April 2008 - ffmpeg-user - lists.ffmpeg.org

.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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resize and imlib2 vhook in one command ?
by code＠u-turnmedia.com 02 Oct '08

02 Oct '08

hi, i would like to resize video and overlay with image. when i resize video, e.g. from 624x352 to 320x240, and use imlib2 vhook in one line, i get 320x240 video with small picture in the corner: ffmpeg -i infile.avi -cropright 52 -cropleft 52 -s 320x240 -aspect 1.333 -vhook './imlib2.so -x 0 -y 0 -i image.png' outfile.avi i know that options for imlib2 are -x -y for coordinates, and i would like to know how to use """ Expressions are functions of these variables: N frame number (starting at zero) H frame height W frame width h image height w image width X previous x coordinate of text or image Y previous y coordinate of text or image """ precisely, how do i tell to the image to keep the same size ? do i have to use two commands ? like in first command resize video, and in second use vhook ? thanks Co.De. --

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ffmpeg and rtsp
by vmrsss＠gmail.com 13 May '08

13 May '08

Hello, Is a command line like the one below supposed to work? Does "unsupported network protocol" means I have forgotten to link in some library? Or is it more serious? Thanks. ffmpeg -i rtsp://rmlive.bbc.co.uk/bbc-rbs/rmlive/ev7/live24/radio4/live/r4_dsat_g2.ra test.ogg FFmpeg version SVN-r12910, Copyright (c) 2000-2008 Fabrice Bellard, et al. configuration: --cc=gcc --enable-shared --enable-nonfree --disable- ffserver --disable-gprof --disable-debug --enable-gpl --enable-libx264 --enable-libxvid --enable-libfaac --enable-libfaad --enable-liba52 -- enable-libtheora --enable-libamr-wb --enable-libmp3lame --enable- libamr-nb --enable-libgsm --enable-pthreads --enable-swscale --enable- postproc --extra-libs=-L/usr/X11R6/lib -lX11 -dylib_file /System/ Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/ System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/ libGL.dylib -L/sw/lib --extra-cflags=-I/sw/include libavutil version: 49.6.0 libavcodec version: 51.55.0 libavformat version: 52.13.0 libavdevice version: 52.0.0 built on Apr 20 2008 15:12:57, gcc: 4.0.1 (Apple Inc. build 5470) (Aspen 5470.3) rtsp://rmlive.bbc.co.uk/bbc-rbs/rmlive/ev7/live24/radio4/live/r4_dsat_g2.ra : Unsupported network protocol

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How to modify FLV key frame interval with FFmpeg?
by foxg＠hz.webex.com 06 May '08

06 May '08

Hi, Can you help me? How to modify FLV key frame interval use FFmpeg tool when conversion other format file(such as avi/wav/flv) to FLV file? Thanks! -Fox

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I might have more than 1 install
by jshupert＠pps-inc.com 06 May '08

06 May '08

I get an error on shared Libraries - I wonder if I might , accidentally have more than 1 install of ffmpeg. Is there a command I can run to see where ffmpeg is installed and if therefore, there is more than 1. Thanks the problem I am having is this: I got back : error while loading shared libraries : libavdevice.so.52: cannot open shared object file: No such file or directory so if I attempt to just get some file info ( the simplest thing I can think of ) i enter :: ffmpeg -i /home/jj/icef.mpg I get back ffmpeg: error while loading shared libraries : libavdevice.so.52 : cannot open shared object file : no such file or directory and of course there IS a file at that location so.....my question is How do I resolve a shared lib problem ? Note : I edited /etc/ld.so.conf and added the line /usr/local/lib at the end then ran ldconfig -v Thanks again jim

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ffmpeg -r and Flash video
by rhubarbpie＠poetworld.net 06 May '08

06 May '08

I have an Animation.gif I've converted to Flash using "ffmpeg -f gif -i Animation.gif -f swf -y Animation.flv". Although Animation.flv works, it's too fast. I've attempted the "-r" option without success; the speed doesn't change. For instance, "ffmpeg -f gif -i Animation.gif -f swf -r 10 -y Animation.flv" plays at the same speed as "ffmpeg -f gif -i Animation.gif -f swf -r 20 -y Animation.flv". I can change the speed of Animation.gif converted to avi format (Animation.avi) using the "-r" option. I know very little of video formats, but my animation shows a simple moving part and I'd like the freeze/resume feature of Flash. What am I doing wrong? Is there a better option for freeze/resume?

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Mpeg2 quality with bitrate around 4Mbit/s
by gujs.lists＠gmail.com 05 May '08

05 May '08

Hello, I need help to convert DVD files into mpeg2 at 4Mbit/s of bitrate. I have a problem with quality when I try to do that. Here is my command for that: ffmpeg -i VTS_03_1.vob -vcodec mpeg2video -me_method full -me_range 16 -mbd 2 -g 15 -b 4000000 -qmin 2 -qmax 31 -bufsize 1835000 -minrate 4000000 -maxrate 4000000 -s 720x576 -aspect 16:9 -deinterlace -bf 2 -psnr -ab 224000 -acodec mp2 VTS_03_1.mpg With this settings I see a lot of corruption on fast moving scenes, and when I have black background and white text over it on a movie, the text is blinking. Please someone help me find good setting to encode mpeg2 with best possible quality at 4Mbits with very little bitrate variability (+- 250kBits). Best Regards, Gregor

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lpcm audio not recognized
by jer20＠rogers.com 04 May '08

04 May '08

I've got an MPEG2 file from a client. What I'm trying to do is convert it to FLV which I have working with other files. However it seems with this MPEG2 it's not recognizing the audio. I've used VLAN to playback to confirm audio is actually there. I used GSPOT Codec Confirmation Application to confirm it's an MPEG-2 Program Stream (says it's in DVD VOB format which I'm not too sure what that means). The audio is labelled as DVD_LPCM_AUDIO. When I run it through FFMPEG it doesn't give me any errors, it encodes just without audio. It's not seeming to find the audio stream. I'm trying to get info from the client about how they specifically created this file. Any thoughts? thanks

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encoder 'h264'
by hipadilla＠gmail.com 03 May '08

03 May '08

Hello I'am a newbe in linux (ubutu) and i try to install a ffmpeg i would to encode videos in h264 format .mov but when a try to encode i have a error: Unknown encoder 'h264' and i want to enable the library ./configure --enable-libx264 I get the error: If you think configure made a mistake, make sure you are using the latest version from SVN. If the latest version fails, report the problem to the ffmpeg-user at mplayerhq.hu mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file "config.err" produced by configure as this will help solving the problem. dev at SUKI:/usr/lib/ffmpeg$ ./configure --enable-libx264 libx264 is under GPL and --enable-gpl is not specified. If you think configure made a mistake, make sure you are using the latest version from SVN. If the latest version fails, report the problem to the ffmpeg-user at mplayerhq.hu mailing list or IRC #ffmpeg on irc.freenode.net. Include the log file "config.err" produced by configure as this will help solving the problem. I really need your hep! thank you (sorry for my english)

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ffmpeg compilation problem
by mhjamal_ps＠yahoo.com 03 May '08

03 May '08

Hi I am compiling ffmpeg on CentOS 5 and trying to configure with following add-ons. ./configure --enable-mp3lame --enable-amr_nb --enable-amr_nb-fixed \ --enable-amr_wb --enable-amr_if2 --enable-faad --enable-faadbin \ --enable-gpl --enable-faac i have used following two versions of ffmpeg 1. 13019 2. 7332 Every time i try to configure it gives me following error ERROR: libfaad not found Although i have already installed faad and it is available here locate faad /usr/bin/faad /usr/include/faad.h /usr/lib64/libfaad.so /usr/lib64/libfaad.so.0 /usr/lib64/libfaad.so.0.0.0 Can you please provide me some help to resolve the issue. Thanks --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

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