On 4/21/20, Michael Koch <astroelectro...@t-online.de> wrote: > >>> I now appreciate that 'blend' has a "preferred" input similar to >>> 'overlay', >>> but that behavior is not >>> documented. In the case of 'overlay', the name "main" doesn't convey that >>> meaning, and in the case >>> of 'blend', that behavior is not documented at all. Both documentations >>> should explain how >>> timestamps control output and that the 1st filter-input's timestamp >>> determines the filter-output's >>> timestamp. >> Blend filter does not have preferred input since long time. > > If the blend filter gets two input frames with different timestamps, > then what's the timestamp of the output frame? > I can think ot at least 5 possible scenarios: > -- timestamp is copied from the first input > -- copied from the second input > -- the smaller of the two timestamps > -- the larger of the two timestams > -- the artihmetic mean of the two timestamps >
It is discouraged to use blend in such case. Inputs must have same timestamps anyway I you wish to do anything useful. Also timebase is picked from framesync. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".