April 2010 - ffmpeg-user - lists.ffmpeg.org

is ffmpeg new version from svn doesn't support FLV
by amitkumarmangal＠gmail.com 29 Apr '10

29 Apr '10

Hi Is ffmpeg new version from svn doesn't support flv conversion? means can i convert from any format to flv with this new version on svn ?

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H264 with multiple conf. records [was: why ffmpeg fails here?]
by openworld＠uralweb.ru 29 Apr '10

29 Apr '10

Hi, All, In followup to my previous message: That particular failure occurs for the file specifics. Probably the video itself has some defects. Now I've found another video sample, which doesn't cause ffmpeg failure, but the encoded result is invalid starting from the second AVC configuration records. So, it's just the case. Here is the test FLV file: http://home.bokovikov.com/ffmpeg/test.flv Here is the log file: http://home.bokovikov.com/ffmpeg/out.log Could anybody take a look here and tell me at least if it is possible to load every AVC configuration record as soon as it is met in the source file? Thanks in advance.

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Non monotone timestamps
by pscientist＠inbox.com 29 Apr '10

29 Apr '10

I have been sent a movie which plays nicely on my WD media player, except that it can't handle the 5.1 sound; so I'm trying to downgrade this to stereo without altering the video stream at all. Does anyone have any idea how to fix this? I don't really care about 'non monotone timestamps' (I assume it actually means non-monotonic timestamps???) because my media player apparently doesn't care. C:\Documents and Settings\Andy\My Documents\>C:\FFmpeg\bin\ffmpeg -i input.mkv -vcodec copy -acodec libmp3lame -ac 2 -ab 128000 -vframes 1000 -y output.mkv FFmpeg version SVN-r22986, Copyright (c) 2000-2010 the FFmpeg developers built on Apr 28 2010 06:04:46 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 --e nable-avisynth --enable-gpl --enable-version3 --enable-bzlib --enable-libgsm --e nable-libfaad --enable-pthreads --enable-libvorbis --enable-libtheora --enable-l ibspeex --enable-libmp3lame --enable-libopenjpeg --enable-libxvid --enable-libsc hroedinger --enable-libx264 --enable-libopencore_amrwb --enable-libopencore_amrn b libavutil 50.14. 0 / 50.14. 0 libavcodec 52.66. 0 / 52.66. 0 libavformat 52.61. 0 / 52.61. 0 libavdevice 52. 2. 0 / 52. 2. 0 libswscale 0.10. 0 / 0.10. 0 [matroska @ 0194c270]Estimating duration from bitrate, this may be inaccurate Seems stream 0 codec frame rate differs from container frame rate: 47.95 (200000 00/417083) -> 24.00 (24/1) Input #0, matroska, from 'input.mkv': Duration: 00:39:54.50, start: 0.000000, bitrate: N/A Stream #0.0(eng): Video: h264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 24 tbr , 1k tbn, 47.95 tbc Stream #0.1(eng): Audio: dca, 48000 Hz, 6 channels, s16 Output #0, matroska, to 'output.mkv': Metadata: encoder : Lavf52.61.0 Stream #0.0(eng): Video: libx264, yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], q=2 -31, 1k tbn, 23.98 tbc Stream #0.1(eng): Audio: libmp3lame, 48000 Hz, 2 channels, s16, 128 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Press [q] to stop encoding [matroska @ 01f40050]st:0 error, non monotone timestamps 21 >= 0 av_interleaved_write_frame(): Error number -1 occurred -- Peter ____________________________________________________________ FREE 3D EARTH SCREENSAVER - Watch the Earth right on your desktop! Check it out at http://www.inbox.com/earth

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How to activate postprocessing
by Dominik.Holler＠gmx.net 28 Apr '10

28 Apr '10

Hi is ffmpeg able to use post processing filters like ffmpeg2theora does? E.g. can ffmpeg denoise with the TEMP_NOISE_FILTER of libpostproc/postprocess.c, like it is activated via a "--pp tn" on a ffmpeg2theora invocation? I have done some research on this question, but without any success, so I am glad for every kind of response. Dominik -- dominik.holler at gmx.net || PGP Key ID: FDEF2A0B

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Integration of libgsm into FFmpeg.
by anil_jangam＠persistent.co.in 28 Apr '10

28 Apr '10

Hi list, Can you please elaborate on integration of libgsm to FFmpeg base version? We have the sources for libgsm from this link (https://launchpad.net/ubuntu/lucid/+source/libgsm) and have compiled it successfully. However it generates only .a file. When tried integrating it with FFmpeg with '--enable-libgsm' option, and using '--extra-cflags=-I<path to libgsm.a>', it fails to detect/locate the file, and 'configure' command fails. Has anyone integrated the libgsm to FFmpeg before, and any pointers to the correct way to integrate it would help greatly. Thanks in adv. /anil. DISCLAIMER ========== This e-mail may contain privileged and confidential information which is the property of Persistent Systems Ltd. It is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, you are not authorized to read, retain, copy, print, distribute or use this message. If you have received this communication in error, please notify the sender and delete all copies of this message. Persistent Systems Ltd. does not accept any liability for virus infected mails.

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error in compiling ffmpeg code on windows
by amitkumarmangal＠gmail.com 28 Apr '10

28 Apr '10

Hi i am trying t ocompile latest code from svn on windows platform. i have installed cygwin from internet and then try to run the command ./configure --enable-memalign-hack and i am getting error. ./configure --enable-memalign-hack ./configure: line 9: $'\r': command not found ': not a valid identifierort: `LC_ALL ./configure: line 13: $'\r': command not found ./configure: line 16: $'\r': command not found ./configure: line 17: syntax error near unexpected token `$'{\r'' '/configure: line 17: `try_exec(){

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Seeking by byte position and muxing
by sun_radha＠yahoo.com 28 Apr '10

28 Apr '10

Hi All, I am not sure if some one tried this earlier. I am trying a stream copy by seeking to a byte position of a key frame and write packets to a mpeg-ts container. One problem is that the first few audio/video packets read after byte position seek come with a av_nopts_value in both pts and dts fields. Another thing is even if I manage to set the pts,dts to correct values and write the packets to respective streams, the video is not playing. Following is a brief description of the program flow. 1. Read the input mpeg file 2. Initialize the output format, streams and codec context (based on the input) 3. Read packets from input file and write to the output file. Am I missing something, any ideas please share. Thanks Sen

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Why ffmpeg fails here?
by openworld＠uralweb.ru 28 Apr '10

28 Apr '10

Hi, All, I'm getting a problem in h264 decoder when more than one AVC configuration record appears in the source FLV file. I'm not a ffmpeg developer indeed, but it looks strange for me, why not to read every configuration record (but not the first only) and update decoding config data? Is it so hard? Or is it out of interest for developers? Could anybody try to fix this problem? BTW, it looks like this is just a video decoder problem. As for AAC audio decoder, it looks like it is working OK when several AAC initialization records are met. Here is a source file sample: http://home.bokovikov.com/ffmpeg/test.flv Here is a log file where you can see my ffmpeg build data: http://home.bokovikov.com/ffmpeg/out.log I could provide any other information if it could help. FYI: Flash Player plays such file without a problem from the beginning up to the end, but it fails to seek back over the boundary between fragments, encoded with different configuration records, what is absolutely not strange. Thanks in advance.

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convert .xspf movie file .mov
by amitkumarmangal＠gmail.com 28 Apr '10

28 Apr '10

Please any one tell me command to convert .xspf movie file to .mov ? i am able to play this .xspf movie file to VLC media player but i am not able to play it using ffplay. then i try to convert this file in to .mov format then i get error unknown format. Thanks in advance

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AV_NOPTS_VALUE after seeking by byte position
by sun_radha＠yahoo.com 28 Apr '10

28 Apr '10

Hi All, I was wondering if some one can give an idea. First few packets read after av_read_frame with byte position come with invalid pts, dts (AV_NOPTS_VALUE) time stamps. Is there a way to fix this. Thanks Sen

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