[FFmpeg-devel] [PATCH v1] filter select - avoid 2 times rounding

[Ulf Zibis]

Hi,

I have seen, that filter select sometimes doesn't catch a frame
determined by t as cause of floating point rounding. I could experience
less problems after removing 2 times rounding in filter select. I'm
aware that there still is a chance to miss a catch, but I believe it
should be much more rare.

The patch works fine e.g. with:
$ ./ffmpeg in.mp4 -vf
select='eq(t\,10.16)+eq(t\,10.2)+eq(t\,10.24)+eq(t\,10.28)+eq(t\,10.32)+eq(t\,10.36)+eq(t\,10.4)+eq(t\,10.44)+eq(t\,17.52)+eq(t\,47.96)+eq(t\,49.08)+eq(t\,49.2)+eq(t\,55.72)+eq(t\,83.0)'
-vsync vfr out_%02d.png

Without the patch the frame for eq(t\,10.2) was missing.

-Ulf

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