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| author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2008-10-05 09:45:54 +0000 |
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| committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2008-10-05 09:45:54 +0000 |
| commit | 4a60e574bbc7e3a752098c83ce9c4fee0cd30b6d (patch) | |
| tree | 207ce12782c0273474173a956a56d4058bb1fd30 /doc/ffmpeg-doc.texi | |
| parent | 5b9ce252a9c4f512948a586bd3854ee7c0c67632 (diff) | |
| download | ffmpeg-4a60e574bbc7e3a752098c83ce9c4fee0cd30b6d.tar.gz | |
Document the preset files system.
Originally committed as revision 15563 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/ffmpeg-doc.texi')
| -rw-r--r-- | doc/ffmpeg-doc.texi | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/doc/ffmpeg-doc.texi b/doc/ffmpeg-doc.texi index 10bfc54059..a8f177c0f0 100644 --- a/doc/ffmpeg-doc.texi +++ b/doc/ffmpeg-doc.texi @@ -780,6 +780,40 @@ Set the maximum demux-decode delay. Set the initial demux-decode delay. @end table +@section Preset files + +A preset file contains a sequence of @var{option}=@var{value} pairs, +one for each line, specifying a sequence of options which would be +awkward to specify on the command line. Lines starting with the hash +('#') character are ignored and are used to provide comments. Check +the @file{ffpresets} directory in the FFmpeg source tree for examples. + +Preset files are specified with the @code{vpre}, @code{apre} and +@code{spre} options. The options specified in a preset file are +applied to the currently selected codec of the same type as specified +by the preset option. + +The argument passed to the preset options identifies the preset file +to use according to the following rules. + +First ffmpeg searches for a file named @var{arg}.ffpreset in the +directories @file{$HOME/.ffmpeg}, @file{/usr/local/share/ffmpeg} and +@file{/usr/share/ffmpeg} in that order. For example, if the argument +is @code{libx264-max}, it will search for the file +@file{libx264-max.ffpreset}. + +If no such file is found, then ffmpeg will search for a file named +@var{codec_name}-@var{arg}.ffpreset in the above-mentioned +directories, where @var{codec_name} is the name of the codec to which +the preset file options will be applied. For example, if you select +the video codec with @code{-vcodec libx264} and use @code{-vpre max}, +then it will search for the file @file{libx264-max.ffpreset}. + +Finally, if the above rules failed and the argument specifies an +absolute pathname, ffmpeg will search for that filename. This way you +can specify the absolute and complete filename of the preset file, for +example @file{./ffpresets/libx264-max.ffpreset}. + @node FFmpeg formula evaluator @section FFmpeg formula evaluator |