88 tbr, 1k tbn, 119.88 tbc Output #0, dvd, to 'out.mpg': Metadata: encoder : Lavf52.56.0 Stream #0.0: Video: mpeg2video, yuv420p, 704x480 [PAR 64:45 DAR 1408:675], q=2-31, 13152 kb/s, 90k tbn, 119.88 tbc Stream #0.1: Audio: ac3, 48000 Hz, 5.1, 384 kb/s Stream mapping: Stream #0.2 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding [dvd @ 03846a30]st:0 error, non monotone timestamps 7470 >= 4500 av_interleaved_write_frame(): Error while opening file Thanks! Dennis

1 0

[PATCH] Add loop option to ffplay
by krueger＠signal7.de 18 Mar '10

18 Mar '10

The following patch adds a -loop option to ffplay, which I find very handy when reviewing raw footage. Provided this is generally accepted, there is the question how to treat the conflict between autoexit and loop. One could change this from OPT_BOOL to a function which in both cases aborts with an error because these two things contradict or could output a warning telling the user that only one will be used or it could just do one of the two things (which is what is implemented in this patch but probably not the most user-friendly). Let me know which one it shall be and I will modify the patch accordingly. Regards, Robert

2 1

Can't decode .flv if it contains audio only]
by hanke＠brailcom.org 18 Mar '10

18 Mar '10

Hello, does somebody please have an answer to the bellow question? Thank you, Hynek Hanke I have trouble using ffmpeg to decode some .flv videos recorded through Red5. If the users camera is on and the stream contains video, I can use *ffmpeg -i stream2.flv -vn -f mp3 test.mp3* Stream #0.0: Video: flv, yuv420p, 160x120, 1k tbr, 1k tbn, 1k tbc Stream #0.1: Audio: nellymoser, 44100 Hz, mono, s16 *and produce a valid test.mp3* If the stream however contains no video because users camera is off, otherwise recorded in exactly the same way, this procedure fails: *ffmpeg -i stream1.flv -vn -f mp3 test.mp3* [flv @ 0x155fa60]skipping flv packet: type 0, size 12954112, flags 0 [flv @ 0x155fa60]Could not find codec parameters (Video: 0x0000) [flv @ 0x155fa60]Could not find codec parameters (Audio: 0x0000, 0 channels, s16) *chatroom-localhost-1-stream-1.flv: could not find codec parameters * This is the full listing: FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --extra-version=svn17737+3:0.svn20090303-1ubuntu6 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --disable-stripping --disable-vhook --enable-libdc1394 --enable-shared --disable-static libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 0 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Apr 10 2009 23:20:33, gcc: 4.3.3 [flv @ 0x1c2ca60]skipping flv packet: type 0, size 122880, flags 0 [flv @ 0x1c2ca60]Could not find codec parameters (Video: 0x0000) [flv @ 0x1c2ca60]Could not find codec parameters (Audio: nellymoser, 0 channels, s16) chatroom-localhost-1-stream-15.flv: could not find codec parameters The .flv file can be found here: http://www.freebsoft.org/~hanke/chatroom-localhost-1-stream-1.flv Can you please help how to fix it or how to find more information on what is wrong? Thank you very much, Hynek Hanke

1 0

Differences in Thumbnail generation?
by thirdgruv＠yahoo.com 18 Mar '10

18 Mar '10

I was using this: FFmpeg version SVN-r18145, Copyright (c) 2000-2009 Fabrice Bellard, et al. ?configuration: --enable-gpl --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libxvid ?libavutil ? ? 50. 1. 0 / 50. 1. 0 ?libavcodec ? ?52.22. 2 / 52.22. 2 ?libavformat ? 52.32. 0 / 52.32. 0 ?libavdevice ? 52. 1. 0 / 52. 1. 0 ?libswscale ? ? 0. 7. 1 / ?0. 7. 1 ?libpostproc ? 51. 2. 0 / 51. 2. 0 ?built on Mar 22 2009 18:22:55, gcc: 4.3.2 Now, I have upgraded to a recent FFMPEG version.? The problem is the script I'm using uses the thumbnail pulled from the video and now it's breaking.? The output is below. 1) Is FFMPEG thumbnail generation different between the versions?? If so, how? 2) Or is something else wrong?? Does it look like encoding is being performed correctly?? (Lines 20-24 below make me question) [0] => FFmpeg version SVN-r22567, Copyright (c) 2000-2010 the FFmpeg developers [1] => built on Mar 16 2010 19:20:55 with gcc 4.3.2 [2] => configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libx264 --enable-libxvid --enable-x11grab [3] => libavutil 50.12. 0 / 50.12. 0 [4] => libavcodec 52.59. 0 / 52.59. 0 [5] => libavformat 52.56. 0 / 52.56. 0 [6] => libavdevice 52. 2. 0 / 52. 2. 0 [7] => libswscale 0.10. 0 / 0.10. 0 [8] => libpostproc 51. 2. 0 / 51. 2. 0 [9] => [avi @ 0x12383d0]non-interleaved AVI [10] => Input #0, avi, from './uploads_vid/tmp/phpuwQ53l': [11] => Metadata: [12] => ISFT : CASIO EX-FH20 [13] => Duration: 00:00:02.70, start: 0.000000, bitrate: 30179 kb/s [14] => Stream #0.0: Video: mjpeg, yuvj422p, 1280x720, 29.97 tbr, 29.97 tbn, 29.97 tbc [15] => Stream #0.1: Audio: adpcm_ima_wav, 44100 Hz, 1 channels, s16, 176 kb/s [16] => Output #0, mjpeg, to './uploads_vid/1000/6/ phpuwQ53l_thumb_default.jpg': [17] => Metadata: [18] => encoder : Lavf52.56.0 [19] => Stream #0.0: Video: mjpeg, yuvj422p, 172x98, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc [20] => Stream mapping: [21] => Stream #0.0 -> #0.0 [22] => Press [q] to stop encoding [23] => frame= 0 fps= 0 q=0.0 Lsize= 0kB time=10000000000.00 bitrate= 0.0kbits/s [24] => video:0kB audio:0kB global headers:0kB muxing overhead nan% Thanks, Steve

1 0

Compile issues
by rootese＠gmail.com 18 Mar '10

18 Mar '10

Hi I have a question on using ffmpeg to convert a video file to a .avi. I have a cheap mp4 player that has a "RockChip" in it making it almost impossible to convert a video to it. I included a screenshot of what the properties should be in able to watch a video on it. But when I use this command: ffmpeg -i 'INFILE.avi' -b 300k -ab 128k -r 20 -s qvga -vcodec libxvid -acodec mp2 -ac 2 'OUTFILE.avi' it converts it to what I want it to be but after I transfer it and try to watch it, I get a file warning "format error" and it doesn't play. Any idea why this is happening? Thanks for reading my question

1 0

a difference in format/family
by jshupert＠pps-inc.com 18 Mar '10

18 Mar '10

Friends, I am using ffmpeg to pull out selections from a larger - master file. these are mpg2 ~ 20 min that i am pulling many items ~ :40 sec each. I am using the command ffmpeg -i 0112.mpg -vcodec copy -acodec copy -ss 00:00:09 -t 0:00:31 0112-03.mpg the resultant file seems 100% fine. but if i analyze it with media info i find an odd diffrence here is the master General #0 Complete name : D:\VidC_05_shr\rider_test\0112.mpg Format : MPEG-2 Program Format/Family : MPEG-2 File size : 1.28 GiB PlayTime : 18mn 9s Bit rate : 10.1 Mbps here is the sub part General #0 Complete name : D:\VidC_05_shr\rider_test\0112-03.mpg Format : MPEG-1 Program Format/Family : MPEG-1 File size : 18.9 MiB PlayTime : 30s 163ms Bit rate : 5261 Kbps ---------------------------------------------- Q- so why is the sub clip seen as Format MPEG-1 , Format/Family MPEG-1? as you can see i am doing -vcodec copy -acodec copy , and the substance of the file IS ok. Is this a header thing? my end use may be to make dvds here is the report from mediaInfo in total from both the master file--------------------------------------- General #0 Complete name : D:\VidC_05_shr\rider_test\0112.mpg Format : MPEG-2 Program Format/Family : MPEG-2 File size : 1.28 GiB PlayTime : 18mn 9s Bit rate : 10.1 Mbps Video #0 Codec : MPEG-2 Video Codec/Family : MPEG-V Codec profile : Main at Main Codec settings, Matrix : Standard PlayTime : 18mn 9s Bit rate mode : CBR Bit rate : 9158 Kbps Nominal bit rate : 5000 Kbps Width : 720 pixels Height : 480 pixels Display Aspect ratio : 4/3 Frame rate : 29.970 fps Standard : NTSC Chroma : 4:2:0 Interlacement : Progressive Bits/(Pixel*Frame) : 0.483 Audio #0 Codec : MPEG-1 Audio layer 2 PlayTime : 18mn 9s Bit rate mode : CBR Bit rate : 224 Kbps Channel(s) : 2 channels Sampling rate : 48.0 KHz Resolution : 16 bits Menu #0 Codec : DVD-Video ----------------------------------------( the sub clip General #0 Complete name : D:\VidC_05_shr\rider_test\0112-03.mpg Format : MPEG-1 Program Format/Family : MPEG-1 File size : 18.9 MiB PlayTime : 30s 163ms Bit rate : 5261 Kbps Video #0 Codec : MPEG-2 Video Codec/Family : MPEG-V Codec profile : Main at Main Codec settings, Matrix : Standard PlayTime : 30s 163ms Bit rate mode : CBR Bit rate : 4672 Kbps Nominal bit rate : 5000 Kbps Width : 720 pixels Height : 480 pixels Display Aspect ratio : 4/3 Frame rate : 29.970 fps Standard : NTSC Chroma : 4:2:0 Interlacement : Progressive Bits/(Pixel*Frame) : 0.483 Audio #0 Codec : MPEG-1 Audio layer 2 PlayTime : 29s 952ms Bit rate mode : CBR Bit rate : 224 Kbps Channel(s) : 2 channels Sampling rate : 48.0 KHz Resolution : 16 bits Video0 delay : -131ms thanks much! jim s

4 5

Cygwin Compilation gives stdio.h __sgetc_r error
by sun_radha＠yahoo.com 18 Mar '10

18 Mar '10

All, When I try to compile ffmpeg in cygwin I get the following error: CC ? ? ?libavfilter/allfilters.o In file included from ./libavutil/common.h:34, ? ? ? ? ? ? ? ? from ./libavutil/avutil.h:71, ? ? ? ? ? ? ? ? from libavfilter/avfilter.h:25, ? ? ? ? ? ? ? ? from libavfilter/allfilters.c:22: /usr/include/stdio.h:517: error: no previous prototype for '__sgetc_r' make: *** [libavfilter/allfilters.o] Error 1 Here are the configuration options: ./configure --enable-static --enable-postproc --enable-avfilter --enable-avfilter-lavf --enable-gpl --disable-indevs --disable-outdevs --disable-ffplay --disable-ffserver --enable-swscale --enable-debug=3 --disable-devices --enable-runtime-cpudetect --enable-hardcoded-tables Any ideas? Thanks Sen

2 2

bitrate question
by m.louvel＠gmail.com 18 Mar '10

18 Mar '10

Hi, I've built a stream with ffmpeg with the following command line : ffmpeg -y -s hd1080 -i HD/HP/h264/HP6_1080.mov -vstats_file /tmp/stats_HP_6_S3.log -psnr -acodec libfaac -ab 128k -vcodec libx264 -vpre hq -vpre main -b 10000000 -bt 10000000 -threads 0 -level 31 -s hd480 -r 30 /tmp/HP6_S3.mp4 When I gather information on the created stream with ffprobe I get : Duration: 00:01:41.03, start: 0.000000, bitrate: 7277 kb/s Stream #0.0(eng): Video: h264, yuv420p, 852x480, 7143 kb/s, 23.99 fps, 30 tbr, 30 tbn, 60 tbc Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 127 kb/s And when I look at the vstats_file I see that the bitrate fluctuates (a lot) between 45000 kb/s and 0 kb/s. The mean is : 9095.1 kb/s and the standard deviation is 8501.50. What those values mean ? How are they related together ? thanks, Maxime -- Maxime Louvel +33 6 85 91 05 30 3 rue charreton 38000 Grenoble France

2 2

Schroedinger 1.0.9 Mingw32
by mark＠mdsh.com 17 Mar '10

17 Mar '10

Hi, Has anyone managed to compile ffmpeg for Win32 with Schroedinger by crosscompiling on Linux with the mingw32 tools? I've got a static ffmpeg to compile fairly easily, but if try to use libschroedinger ffmpeg crashes. From the back-trace I guess that ORC is the library that is doing something wrong, but ORC compiled fine as far as I can tell. Any hints from anyone would be very welcome. Thanks. K:\>mingwrt-3.18-mingw32\bin\gdb K:\i386-win32\FFmpeg-static\ffmpeg_g.exe GNU gdb (GDB) 7.0.50.20100202 Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "mingw32". For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>... Reading symbols from K:\i386-win32\FFmpeg-static\ffmpeg_g.exe...done. (gdb) run -i "Compression test clips.mov" -b 2500000 -vcodec libschroedinger -strict 2 -an -y out.ts Starting program: K:\i386-win32\FFmpeg-static\ffmpeg_g.exe -i "Compression test clips.mov" -b 2500000 -vcodec libschroedinger -strict 2 -an -y out.ts [New Thread 3784.0x11e8] FFmpeg version SVN-r22581, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 17 2010 14:35:22 with gcc 4.2.1-sjlj (mingw32-2) configuration: --prefix=/home/mdsh/mingw32 --enable-gpl --enable-version3 --enable-nonfree --target-os=mingw32 --arch=x86_32 --cross-prefix=i586-mingw32msvc- --extra-cflags='-I $HOME/mingw32/include -I /usr/i586-mingw32msvc/include/' --extra-ldflags='-L $HOME/mingw32/lib -L /usr/i586-mingw32msvc/lib/' --enable-memalign-hack --enable-w32threads --enable-runtime-cpudetect --enable-static --disable-shared --enable-libdirac --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libxvid --enable-libx264 libavutil 50.12. 0 / 50.12. 0 libavcodec 52.59. 0 / 52.59. 0 libavformat 52.56. 0 / 52.56. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x369b010]MAX_READ_SIZE:5000000 reached Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Compression test clips.mov': Metadata: major_brand : qt minor_version : 537199360 compatible_brands: qt Duration: 00:01:46.12, start: 0.000000, bitrate: 30344 kb/s Stream #0.0(eng): Video: dvvideo, yuv420p, 720x576, 28800 kb/s, PAR 59:54 DA R 295:216, 25 fps, 25 tbr, 25 tbn, 25 tbc Stream #0.1(eng): Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s Stream #0.2(eng): Audio: pcm_s16le, 48000 Hz, 1 channels, s16, 768 kb/s Stream #0.3(eng): Data: tmcd / 0x64636D74 Program received signal SIGSEGV, Segmentation fault. 0x7c91b21a in ntdll!RtlpWaitForCriticalSection () from C:\WINNT\system32\ntdll.dll (gdb) bt #0 0x7c91b21a in ntdll!RtlpWaitForCriticalSection () from C:\WINNT\system32\ntdll.dll #1 0x7c901046 in ntdll!RtlEnumerateGenericTableLikeADirectory () from C:\WINNT\system32\ntdll.dll #2 0x0036c210 in ?? () #3 0x00960615 in orc_memcpy (d1=0x370d9a6, s1=0xcf8440, n=18) at orcfunctions.c:81 Backtrace stopped: frame did not save the PC (gdb) -- Mark

2 3

aac encoder quality
by stephenp＠mediascend.com 17 Mar '10

17 Mar '10

When I use ffmpeg's default aac encoder, the audio quality is horrible. It sounds hollow, crackly, etc. Bit rate and frequency changes don't clear it up. I know that there was a change in the audio codec - no more 'acodec faac' - in the past. It is noticeably worse than the mp3 encoder as well. Is the aac encoder just bad or what? I tried stripping out the audio into a wav, encoding that with neroAacEnc2, and muxing it back into the final video and the audio sounds great. Also, handbrake and adobe media encoder don't have this problem. I would use the mp3 encoder but Flash won't play it, so I need aac. I have no problem using the workaround I detailed, but it blows my mind that I can't get good audio from the aac encoder provided with standard ffmpeg builds. I also haven't found many others discussing this on the web, so I am worried it might be something I am doing. In case anyone is wondering, here's a sample command line: ffmpeg -i input.mov -fpre "presets\libx264-normal.ffpreset" -y -threads 0 -f mp4 -vcodec libx264 -b 1600k -acodec aac -ab 96k -ac 2 out.mp4 Nothing fancy. I am using builds from http://ffmpeg.arrozcru.org/autobuilds/ Can someone shed some light on why the built in aac encoder outputs such poor audio?

4 5

Has thumnail generation changed?
by thirdgruv＠yahoo.com 17 Mar '10

17 Mar '10

I have a video script that uses FFMPEG (the previous version dated back to March 2009). I was using this: FFmpeg version SVN-r18145, Copyright (c) 2000-2009 Fabrice Bellard, et al. ?configuration: --enable-gpl --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libxvid ?libavutil ? ? 50. 1. 0 / 50. 1. 0 ?libavcodec ? ?52.22. 2 / 52.22. 2 ?libavformat ? 52.32. 0 / 52.32. 0 ?libavdevice ? 52. 1. 0 / 52. 1. 0 ?libswscale ? ? 0. 7. 1 / ?0. 7. 1 ?libpostproc ? 51. 2. 0 / 51. 2. 0 ?built on Mar 22 2009 18:22:55, gcc: 4.3.2 Now, I have upgraded to a very recent version.? The problem is the script uses the thumbnail pulled from the video and there seems to be a problem that is breaking the script.? The script dev thinks the FFMPEG thumbnail generation may be different between the versions and causing the problem.? The output is below.? My questions are 1) Does it look like encoding is being performed correctly?? I am using x264 for the video codec. 2) Is it possible that FFMPEG is generating thumbnails differently?? If so, how does this happen? 3) Are there other relevant errors? [0] => FFmpeg version SVN-r22567, Copyright (c) 2000-2010 the FFmpeg developers [1] => built on Mar 16 2010 19:20:55 with gcc 4.3.2 [2] => configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libx264 --enable-libxvid --enable-x11grab [3] => libavutil 50.12. 0 / 50.12. 0 [4] => libavcodec 52.59. 0 / 52.59. 0 [5] => libavformat 52.56. 0 / 52.56. 0 [6] => libavdevice 52. 2. 0 / 52. 2. 0 [7] => libswscale 0.10. 0 / 0.10. 0 [8] => libpostproc 51. 2. 0 / 51. 2. 0 [9] => [avi @ 0x12383d0]non-interleaved AVI [10] => Input #0, avi, from './uploads_vid/tmp/phpuwQ53l': [11] => Metadata: [12] => ISFT : CASIO EX-FH20 [13] => Duration: 00:00:02.70, start: 0.000000, bitrate: 30179 kb/s [14] => Stream #0.0: Video: mjpeg, yuvj422p, 1280x720, 29.97 tbr, 29.97 tbn, 29.97 tbc [15] => Stream #0.1: Audio: adpcm_ima_wav, 44100 Hz, 1 channels, s16, 176 kb/s [16] => Output #0, mjpeg, to './uploads_vid/1000/6/ phpuwQ53l_thumb_default.jpg': [17] => Metadata: [18] => encoder : Lavf52.56.0 [19] => Stream #0.0: Video: mjpeg, yuvj422p, 172x98, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc [20] => Stream mapping: [21] => Stream #0.0 -> #0.0 [22] => Press [q] to stop encoding [23] => frame= 0 fps= 0 q=0.0 Lsize= 0kB time=10000000000.00 bitrate= 0.0kbits/s [24] => video:0kB audio:0kB global headers:0kB muxing overhead nan%

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Audio Transcoding Question
by steffn＠gmx.at 17 Mar '10

17 Mar '10

Hello! I use ffmpeg to transcode audio files from an arbitrary (decodable for my installation of ffmpeg and according libraries) format to a certain fomat (ie. libmp3lame, 128kbit, 44100kHz). I did this with the following command: ffmpeg -y -i my_input_file -ab 128k -ar 44100 -acodec libmp3lame my_output_file This worked fine for 99% of all files I had to handle. Recently I stumbled into files where the transcoding wasn't performed, but I got the following ouput: ffmpeg -y -i my_input_file -ab 128k -ar 44100 -acodec libmp3lame my_output_file FFmpeg version SVN-r22565, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 16 2010 15:08:31 with gcc 4.0.1 (Apple Inc. build 5493) configuration: --enable-shared --enable-libmp3lame --disable-mmx libavutil 50.12. 0 / 50.12. 0 libavcodec 52.59. 0 / 52.59. 0 libavformat 52.56. 0 / 52.56. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 [mp3 @ 0x1802600]max_analyze_duration reached [mp3 @ 0x1802600]Estimating duration from bitrate, this may be inaccurate Input #0, mp3, from 'my_input_file': Duration: 00:52:23.62, start: 0.000000, bitrate: 128 kb/s Stream #0.0: Audio: mp3, 44100 Hz, 2 channels, s16, 128 kb/s Unable to find a suitable output format for 'my_output_file' I read the doc, faq and googled and the solution i came up with is to use the '-f fmt' option in the way of '-f mp3'. So I am about to change my call to: ffmpeg -y -i my_input_file -ab 128k -ar 44100 -acodec libmp3lame -f mp3 my_output_file If I use ffmpeg with these parameters I get the desired output file and a lot of error messages like: Press [q] to stop encoding [mp3 @ 0x1803600]Header missing Error while decoding stream #0.0 ... Error while decoding stream #0.0 Error while decoding stream #0.0ate= 128.0kbits/s Error while decoding stream #0.0 Last message repeated 5 times [mp3 @ 0x1803600]overread, skip -4 enddists: -1 -1 [mp3 @ 0x1803600]overread, skip -7 enddists: -3 -3 Last message repeated 1 times [mp3 @ 0x1803600]overread, skip -7 enddists: -4 -4 [mp3 @ 0x1803600]Header missing Error while decoding stream #0.0 .... Error while decoding stream #0.0 Last message repeated 14 times [mp3 @ 0x1803600]overread, skip -5 enddists: -1 -1 [mp3 @ 0x1803600]overread, skip -5 enddists: -3 -3 [mp3 @ 0x1803600]overread, skip -5 enddists: -4 -4 [mp3 @ 0x1803600]overread, skip -7 enddists: -4 -4 [mp3 @ 0x1803600]Header missing Error while decoding stream #0.0 ... Error while decoding stream #0.0 Last message repeated 3 times [mp3 @ 0x1803600]overread, skip -6 enddists: -5 -5 [mp3 @ 0x1803600]overread, skip -8 enddists: -5 -5 [mp3 @ 0x1803600]Header missingrate= 128.0kbits/s The question I have now is, could someone explain to me what is actually happening if i use the -f parameter. The doc is not very exhaustive about it and only says: `-f fmt' - Force format. Does the -f option influence how the input is understood or how the output file is generated? Why is the -acodec libmp3lame option not sufficient? Do I keep the ability to decode various input formats and generate a mp3 while using '-f mp3'? Are those error messages I get critical (the generated mp3 does sound ok)? Thank you very much for any information in advance! Steffn

2 1

Has thumbnail generation changed?
by thirdgruv＠yahoo.com 17 Mar '10

17 Mar '10

I have a video script that uses FFMPEG (the previous version dated back to March 2009).? I updated FFMPEG with the following: I was using this: FFmpeg version SVN-r18145, Copyright (c) 2000-2009 Fabrice Bellard, et al. ?configuration: --enable-gpl --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable-libx264 --enable-libxvid ?libavutil ? ? 50. 1. 0 / 50. 1. 0 ?libavcodec ? ?52.22. 2 / 52.22. 2 ?libavformat ? 52.32. 0 / 52.32. 0 ?libavdevice ? 52. 1. 0 / 52. 1. 0 ?libswscale ? ? 0. 7. 1 / ?0. 7. 1 ?libpostproc ? 51. 2. 0 / 51. 2. 0 ?built on Mar 22 2009 18:22:55, gcc: 4.3.2 Now, I have upgraded to a very recent version.? The problem is the script uses the thumbnail pulled from the video and there seems to be a problem that is breaking the script.? The script dev thinks the FFMPEG thumbnail generation may be different between the versions and causing the problem.? The output is below.? My questions are 1) Does it look like encoding is being performed correctly? 2) Is it possible that FFMPEG is generating thumbnails differently?? If so, how does this happen? 3) Are there other relevant errors? [0] => FFmpeg version SVN-r22567, Copyright (c) 2000-2010 the FFmpeg developers [1] => built on Mar 16 2010 19:20:55 with gcc 4.3.2 [2] => configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libx264 --enable-libxvid --enable-x11grab [3] => libavutil 50.12. 0 / 50.12. 0 [4] => libavcodec 52.59. 0 / 52.59. 0 [5] => libavformat 52.56. 0 / 52.56. 0 [6] => libavdevice 52. 2. 0 / 52. 2. 0 [7] => libswscale 0.10. 0 / 0.10. 0 [8] => libpostproc 51. 2. 0 / 51. 2. 0 [9] => [avi @ 0x12383d0]non-interleaved AVI [10] => Input #0, avi, from './uploads_vid/tmp/phpuwQ53l': [11] => Metadata: [12] => ISFT : CASIO EX-FH20 [13] => Duration: 00:00:02.70, start: 0.000000, bitrate: 30179 kb/s [14] => Stream #0.0: Video: mjpeg, yuvj422p, 1280x720, 29.97 tbr, 29.97 tbn, 29.97 tbc [15] => Stream #0.1: Audio: adpcm_ima_wav, 44100 Hz, 1 channels, s16, 176 kb/s [16] => Output #0, mjpeg, to './uploads_vid/1000/6/phpuwQ53l_thumb_default.jpg': [17] => Metadata: [18] => encoder : Lavf52.56.0 [19] => Stream #0.0: Video: mjpeg, yuvj422p, 172x98, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc [20] => Stream mapping: [21] => Stream #0.0 -> #0.0 [22] => Press [q] to stop encoding [23] => frame= 0 fps= 0 q=0.0 Lsize= 0kB time=10000000000.00 bitrate= 0.0kbits/s [24] => video:0kB audio:0kB global headers:0kB muxing overhead nan%

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Electronic program guide in the Transport Stream
by faizan.ahmed39＠gmail.com 17 Mar '10

17 Mar '10

hi i need info about how to access/modify/extract the electronic program guide in the transport stream.i have some TS files which have EPG and TSReader shows it but i don't know how to access it in ffmpeg.my objective is to embed EPG in a TS file.but i can't seem to get any info about how to do it so plz i need some guidance -- View this message in context: http://n4.nabble.com/Electronic-program-guide-in-the-Transport-Stream-tp159… Sent from the FFmpeg-users mailing list archive at Nabble.com.

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reset pts/dts and stream copy
by sun_radha＠yahoo.com 17 Mar '10

17 Mar '10

Hi All, I am writing a piece of code that copies all audio, video and subtitle streams to a new mpeg file and at the same time handle any time-stamp rollovers and discontinuities. But the destination streams appear in the reverse order. Input file: Duration: 00:02:05.08, start: 66193.736344, bitrate: 4093 kb/s ? Program 1 ??? Stream #0.0[0x7c0]: Video: mpeg2video, yuv420p, 704x480 [PAR 10:11 DAR 4:3], 15000 kb/s, 29.97 tbr, 90k tbn, 59.94 tbc ??? Stream #0.1[0x7c1](eng): Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s ??? Stream #0.2[0x7c2](spa): Audio: ac3, 48000 Hz, mono, s16, 128 kb/s Output file: Duration: 00:02:05.08, start: 66193.736344, bitrate: 3978 kb/s ??? Stream #0.0[0x81]: Audio: ac3, 48000 Hz, mono, s16, 128 kb/s ??? Stream #0.1[0x80]: Audio: ac3, 48000 Hz, stereo, s16, 192 kb/s ??? Stream #0.2[0x1e0]: Video: mpeg2video, yuv420p, 704x480 [PAR 10:11 DAR 4:3], 15000 kb/s, 29.97 tbr, 90k tbn, 59.94 tbc At least one output file must be specified Any Ideas. Also any clues on how to reset the pts/dts of streams to start from 0. Sen

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Can ffmpeg decode camrec files?
by bmintern＠gmail.com 17 Mar '10

17 Mar '10

Hi, I have files with .camrec extensions as created by TechSmith CamStudio 6.0. I would like to convert these to .mp4, and I was wondering if there is any way to decode this type of file. I compiled ffmpeg from the latest version by following the instructions at http://ubuntuforums.org/showthread.php?t=786095 Are there any --enable options I can give to ./configure in order to compile in support for camrec? Or is it possible that support is already compiled in but I need to explicitly give it certain -acodec and -vcodec parameters for the input file? My ffmpeg output is included at the bottom. If ffmpeg can't handle this format, does anyone know of any open source tools that can? Thank you very much for your assistance. Brandon $ ffmpeg -formats FFmpeg version SVN-r22564, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 15 2010 21:21:16 with gcc 4.4.1 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libxvid --enable-x11grab libavutil 50.12. 0 / 50.12. 0 libavcodec 52.59. 0 / 52.59. 0 libavformat 52.56. 0 / 52.56. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 libpostproc 51. 2. 0 / 51. 2. 0 File formats: D. = Demuxing supported .E = Muxing supported -- E 3g2 3GP2 format E 3gp 3GP format D 4xm 4X Technologies format D IFF IFF format D ISS Funcom ISS format D MTV MTV format DE RoQ raw id RoQ format D aac raw ADTS AAC DE ac3 raw AC-3 E adts ADTS AAC D aea MD STUDIO audio DE aiff Audio IFF DE alaw PCM A-law format DE alsa ALSA audio output DE amr 3GPP AMR file format D anm Deluxe Paint Animation D apc CRYO APC format D ape Monkey's Audio DE asf ASF format E asf_stream ASF format DE ass SSA/ASS format DE au SUN AU format DE avi AVI format E avm2 Flash 9 (AVM2) format D avs AVS format D bethsoftvid Bethesda Softworks VID format D bfi Brute Force & Ignorance D bink Bink D c93 Interplay C93 D caf Apple Core Audio Format D cavsvideo raw Chinese AVS video D cdg CD Graphics Format E crc CRC testing format DE daud D-Cinema audio format DE dirac raw Dirac DE dnxhd raw DNxHD (SMPTE VC-3) D dsicin Delphine Software International CIN format DE dts raw DTS DE dv DV video format D dv1394 DV1394 A/V grab E dvd MPEG-2 PS format (DVD VOB) D dxa DXA D ea Electronic Arts Multimedia Format D ea_cdata Electronic Arts cdata DE eac3 raw E-AC-3 DE f32be PCM 32 bit floating-point big-endian format DE f32le PCM 32 bit floating-point little-endian format DE f64be PCM 64 bit floating-point big-endian format DE f64le PCM 64 bit floating-point little-endian format DE ffm FFM (FFserver live feed) format D film_cpk Sega FILM/CPK format DE filmstrip Adobe Filmstrip DE flac raw FLAC D flic FLI/FLC/FLX animation format DE flv FLV format E framecrc framecrc testing format E gif GIF Animation D gsm raw GSM DE gxf GXF format DE h261 raw H.261 DE h263 raw H.263 DE h264 raw H.264 video format D idcin id Cinematic format DE image2 image2 sequence DE image2pipe piped image2 sequence D ingenient raw Ingenient MJPEG D ipmovie Interplay MVE format E ipod iPod H.264 MP4 format D iv8 A format generated by IndigoVision 8000 video server D lmlm4 lmlm4 raw format DE m4v raw MPEG-4 video format DE matroska Matroska file format DE mjpeg raw MJPEG video DE mlp raw MLP D mm American Laser Games MM format DE mmf Yamaha SMAF E mov MOV format D mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG-4/Motion JPEG 2000 format E mp2 MPEG audio layer 2 DE mp3 MPEG audio layer 3 E mp4 MP4 format D mpc Musepack D mpc8 Musepack SV8 DE mpeg MPEG-1 System format E mpeg1video raw MPEG-1 video E mpeg2video raw MPEG-2 video DE mpegts MPEG-2 transport stream format D mpegtsraw MPEG-2 raw transport stream format D mpegvideo raw MPEG video E mpjpeg MIME multipart JPEG format D msnwctcp MSN TCP Webcam stream DE mulaw PCM mu-law format D mvi Motion Pixels MVI format DE mxf Material eXchange Format E mxf_d10 Material eXchange Format, D-10 Mapping D nc NC camera feed format D nsv Nullsoft Streaming Video E null raw null video format DE nut NUT format D nuv NuppelVideo format DE ogg Ogg D oma Sony OpenMG audio DE oss Open Sound System playback E psp PSP MP4 format D psxstr Sony Playstation STR format D pva TechnoTrend PVA file and stream format D qcp QCP format D r3d REDCODE R3D format DE rawvideo raw video format E rcv VC-1 test bitstream D rl2 RL2 format DE rm RealMedia format D rpl RPL/ARMovie format E rtp RTP output format DE rtsp RTSP output format DE s16be PCM signed 16 bit big-endian format DE s16le PCM signed 16 bit little-endian format DE s24be PCM signed 24 bit big-endian format DE s24le PCM signed 24 bit little-endian format DE s32be PCM signed 32 bit big-endian format DE s32le PCM signed 32 bit little-endian format DE s8 PCM signed 8 bit format D sdp SDP D shn raw Shorten D siff Beam Software SIFF D smk Smacker video D sol Sierra SOL format DE sox SoX native format E spdif IEC958 - S/PDIF (IEC-61937) E svcd MPEG-2 PS format (VOB) DE swf Flash format D thp THP D tiertexseq Tiertex Limited SEQ format D tmv 8088flex TMV DE truehd raw TrueHD D tta True Audio D txd Renderware TeXture Dictionary DE u16be PCM unsigned 16 bit big-endian format DE u16le PCM unsigned 16 bit little-endian format DE u24be PCM unsigned 24 bit big-endian format DE u24le PCM unsigned 24 bit little-endian format DE u32be PCM unsigned 32 bit big-endian format DE u32le PCM unsigned 32 bit little-endian format DE u8 PCM unsigned 8 bit format D vc1 raw VC-1 D vc1test VC-1 test bitstream format E vcd MPEG-1 System format (VCD) D video4linux Video4Linux device grab D video4linux2 Video4Linux2 device grab D vmd Sierra VMD format E vob MPEG-2 PS format (VOB) DE voc Creative Voice file format D vqf Nippon Telegraph and Telephone Corporation (NTT) TwinVQ D w64 Sony Wave64 format DE wav WAV format D wc3movie Wing Commander III movie format D wsaud Westwood Studios audio format D wsvqa Westwood Studios VQA format D wv WavPack D x11grab X11grab D xa Maxis XA File Format DE yuv4mpegpipe YUV4MPEG pipe format $ ffmpeg -y -i input.camrec -acodec libfaac -ab 48k -vcodec libx264 -r 15 -vpre hq -crf 25 -threads 0 output.mp4 FFmpeg version SVN-r22564, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 15 2010 21:21:16 with gcc 4.4.1 configuration: --enable-gpl --enable-version3 --enable-nonfree --enable-postproc --enable-pthreads --enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libxvid --enable-x11grab libavutil 50.12. 0 / 50.12. 0 libavcodec 52.59. 0 / 52.59. 0 libavformat 52.56. 0 / 52.56. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 libpostproc 51. 2. 0 / 51. 2. 0 input.camrec: Unknown format

1 1

Invitation to connect on LinkedIn
by tiago.braga＠gmail.com 16 Mar '10

16 Mar '10

LinkedIn ------------Tiago Braga requested to add you as a connection on LinkedIn: ------------------------------------------ Emre, I'd like to add you to my professional network on LinkedIn. - Tiago Accept invitation from Tiago Braga http://www.linkedin.com/e/vAKFaBxC6PLPsepqjSe4ff4h9MAYb3h_ILL_NX/blk/I59128… View invitation from Tiago Braga http://www.linkedin.com/e/vAKFaBxC6PLPsepqjSe4ff4h9MAYb3h_ILL_NX/blk/I59128… ------------------------------------------ DID YOU KNOW you can conduct a more credible and powerful reference check using LinkedIn? Enter the company name and years of employment or the prospective employee to find their colleagues that are also in your network. This provides you with a more balanced set of feedback to evaluate that new hire. http://www.linkedin.com/e/rsr/inv-27/ ------ (c) 2010, LinkedIn Corporation

1 0

Can't decode .flv if it contains audio only
by hanke＠brailcom.org 16 Mar '10

16 Mar '10

Hello, I have trouble using ffmpeg to decode some .flv videos recorded through Red5. If the users camera is on and the stream contains video, I can use *ffmpeg -i stream2.flv -vn -f mp3 test.mp3* Stream #0.0: Video: flv, yuv420p, 160x120, 1k tbr, 1k tbn, 1k tbc Stream #0.1: Audio: nellymoser, 44100 Hz, mono, s16 *and produce a valid test.mp3* If the stream however contains no video because users camera is off, otherwise recorded in exactly the same way, this procedure fails: *ffmpeg -i stream1.flv -vn -f mp3 test.mp3* [flv @ 0x155fa60]skipping flv packet: type 0, size 12954112, flags 0 [flv @ 0x155fa60]Could not find codec parameters (Video: 0x0000) [flv @ 0x155fa60]Could not find codec parameters (Audio: 0x0000, 0 channels, s16) *chatroom-localhost-1-stream-1.flv: could not find codec parameters * This is the full listing: FFmpeg version 0.5-svn17737+3:0.svn20090303-1ubuntu6, Copyright (c) 2000-2009 Fabrice Bellard, et al. configuration: --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --extra-version=svn17737+3:0.svn20090303-1ubuntu6 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --disable-stripping --disable-vhook --enable-libdc1394 --enable-shared --disable-static libavutil 49.15. 0 / 49.15. 0 libavcodec 52.20. 0 / 52.20. 0 libavformat 52.31. 0 / 52.31. 0 libavdevice 52. 1. 0 / 52. 1. 0 libavfilter 0. 4. 0 / 0. 4. 0 libswscale 0. 7. 1 / 0. 7. 1 libpostproc 51. 2. 0 / 51. 2. 0 built on Apr 10 2009 23:20:33, gcc: 4.3.3 [flv @ 0x1c2ca60]skipping flv packet: type 0, size 122880, flags 0 [flv @ 0x1c2ca60]Could not find codec parameters (Video: 0x0000) [flv @ 0x1c2ca60]Could not find codec parameters (Audio: nellymoser, 0 channels, s16) chatroom-localhost-1-stream-15.flv: could not find codec parameters The .flv file can be found here: http://www.freebsoft.org/~hanke/chatroom-localhost-1-stream-1.flv Can you please help how to fix it or how to find more information on what is wrong? Thank you very much, Hynek Hanke

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my script for encoding to avi, mp4, ogg (for firefox html5 video tags) and/or flv (linux only)
by noisyb＠gmx.net 16 Mar '10

16 Mar '10

- uses only ffmpeg instead of all sorts of shit (that might not even be in your distro) - does 1 pass and/or 2 pass - no GUI == full control - no dependencies except ffmpeg - easy to understand - short - necessary configure flags for ffmpeg (e.g. for H.264 support) are explained - informative

1 0

how to loop a file playback with AV read frame
by vubrhar＠gmail.com 16 Mar '10

16 Mar '10

Hello I need some help with seeking in file back to zero position - here is what I am writing currently if(av_read_frame(avformatCtx, packet) < 0) { eof = 1; av_seek_frame(avformatCtx, ffStreamIdx, 0, AVSEEK_FLAG_FRAME); } else { stuffFrame( VideoBuffer, &frameAttrib, NULL, NULL, ... } Is it valid? I get vibrating picture afetr looping- may because of pts reordering? thank you for any help

2 2

Libavfilter Install Problems
by vxtremeben＠gmail.com 16 Mar '10

16 Mar '10

Hello, I have built and installed libavfilters from both svn:// svn.mplayerhq.hu/soc/libavfilter and svn://svn.ffmpeg.org/soc/libavfilter, but it does not appear the filters are installing correctly. I used the configuration variables --enable-gpl --enable-avfilter --enable-avfilter-lavf --enable-swscale, so the movie and overlay filters should be available, but appear as null (output below). Can someone please tell me what I am doing wrong? I have been through this process before, but have no idea what is going wrong now. Thank you! [root at localhost ~]# ffmpeg -filters FFmpeg version SVN-r22508, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 15 2010 21:45:31 with gcc 4.1.2 20080704 (Red Hat 4.1.2-46) configuration: --enable-gpl --enable-avfilter --enable-avfilter-lavf --enable-swscale libavutil 50.12. 0 / 50.12. 0 libavcodec 52.58. 0 / 52.58. 0 libavformat 52.55. 0 / 52.55. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.18. 0 / 1.18. 0 libswscale 0.10. 0 / 0.10. 0 Filters: crop Crop the input video to x:y:width:height. drawbox (null) fifo (null) format Convert the input video to one of the specified pixel formats. fps (null) hflip (null) negate (null) noformat Force libavfilter not to use any of the specified pixel formats for the input to the next filter. null Pass the source unchanged to the output. overlay (null) pad Add pads to the input image. rotate (null) scale Scale the input video to width:height size and/or convert the image format. setpts (null) slicify Pass the images of input video on to next video filter as multiple slices. split (null) transpose (null) vflip Flip the input video vertically. buffer (null) movie (null) nullsrc Null video source, never return images. nullsink Do absolutely nothing with the input video. -- Benjamin vxtremeben at gmail.com

2 2

Source codes of Mplayer svn version cross-compile crash...with a TI EVM DM6446
by kjyoo＠sbn-tech.com 16 Mar '10

16 Mar '10

*I downloaded Mplayer SVN Version Source code for poting to TI DM6446 Montavista Linux 4.0 Embeded Taget Board. My plan is cross-compiling in a host side. also Already I had tool-chain of TI. In a ./configure stage, I successfully set up to option flags ( CFLAGS,LDFLAG,....)* ------------------------------------------------------------------------------------------------------ ./configure \ --enable-cross-compile \ --cc=arm_v5t_le-gcc \ --host-cc=gcc \ --as=arm_v5t_le-as \ --ar=arm_v5t_le-ar \ --nm=arm_v5t_le-nm \ --ranlib=arm_v5t_le-ranlib \ --target=arm-linux \ --disable-mencoder \ --disable-big-endian \ --disable-fastmemcpy \ --disable-jpeg \ --disable-png \ --disable-dvb \ --disable-rtc \ --disable-radio-v4l2 \ --disable-tv \ --disable-tv-v4l1 \ --disable-tv-v4l2 \ --disable-tv-bsdbt848 \ --disable-pvr \ --disable-network \ --disable-dvdnav \ --disable-qtx \ --disable-xanim \ --disable-real \ --disable-xvid \ --enable-tremor-internal \ --disable-speex \ --enable-faad-fixed \ --disable-faac \ --disable-ladspa \ --disable-libdv \ --disable-toolame \ --disable-twolame \ --disable-mp3lib \ --disable-liba52 \ --disable-mad \ --enable-fbdev \ --disable-x11 \ --disable-xv \ --disable-arts \ --disable-alsa \ --confdir=/etc/mplayer \ --prefix=/home/kjyoo/mplayer_bin \ --disable-gif \ --disable-termcap \ --disable-sdl \ --disable-xvid \ --enable-armv5te \ --disable-libmpeg2 \ --extra-cflags="-O3 -mlittle-endian -mcpu=arm926ej-s -mtune=arm9e -msoft-float -fPIC -pipe -nostdinc -B${DEVKIT}/arm/v5t_le/lib/gcc/armv5tl-montavista-linuxeabi/3.4.3/ -isystem ${DEVKIT}/arm/v5t_le/target/usr/include -isystem ${DEVKIT}/arm/v5t_le/lib/gcc/armv5tl-montavista-linuxeabi/3.4.3/include -I${DEVKIT}/arm/v5t_le/target/usr/include -I${DEVKIT}/arm/v5t_le/lib/gcc/armv5tl-montavista-linuxeabi/3.4.3/include" \ --extra-ldflags="-L/opt/mv_pro_4.0/montavista/pro/devkit/arm/v5t_le/target/usr/lib" \ --with-freetype-config=/usr/bin/cross-freetype-config ------------------------------------------------------------------------------------------------------ *anyway I successfully done stage of "./configure" next, I runed "make" command. but unfortunately I met this compile error messages.* ------------------------------------------------------------------------------------------------------ ... armv5t_eabi-gcc -DHAVE_AV_CONFIG_H -I.. -I.. -Wmissing-prototypes -Wundef -Wdisabled-optimization -Wdeclaration-after-statement -std=gnu99 -Wall -Wno-switch -Wpointer-arith -Wredundant-decls -O4 -pipe -ffast-math -fomit-frame-pointer -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -Ilibdvdread4 -I. -mcpu=arm926ej-s -mtune=arm9e -msoft-float -fPIC -pipe -D_REENTRANT -c -o arm/dsputil_arm.o arm/dsputil_arm.S arm/asm.S: Assembler messages: arm/asm.S:62: Error: unknown pseudo-op: `.eabi_attribute' arm/dsputil_arm.S:25: Error: unknown pseudo-op: `.eabi_attribute' arm/dsputil_arm.S:110: Error: bad instruction `push {r4-r11,lr}' arm/dsputil_arm.S:113: Error: bad instruction `ldm r1,{r4-r7}' ... ------------------------------------------------------------------------------------------------------ *from this part, anymore i can't compile this source codes. I did my best. googling, searching TI Manual, asking deveolper internet groups... this time is last chance to me. please help me.. please give me advice! I can't use english well. Nevertheless, I try to asking for my works. thanks.*

2 1

Eliminate subtitles (text stream) of mepg4 .ts files
by victor＠eurovip.es 15 Mar '10

15 Mar '10

Hello, I would like to know how to eliminate subtitles (text stream) from recordings in mpeg4 format (files are .ts). Is it possible with ffmpeg? Thanks in advance for your answer regards Victor

5 17

SVN 22550: Missing dependency for demuxer matroska
by tfoucu＠gmail.com 15 Mar '10

15 Mar '10

/configure --disable-doc \ --disable-ffplay --disable-ffserver \ --disable-demuxers --disable-muxers \ --disable-decoders --disable-encoders \ --disable-parsers --disable-bsfs \ --disable-indevs --disable-outdevs \ --disable-protocols --disable-filters \ --enable-demuxer=matroska /usr/local/ffmpeg/build/libavformat/libavformat.a(matroskadec.o): In function `matroska_parse_block': /usr/local/ffmpeg/svn/libavformat/matroskadec.c:1673: undefined reference to `ff_rm_reorder_sipr_data' /usr/local/ffmpeg/build/libavformat/libavformat.a(matroskadec.o): In function `matroska_read_header': /usr/local/ffmpeg/svn/libavformat/matroskadec.c:1334: undefined reference to `ff_sipr_subpk_size'

2 1

Inserting a poster frame
by slyttleton＠mac.com 15 Mar '10

15 Mar '10

I have searched the forum but have not found what I'm looking for. I want to insert an image file as the first frame of a video (either before, during or after a conversion run). Is there a way that ffmpeg will indert an image into frame 1? Thanks in advance. Steve

1 0

vstats meaning
by m.louvel＠gmail.com 15 Mar '10

15 Mar '10

Hi, I've found any information on the meaning of the output of the -vstats option. I've only found : `-vstats' Dump video coding statistics to `vstats_HHMMSS.log'. But no explanation on the meaning of is dumped. Could someone help me on this ? cheers, Maxime -- Maxime Louvel +33 6 85 91 05 30 3 rue charreton 38000 Grenoble France

2 1

how to set metadata in AVStream/AVProgram/AVFormatContext
by faizan.ahmed39＠gmail.com 15 Mar '10

15 Mar '10

i'v been trying to set the metadata before or after my calling av_write_trailer() and metadata gets set but when i read the same file after open_file and find_stream_info the same tags/keys are not there av_metadata_set(&s->metadata, "title", "FORMAT CONTEXT"); -- View this message in context: http://n4.nabble.com/how-to-set-metadata-in-AVStream-AVProgram-AVFormatCont… Sent from the FFmpeg-users mailing list archive at Nabble.com.

1 0

pcm_bluray audio
by pupilla＠libero.it 15 Mar '10

15 Mar '10

Hi Folks, I converting a transport stream file to mkv. Here is: ffmpeg -v 10 -i film.ts -vcodec copy -map 0.0:0.0 -acodec copy -map 0.1:0.1 film.mkv -map 0.2:0.2 -acodec copy -newaudio FFmpeg version SVN-r22484, Copyright (c) 2000-2010 the FFmpeg developers built on Mar 13 2010 18:03:42 with gcc 4.3.3 configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 -- enable-shared --enable-gpl --enable-nonfree --enable-postproc --enable-avfilter --enable-avfilter-lavf --enable-pthreads --enable-x11grab --enable-gray -- enable-libfaac --enable-libfaad --enable-libmp3lame --enable-libtheora --enable- libvorbis --enable-libx264 --enable- libxvid libavutil 50.11. 0 / 50.11. 0 libavcodec 52.58. 0 / 52.58. 0 libavformat 52.55. 0 / 52.55. 0 libavdevice 52. 2. 0 / 52. 2. 0 libavfilter 1.17. 0 / 1.17. 0 libswscale 0.10. 0 / 0.10. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mpegts @ 0x25b43c0]MAX_READ_SIZE:5000000 reached Seems stream 0 codec frame rate differs from container frame rate: 47.95 (48000/1001) -> 23.98 (24000/1001) Input #0, mpegts, from 'film. ts': Duration: 00:04:42.74, start: 0.958300, bitrate: 31497 kb/s Program 1 Stream #0.0[0x1021]: Video: h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 23.97 fps, 23.98 tbr, 90k tbn, 47.95 tbc Stream #0.1[0x1025](eng): Audio: ac3, 48000 Hz, 5.1, s16, 640 kb/s Stream #0.2[0x1027](eng): Audio: pcm_bluray, 48000 Hz, 5.1, s16, 4608 kb/s Output #0, matroska, to 'film. mkv': Metadata: encoder : Lavf52. 55.0 Stream #0.0: Video: libx264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], q=2- 31, 1k tbn, 23.98 tbc Stream #0.1(eng): Audio: ac3, 48000 Hz, 5.1, 640 kb/s Stream #0.2(eng): Audio: 0x0080, 48000 Hz, 5.1, 4608 kb/s Stream mapping: Stream #0.0 -> #0. 0 Stream #0.1 -> #0. 1 Stream #0.2 -> #0. 2 Press [q] to stop encoding [NULL @ 0x25d0bc0]missing picture in access unit269.87 bitrate=31135. 2kbits/s frame= 6779 fps=631 q=-1.0 Lsize= 1056603kB time=282.69 bitrate=30618. 8kbits/s video:874767kB audio:181294kB global headers:0kB muxing overhead 0.051332% As you may see ffmpeg write 0x0080 instead of pcm_bluray on audio track 0.2 . Vlc cannot decode the 0.2 audio track: the displayed codec id is "undef". Any feedback are welcome. TIA

1 0

FFmpeg (VLC) h263p & H264 VBR support
by salvatore.frandina＠gmail.com 15 Mar '10

15 Mar '10

Hi, I'm new of FFmpeg. I'm using the VLC client and I would like to know how variable bit-rate mode works. I know that VLC uses FFmpeg library to encoding/transcoding of the stream video. I have noticed that only the H264 codec can use VBR parameter while H263p codec doesn't use it. If I try to change the vb parameter in VLC the output stream bitrate doesn't change. I use VLC to streaming a image over RTP protocol with the following command vlc-wrapper -I rc DummyUser_image.jpg --sout '#transcode{vcodec=H263p,fps=1,width=352,height=288,vb=100,acodec=none}:duplicate{dst=rtp{dst=196.223.177.46,port-audio=13284,port-video=14932}}' I have already requested to VLC forum but they have answered to ask the question here. Thank for your help -- _______________________________________ Salvatore Frandina website: http://frandinas.altervista.org mail: salvatore.frandina at gmail.com _______________________________________

1 0

Yuv4mpeg2 -> BMP blurring
by rulen1＠gmail.com 13 Mar '10

13 Mar '10

I'm converting a single frame Yuv4mpeg2 video with chroma subsampling of 4:4:4 to bmp. ffmpeg seems to add a lot of blending and blurring between the colors. I threw together the following Python (2.5) script that uses ffmpeg to create the bmp, then creates a bmp using my own YCbCr->RGB conversion. Mine looks a lot better. I know that values below 16 and above 235,240 are invalid, but I left them in just to see what happens. Does anyone know why ffmpeg is adding all that unnecessary blurring? Here is the ffmpeg output I get when running the script below. FFmpeg version SVN-r22107, Copyright (c) 2000-2010 the FFmpeg developers built on Feb 28 2010 06:11:15 with gcc 4.4.2 configuration: --enable-memalign-hack --cross-prefix=i686-mingw32- --cc=ccache-i686-mingw32-gcc --arch=i686 --target-os=mingw32 --enable-runtime-cpudetect --enable-avisynth --enable-gpl --enable-version3 --enable-bzlib --enable-libgsm --enable-libfaad --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libmp3lame --enable-libopenjpeg --enable-libxvid --enable-libschroedinger --enable-libx264 --enable-libopencore_amrwb --enable-libopencore_amrnb libavutil 50. 9. 0 / 50. 9. 0 libavcodec 52.55. 0 / 52.55. 0 libavformat 52.54. 0 / 52.54. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 [yuv4mpegpipe @ 01a0e070]MAX_READ_SIZE:5000000 reached [yuv4mpegpipe @ 01a0e070]Estimating duration from bitrate, this may be inaccurate Input #0, yuv4mpegpipe, from 'allycbcr.y4m': Duration: N/A, bitrate: N/A Stream #0.0: Video: rawvideo, yuv444p, 4096x4096, PAR 1:1 DAR 1:1, 15 tbr, 15 tbn, 15 tbc Output #0, image2, to 'allycbcr2rgb%d.bmp': Metadata: encoder : Lavf52.54.0 Stream #0.0: Video: bmp, bgr24, 4096x4096 [PAR 1:1 DAR 1:1], q=2-31, 200 kb/s, 90k tbn, 15 tbc Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding frame= 1 fps= 0 q=0.0 Lsize= -0kB time=0.07 bitrate= -2.6kbits/s Thanks. ---------------------------------------------------- Y4M_FILE = 'allycbcr.y4m' BMP_FROM_Y4M_FILE = 'allycbcr2rgb%d.bmp' BMP_FILE = 'allrgb.bmp' import os import array import struct WIDTH = 4096 HEIGHT = 4096 print 'Writing Yuv4mpeg2 video with 1 frame containing every possible YCbCr color' oYuvFile = open(Y4M_FILE, 'wb') oYuvFile.write('YUV4MPEG2 W'+str(WIDTH)+' H'+str(HEIGHT)+' C444 A1:1 F15:1 Ip\n') oYuvFile.write('FRAME\n') oBytePacker = struct.Struct('B') print 'Writing y' for y in xrange(256): for cb in xrange(256): for cr in xrange(256): oYuvFile.write(oBytePacker.pack(y)) print 'Writing cb' for y in xrange(256): for cb in xrange(256): for cr in xrange(256): oYuvFile.write(oBytePacker.pack(cb)) print 'Writing cr' for y in xrange(256): for cb in xrange(256): for cr in xrange(256): oYuvFile.write(oBytePacker.pack(cr)) oYuvFile.close() print 'Converting Yuv4mpeg2 frame to bmp via ffmpeg' os.system('ffmpeg -i '+Y4M_FILE+' -y '+BMP_FROM_Y4M_FILE) oPackRgb = struct.Struct('BBB') def YCbCr2BGR(y, cb, cr): r = (y - 16) * 1.164 + (cr - 128) * 1.596 g = (y - 16) * 1.164 + (cb - 128) * -0.391 + (cr - 128) * -0.813 b = (y - 16) * 1.164 + (cb - 128) * 2.018 if r < 0: r = 0 elif r > 255: r = 255 if g < 0: g = 0; elif g > 255: g = 255 if b < 0: b = 0; elif b > 255: b = 255 return oPackRgb.pack(b,g,r) print 'Manually creating equivalent bmp file' oBmpFile = file(BMP_FILE,'wb') # BITMAPFILEHEADER oBmpFile.write('BM') # bfType oBmpFile.write(struct.pack('LLL', WIDTH * HEIGHT * 3 + 14 + 40, # bfSize 0, # bfReserved1,2 14+40 )) # bfOffBits # BITMAPINFOHEADER oBmpFile.write(struct.pack('LllHHLLLLLL', 40, # biSize WIDTH, -HEIGHT, # biWidth,Height 1, # biPlanes 24, # biBitCount 0, 0, 0, 0, 0, 0 )) # biCompression, biSizeImge, # biXPelsPerMeter, biYPelsPerMeter, # biClrUsed, biClrImportant for y in xrange(256): for cb in xrange(256): for cr in xrange(256): oBmpFile.write(YCbCr2BGR(y, cb, cr)) oBmpFile.close() print 'Now compare '+BMP_FILE+' with '+(BMP_FROM_Y4M_FILE % 1)

1 0

Gamma shift using libx264
by shai＠digital-blonde.com 12 Mar '10

12 Mar '10

Hello everyone, I'm getting a serious gamma shift while using ffmpeg and libx264, I tried all the scalers available on libswscale and even tried to mess around with the colors but with no luck. The interesting thing is that when I'm using on2's flix engine the gamma shift is gone even though they are using mencoder before the vp6 encoder. Any ideas on how to solve it will be greatly appreciated :) Attached are the screenshots of the original and post encoded video: http://www.digital-blonde.com/images/original.png http://www.digital-blonde.com/images/encoded.png Thanks in advance, Shai

2 2

Where's the FLV metadata?
by robertk54＠aol.com 12 Mar '10

12 Mar '10

I am converting FLV streams using ffmpeg and libx264. The input is FLV and the output is FLV. It seems the resulting FLV stream does not contain metadata. Is there any way to get ffmpeg to propagate the metadata? If not, anyone have a suggestion as to how to do so? Thanks, Bob

2 1

Compile with --enable-pthreads error
by alexeybbb＠gmail.com 12 Mar '10

12 Mar '10

Hi, I have proplem with compiling ffmpeg with --enable-pthreads (Wnodows 7, MinGW) Get latest version ffmpeg -------------------------------------------------------------------------------- git clone git://git.ffmpeg.org/ffmpeg/ ./ mkdir build cd build ../configure --enable-memalign-hack --enable-pthreads make -------------------------------------------------------------------------------- ERROR after make: -------------------------------------------------------------------------------- ... In file included from c:\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/ pthread.h:288, from c:/ffmpeg/libavcodec/pthread.c:24: c:\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/sched.h:152: ???????+? ???: expected ')' before 'pid' c:\mingw\bin\../lib/gcc/mingw32/4.4.0/../../../../include/sched.h:154: ???????+? ???: expected ')' before 'pid' make: *** [libavcodec/pthread.o] Error 1 make: *** Waiting for unfinished jobs.... -------------------------------------------------------------------------------- config.err in attach. Please help.

1 0