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  1. Hi,
    I have a strange problem with my video conversion.
    I try to generate a mov file from dpx images.
    On windows I use this command line:
    Code:
    ffmpeg.exe -y -f image2 -i %1 -r 25 -sameq -vcodec mjpeg %2
    And on linux I use the slightly different:
    Code:
    ffmpeg -y -f image2 -i $1 -r 25 -q:a 1 -vcodec mjpeg $2
    The only difference is that I use -q:a in place of -sameq because linux version of ffmpeg didn't accept -sameq and told me to use -q:a instead.

    It generates the video correctly in windows. And in linux, it generates the video but with small purple dashes on the bottom of the video.

    Do someone has an idea of why it would do such a thing ?
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  2. Member bat999's Avatar
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    Originally Posted by elanari View Post
    Do someone has an idea of why it would do such a thing ?
    Hi
    Probably because they are different versions of FFmpeg.
    Check them like this:-
    Code:
    $ ffmpeg
    ffmpeg version git-2012-11-19-c44a028
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  3. I'm a MEGA Super Moderator Baldrick's Avatar
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    Isn't -q:a the audio quality in latest ffmpeg?

    Code:
    ‘-aq q (output)’
    Set the audio quality (codec-specific, VBR). This is an alias for -q:a.
    What is the ffmpeg version you are using in linux?
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  4. Indeed, the versions seem different.
    On windows ffmpeg.exe -version gives me :
    Code:
    FFmpeg version SVN-r23008, Copyright (c) 2000-2010 the FFmpeg developers
    built on May  2 2010 06:07:24 with gcc 4.4.2
    On linux it gives me:
    Code:
    ffmpeg version N-46898-gc44a028
    built on Nov 19 2012 17:08:42 with gcc 4.4.6 (GCC) 20120305 (Red Hat 4.4.6-4)

    So the older version works better than the new one ? ^^
    I installed ffmpeg on linux with the git repository (using this tutorial http://ffmpeg.org/trac/ffmpeg/wiki/CentosCompilationGuide) Do you know how I can revert to an older version ?
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  5. Isn't -q:a the audio quality in latest ffmpeg?
    Yes I realised that after, I also tried with -q:v which should be the video quality. It gives me the same result.
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