[FFmpeg-user] User Question: resize and pix_fmt
millerx at live.com
Sat Sep 23 08:17:17 EEST 2017
i have a question about -s and -pix_fmt
the raw video is 8K yuv420 , and i want get 4K 444
so i use this :
-s 3840x2160 -pix_fmt yuv444p
as we know 420 have half resolution ， 8k have 4k UV channel
what ffmpeg will do when resize ?
keep raw 4k UV channel with downscaled Y channel
down UV to 2K them save them in upscale 4K ?
I don't know how to code , so i cant figure this question through source code even its the best way
Thanks for help .
by the way , can yuv4mpegpipe use yuv444p mode ? i failed when try
-s 3840x2160 -pix_fmt yuv444p -f yuv4mpegpipe - | xxx xxx xxx xxx xxx xxx
Sorry I'm not native english useer . sorry for grammar error
And this is my first time use mail list , sorry for disturb ， i used post on forums .
And is that the correct way to use a mail list ?
More information about the ffmpeg-user