[FFmpeg-devel] Statistics pseudo-formats
Thu Sep 24 20:34:39 CEST 2009
I was wondering if ffmpeg developers would consider the addition of pseudo
formats that actually compute statistics.
ffmpeg -i some-file.ogg -f stats-volume -
would just print volume statistics for the input file.
This would be especially useful for computations that work on several
streams at once, like quality computations:
-i source-file.mpeg \
-i target-file.h264 \
-f stats-video-quality - \
-newvideo -map 0.0:0.0 -map 1.0:0.1
which are much harder to do with simple pipelines, even more so if the
streams are read from a single device (example: correlation statistics
between the audio channels of a bilingual DVB program).
There are at least two such pseudo formats I would like to submit (audio
volume and down-mixing coefficients detection), but I would rather not waste
time implementing the link to lavf API if they would be rejected on
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