Am 23.09.2019 um 23:07 schrieb Carl Eugen Hoyos:
Am Mo., 23. Sept. 2019 um 23:04 Uhr schrieb Michael Koch
<astroelectro...@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.
you mean it doesn't support variable framerate, right?
Well, the syntax gives no error message, the resulting video has a
constant framerate of 20 and the speed changes from normal to slow
motion. But the length is not as expected.
Michael
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