[FFmpeg-devel] [PATCH]Set sample_aspect_ratio in real demuxer
Carl Eugen Hoyos
cehoyos at ag.or.at
Thu Dec 20 11:38:25 CET 2012
Nicolas George <nicolas.george <at> normalesup.org> writes:
> Le nonidi 29 frimaire, an CCXXI, Carl Eugen Hoyos a écrit :
> > New patch attached, I tested with several samples (with different
> > dar), with the patch the display aspect ratio is correctly shown
> > (it is unknown without).
> I believe this is wrong.
> With the patch, for
> I get the following ffprobe -show_streams -show_frames output:
> which is obviously wrong.
Isn't this an independent bug?
What I want to fix is that ffmpeg -i file shows
"unknown DAR" while it is actually known.
(Imo, there is also a bug in ffplay that ignores
the stream DAR on resolution changes.)
> I believe what happens is this: the resolution stored in
> the format is the "display resolution", i.e. the display
> aspect ratio with useless common factors. When it is the
> same as the frames resolution, it means SAR=1 and that works.
Do you think there is a situation where is does not work?
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