[FFmpeg-user] Smooth FPS change via ffmpeg

[Carl Eugen Hoyos]

Am Mo., 23. Sept. 2019 um 23:04 Uhr schrieb Michael Koch
<astroelectronic at t-online.de>:

> ffmpeg -f lavfi -i testsrc2=size=vga:duration=10:rate=20 -lavfi
> "setpts='(20-sqrt(400-2*N))/TB' " -y out.mp4

(Does this syntax really work?)

As said before, our mp4 muxer does not (correctly) support
constant frame rate.

Carl Eugen