I want use ffmpeg to encode MJPEG -> h265. I need use some thread amount. For example 10 threads.
But my code use all cores of my CPU... Why it ignore numa-pools?
ffmpeg -loglevel verbose -i v.raw -pix_fmt yuv420p -c:v libx265 -vtag hvc1 outf.mp4 -x265-params numa-pools="10"
ffmpeg says:
...
x265 [info]: Thread pool created using 16 threads
...
It is true. I also can see that all my cores are busy in htop.
This code use all cores of my CPU too...
ffmpeg -loglevel verbose -threads 1 -i v.raw -pix_fmt yuv420p -c:v libx265 -vtag hvc1 outf.mp4 -x265-params numa-pools="10"
$ ffmpeg --version
ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
I have raw MJPEG video file. 3840x2160, 25fps, YUYV 4:2:2. I got it this way. (Now I set stream-count=2 to decrease size of my file for users, usually I set 1000)
v4l2-ctl --device=/dev/video0 --set-fmt-video=width=3840,height=2160,pixelformat=MJPG --stream-mmap --set-parm=25 --stream-to=v.raw --stream-count=2
Here you can download v.raw
P.S. I also try drop ffmpeg and use x265 cli directly, but... What is outf.hevc? No one player can open this...
x265 --input v.raw --fps 25 --input-res 3840x2160 --output outf.hevc
ffmpeg arguments can often be order-specific. Right code:
ffmpeg -loglevel verbose -threads 1 -i v.raw -pix_fmt yuv420p -c:v libx265 -x265-params numa-pools="10" -vtag hvc1 f25_1000.mp4
says x265 [info]: Thread pool created using 10 threads
Thanks user Rogue.