All the same, with estate of instructions on the Internet, on forums, I have this problem.
ffmpeg -y -i input.mp4 -vcodec libvpx-vp9 -crf 31 -minrate 1500k -maxrate 4350k -pix_fmt yuv420p10le -colorspace 9 -slices 4 -color_range 2 -tile-columns 2 -quality good -g 240 -c:a libopus -b:a 128k -pass 1 NUL && ^ ffmpeg -i input.mp4 -vcodec libvpx-vp9 -crf 31 -minrate 1500k -maxrate 4350k -pix_fmt yuv420p10le -colorspace 9 -color_range 2 -tile-columns 3 -slices 4 -quality good -g 240 -map_metadata:g -1 -map_metadata:s:v -1 -map_metadata:s:a -1 -map_chapters -1 -c:a libopus -b:a 128k -pass 2 output.mp4
I am a windows user. Most people use ffmpeg on Linux, so the two-pass encoding uses /dev / null
. I'm not interested, because on windows it does not work. Read as the instruction on trac-page ffmpeg (trac.ffmpeg.org). It says:
Note. Windows users should use NUL instead of / dev / null and ^ instead of \ .
But it didn't help. I used:
NUL
NULL
/dev/NUL
/dev/NULL
but to no avail. It seems I am disappointed, never fully immersed in the study of ffmpeg. (recently only began his explore).
There is the same theme, there also say you need to use NUL.(Click)
Screens(I not have 10 rep):
1 Screen
2 Screen
I ask for the help of professionals in this case.Or still, will have to torment the emulator...