[FFmpeg-devel] [PATCH] avfilter: Add delay filter

[Meredydd Luff]

So far, we have an audio delay filter (adelay), but no video delay.
This patch adds one.

(NB the difference with tpad - tpad does not alter the pts of the
passed-through frames, which causes A/V sync badness with large delays
[at least when running live]. delay uses a circular buffer of frames,
and emits each delayed frame with the pts of the frame that replaced
it in the buffer.)

Meredydd
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