On Sat, Sep 21, 2019 at 03:13:46PM +0200, Carl Eugen Hoyos wrote: > Am Sa., 21. Sept. 2019 um 14:42 Uhr schrieb <lance.lmw...@gmail.com>: > > > > From: Limin Wang <lance.lmw...@gmail.com> > > > > With the patch, we simply reuse the same source chroma line for each pair > > of lines in the output > > Is there really no quality hit for a 20% speed-up?
The quality is OK by my testing for the 420 to 422, I have no idea how to compare with the difference between them, Micheal can give more suggestion on that. however the patch try to fix the autoscale, if user prefer to use swscale conversion, he can use it still by claims pix_fmt clearly. The following command shows how to use the old conversion by swscale. no swscale: ./ffmpeg -y -lavfi testsrc2=s=4096x3072:r=10:d=10,format=pix_fmts=yuv420p -c:v v210 -f null - swscale: ./ffmpeg -y -lavfi testsrc2=s=4096x3072:r=10:d=10,format=pix_fmts=yuv420p -c:v v210 -pix_fmt yuv422p -f null - Thanks, Limin > > Carl Eugen > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
