[FFmpeg-user] xfade and acrossfade

Paul B Mahol onemda at gmail.com
Fri Jan 31 20:09:35 EET 2020

On 1/31/20, Michael Koch <astroelectronic at t-online.de> wrote:
> Paul,
> is there any chance that the new xfade filter and the acrossfade filter
> could be harmonized, so that they accept the same parameters?
> The acrossfade filter does always fade near the end of the first input
> stream. Only the duration must be specified.
> The xfade filter expects a duration and an offset. If you want to fade
> near the end of the first stream, you have to know its length.
> I prefer the behaviour of acrossfilter because it's unnecessary to know
> the length.
> If you want the video fade earlier in the stream, the trim filter could
> be used before xfade.

Nope, because storing 1000 frames (duration of transition) in RAM is not free.

> Michael
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