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  1. im trying to convert audio in an mp4 video

    the video is avc, the audio is ac3

    im trying to get a new mp4 file with the same video codec, but converted audio to wav

    i used this command
    Code:
    ffmpeg -i input.mp4 -vcodec copy -acodec pcm_s16le output.mp4
    i get this error
    Code:
    Could not write header for output file #0 (incorrect codec parameters ?)
    maybe i should give the whole command line output

    Code:
    FFmpeg version SVN-r18709, Copyright (c) 2000-2009 Fabrice Bellard, et al.
      configuration: --enable-memalign-hack --prefix=/mingw --cross-prefix=i686-ming
    w32- --cc=ccache-i686-mingw32-gcc --target-os=mingw32 --arch=i686 --cpu=i686 --e
    nable-avisynth --enable-gpl --enable-zlib --enable-bzlib --enable-libgsm --enabl
    e-libfaac --enable-libfaad --enable-pthreads --enable-libvorbis --enable-libtheo
    ra --enable-libspeex --enable-libmp3lame --enable-libopenjpeg --enable-libxvid -
    -enable-libschroedinger --enable-libx264
      libavutil     50. 3. 0 / 50. 3. 0
      libavcodec    52.27. 0 / 52.27. 0
      libavformat   52.32. 0 / 52.32. 0
      libavdevice   52. 2. 0 / 52. 2. 0
      libswscale     0. 7. 1 /  0. 7. 1
      built on Apr 28 2009 04:04:42, gcc: 4.2.4
    
    Seems stream 0 codec frame rate differs from container frame rate: 47.95 (48000/
    1001) -> 23.98 (24000/1001)
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\Stuff\Toy Story 1995 2010 Trilogy Bl
    uray 720p x264 ac3\Toy Story 1 1995.mp4':
      Duration: 01:21:03.44, start: 0.000000, bitrate: 2387 kb/s
        Stream #0.0(und): Video: h264, yuv420p, 1280x720, 23.98 tbr, 90k tbn, 47.95
    tbc
        Stream #0.1(eng): Audio: ac3, 48000 Hz, stereo, s16
    [mp4 @ 0x13acff0]track 1: could not find tag, codec not currently supported in c
    ontainer
    Output #0, mp4, to 'D:\Stuff\Toy Story 1995 2010 Trilogy Bluray 720p x264 ac3\to
    ystory1.mp4':
        Stream #0.0(und): Video: libx264, yuv420p, 1280x720, q=2-31, 48k tbn, 23.98
    tbc
        Stream #0.1(eng): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Stream mapping:
      Stream #0.0 -> #0.0
      Stream #0.1 -> #0.1
    Could not write header for output file #0 (incorrect codec parameters ?)
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  2. Member
    Join Date
    Sep 2007
    Location
    Europe
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    You've missed a earlier message in the FFmpeg output ...

    Code:
    [mp4 @ 0x13acff0]track 1: could not find tag, codec not currently supported in container
    This means PCM audio in mp4 container is not supported.
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  3. what would be the best uncompressed audio format to convert to. i plan on editing the video in sony vegas, and when i imported the original video, only the video was imported.
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  4. Member
    Join Date
    Sep 2007
    Location
    Europe
    Search PM
    Originally Posted by Thunderhead2772 View Post
    what would be the best uncompressed audio format to convert to. i plan on editing the video in sony vegas, and when i imported the original video, only the video was imported.
    Only PCM audio is uncompressed. You could try to mux it in a mov container.

    Code:
    ffmpeg -i input.mp4 -vcodec copy -acodec pcm_s16le output.mov
    You may need to update your FFmpeg version.

    http://oss.netfarm.it/mplayer-win32.php

    You also need to download the faac encoder dll (also on that webpage) and put it together with FFmpeg.
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  5. Thanks a lot Chris K.
    your post helps me too much. thanks you. hope someone will be help.
    Quote Quote  



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