Am Mo., 8. März 2021 um 23:32 Uhr schrieb Anders Degerberg <[email protected]>: > > On Mon, Mar 8, 2021 at 10:44 PM Carl Eugen Hoyos <[email protected]> wrote: > > > Just to make sure that our assumption that this would need > > changes in libswscale is correct, please also test the following: > > -pix_fmt yuv444p16 -vcodec rawvideo -an -f null - > > -i "Decklink ..." -an -f null - > > and compare the speed (or fps) indicator. > > Hi Carl Eugen, > thanks for looking into this, and my apologies for the top-posting mistake. > > - With pix_fmt yuv444p16 and rawvideo, auto_scaler engages, and I get > 15fps/0.6x. One cpu thread at 100%, a few other threads around 10-20%. > - Without changing pix_fmt, passing on the rgb data straight to null > pipe, I get full framerate, 25fps/1x. One or two cpu-threads around > 20-40%.
This shows that the assumption was correct, libswscale is the culprit. Carl Eugen _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
