November 2008 - ffmpeg-user - lists.ffmpeg.org

axis mpeg4 stream w/ aac audio
by danielp＠choma.hu 30 May '14

30 May '14

Hello, i've an Axis 247s video server which provides mpeg4 stream w/ aac audio, and i would like to get an flv stream from this. i've compiled ffmpeg/ffserver with --enable-libmp3lame --enable- shared --enable-libamr-nb --enable-nonfree --enable-gpl --enable- libfaad --enable-libfaac i can get the stream work with ffserver without audio, but not with audio. my ffserver.conf: Port 8090 BindAddress 0.0.0.0 MaxClients 1000 MaxBandwidth 1000 CustomLog - NoDaemon <Feed feed1.ffm> File /tmp/feed1.ffm FileMaxSize 1G ACL allow 127.0.0.1 </Feed> <Stream test.flv> # the source feed Feed feed1.ffm # the output stream format - FLV = FLash Video Format flv VideoCodec flv # this must match the ffmpeg -r argument VideoFrameRate 25 # generally leave this is a large number VideoBufferSize 80000 # another quality tweak VideoBitRate 500 # quality ranges - 1-31 (1 = best, 31 = worst) VideoQMin 1 VideoQMax 5 VideoSize 640x480 # this sets how many seconds in past to start PreRoll 0 AudioBitRate 64 AudioChannels 1 AudioSampleRate 44100 AudioCodec mp3 </Stream> i've tried several things like: openRTSP -b 80000 -y -c -4 -f 25 -w 640 -h 480 -t rtsp://xxx.hu:554/mpeg4/1/media.amp | \ ffmpeg -v 9 -vcodec mpeg4 -acodec mpeg4aac -ab 32k -i - -acodec libmp3lame -ar 44100 -ab 64k -ac 1 -vcodec mpeg4 http://localhost:8090/ or: mencoder \ -rtsp-stream-over-tcp rtsp://xxx.hu:554/mpeg4/1/media.amp \ -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 \ -oac mp3lame -lameopts abr:br=64:q=1:mode=3 \ -o - | \ ffmpeg \ -ab 32 -acodec mp3 -ar 44100 -ac 1 -f mpeg -r 25 -i - \ -r 25 -ab 32 -acodec mp3 -ar 44100 -ac 1 http://localhost:8090/ and tons of switches, but nothing worked. can you please help me somehow? thx, -- dp

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Frame rate and movies from images
by josh＠uncommonprojects.com 22 Jul '13

22 Jul '13

I am using ffmpeg to create movies from a directory of images. This is the command I use: ffmpeg -i imagedir/%05d.jpg -b 1800 video.mp4 This works great except that I want to be able to slow down the playback to say 6 frames per second. I tried this: ffmpeg -i imagedir/%05d.jpg -r 6 -b 1800 video.mp4 Which does playback at 6 frames per second, but what seems to be happening is that ffmpeg is also skipping frames. So if I have say 506 images in the images directory, the resulting movie uses only 123 frames. I can see where this something you might want, if you don't want the duration of the output movie to change with different frame rates, but is there a way to force it to use all the frames and extend the duration? I tried using the -vframes flag but it didn't seem to do anything: ffmpeg -i imagedir/%05d.jpg -r 6 -vframes 506 -b 1800 video.mp4 thanks, josh

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convert a sequence of images to a video file
by joshjdevl＠gmail.com 04 Oct '12

04 Oct '12

Hi, I would like to convert a series of images (png files) to a video. Would something like this work? ffmpeg -r 29.97 -i /images/picture%.png out.avi When I try the above, I get picture%d.jpg: I/O error occurred Usually that means that input file is truncated and/or corrupted. Thanks, Josh

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named pipes - > x264
by joshjdevl＠gmail.com 29 May '12

29 May '12

Hi, I was following these instructions to do a named pipe to x264 http://ffmpeg.x264.googlepages.com/piping mkfifo fifo.y4m ffmpeg -i test.mp4 -an -f yuv4mpegpipe - > fifo.y4m & x264 --quiet --crf 18 -o video.264 fifo.y4m For some reason, ffmpeg just sits here Stream mapping: Stream #0.1 -> #0.0 Press [q] to stop encoding It doesn't do any processing of test.mp4 and basically sits as a blank console. If I do something like ffmpeg -i test.mp4 -an -f yuv4mpegpipe - > test.y4m & Where test.y4m is not a named pipe, then test.y4m will end up being the yuv4 data... So I guess my question is, is there some extra option I need to compile ffmpeg or x264 with? Or is there another option I need to pass in? I tested this on Ubuntu 8.04 and centos 5.2 Thanks, Josh

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.m4a to .flv - image/video fails
by nreddig＠ptd.net 31 Mar '12

31 Mar '12

Hi all, I have greatly appreciated the information I have already gleaned from reading this forum. However I still can not solve my current problem. I am trying to convert from .m4a to .flv. These are podcast files (.m4a) built in garage band. Pictures were added as well and we would like to use this format to create weekly announcements because Garage Band is so easy for our non-technically oriented staff. Using ffmpeg the audio converts just fine but the "video" is not right. I guess it's because these files include chapter data not actual video. However when I convert it to any format the images fly through at different rates, then it seems to get stuck on a picture in the middle. The format I would like to convert to is flash so that I can easy display multiple announcement files using a flash player. I can convert .mov to .flv no problem. Converting .m4a to .mov and then .flv doesn't produce any better results. Here are the before and after files: http://www.warwicksd.org/warwick.m4a http://www.warwicksd.org/output.flv I used the following to get my conversion: ffmpeg -i warwick.m4a -b 300k -r 12 -s 300x300 -ar 22050 -y -ab 96k output.flv FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al. configuration: --enable-gpl --enable-libfaac --enable-libfaad --enable- libmp3lame --disable-vhook --enable-shared libavutil version: 49.5.0 libavcodec version: 51.44.0 libavformat version: 51.14.0 built on Oct 22 2007 15:31:25, gcc: 3.3 20030304 (Apple Computer, Inc. build 1640) Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'warwick.m4a': Duration: 00:00:55.9, start: 0.000000, bitrate: 100 kb/s Stream #0.0(eng): Audio: mpeg4aac, 44100 Hz, stereo Stream #0.1(eng): Video: mjpeg, yuvj420p, 300x300, 44100.00 fps(r) Stream #0.2(eng): Data: tx3g / 0x67337874 Stream #0.3(eng): Data: text / 0x74786574 Output #0, flv, to 'output.flv': Stream #0.0(eng): Video: flv, yuv420p, 300x300, q=2-31, 300 kb/s, 12.00 fps (c) Stream #0.1(eng): Audio: libmp3lame, 22050 Hz, stereo, 96 kb/s Stream mapping: Stream #0.1 -> #0.0 Stream #0.0 -> #0.1 Press [q] to stop encoding frame= 83 fps= 21 q=2.0 Lsize= 1099kB time=6.9 bitrate=1301.6kbits/s video:70kB audio:657kB global headers:0kB muxing overhead 51.296550% .mov files convert nicely to .flv but these .m4as are just not working. Our current staff is very eager to use these Garage Band files to communicate announcements. I have been so desperate to get this particular file type to convert that I have been experimenting with grabbing the frames every 5 secs. and then rebuilding the images into video. This produces strange results and seems to be more programming then should be necessary. Thanks in advanced for any solutions you can provide. Nancy Reddig Web Programmer Warwick SD

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video4linux2 - NTSC webcam
by knox1808＠yahoo.com 29 Jan '10

29 Jan '10

I'm hoping someone can lead me in the right direction.? I've upgraded my OLD debian to ubuntu and noticed my old-fashioned way of capturing video from my webcam doesn't work anymore.? I used to be able to call ffmpeg with: ffmpeg -vd /dev/video0 -s 320x240 test.flv I noticed that ffmpeg now requires: ffmpeg -f video4linux2 -i /dev/video0 However, I am getting errors about incorrect parameters with the following: ffmpeg -f video4linux2 -i /dev/video0 -s 320x240 -an test.flv FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al. ? configuration: --enable-gpl --enable-pp --enable-swscaler --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libogg --enable-libgsm --enable-dc1394 --disable-debug --enable-shared --prefix=/usr ? libavutil version: 1d.49.3.0 ? libavcodec version: 1d.51.38.0 ? libavformat version: 1d.51.10.0 ? built on Mar 12 2008 14:31:53, gcc: 4.2.3 (Ubuntu 4.2.3-2ubuntu4) [video4linux2 @ 0xb7fc7110]Missing/Wrong parameters /dev/video0: Error while opening file I've changed permissions to /dev/video0 with chmod g+rw /dev/video0 since I had issues like that in the past. I must be missing some newly-required parameters?? In a more recent SVN (June 22nd), I got a similar error, but it had text more like "Incorrect width, height, or rate". Any help is appreciated.

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Where can i get Gcc 4.2 for MingW ?
by sheshadri.mantha＠schange.com 02 Jun '09

02 Jun '09

Hello all; I'm getting a spurious ffmpeg crash in avformat.dll... it crashes when i terminate a udp open request - where the udp read is blocked (as there is no data coming through). the crash is intermittent... however, my application always crashes in _heap_alloc_dbg... or so VS debugger claims - the top of stack is avformat.dll 0x6c33cf94 (and apparently avformat.dll is loaded into virtual address 0x6c00000) so i'm wondering if this could be due to the stack alignment issue and wish to recompile using gcc 4.2 and having a hard time finding a official gcc4.2 site. i did find TDM's experimental site but was not sure about patches to ffmpeg that someone alluded to in one of the mail group messages... if TDM is the place to try it, is there a site that has the patch ? Or should i simply apply the diffs that was listed in one of the mail messages that pointed to the TDM's experimental site? any help is appreciated. kindest regards, shesh

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Compiling ffmpeg with extra libs without root access
by jakobdj＠gmail.com 15 Apr '09

15 Apr '09

Hi I am trying to compile ffmpeg but I don't have root privilige on the machine. I've compiled using --prefix when configuring - but the problem is that I need to use lameMp3 encoder and libamr-wb and libamr- nb. These I have installed and placed in my home dir - but how do I make sure that ffmpeg looks there when compiling. This is my problem - how do I tell ffmpeg explicitly where to look for extra libs? Kind regards, Jakob Dam Jensen

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CODEC_FLAG_TRELLIS_QUANT
by ffrank1975＠gmail.com 31 Dec '08

31 Dec '08

Hi to all, I successfully updated to the svn version my ffmpeg installation. In my old code I set a CODEC_FLAG_TRELLIS_QUANT extraflag for the mp4 format. I tried to recompile the code with the new libraries and now I can't. The flag has been removed? Where I can check these changes without be a patch developer but a normal developer? Regards, Franco

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--enable-shared and mmx
by blacktrash＠gmx.net 17 Dec '08

17 Dec '08

Hi, Any chance that --enable-shared is supported without disabling mmx in the near future (MacOS 10.5.5)? c -- \black\trash movie _C O W B O Y_ _C A N O E_ _C O M A_ Ein deutscher Western/A German Western -->> http://www.blacktrash.org/underdogma/ccc.html -->> http://www.blacktrash.org/underdogma/ccc-en.html

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