ffmpeg
https://nicehuster.github.io/2020/03/26/ffmpeg/
https://blog.51cto.com/fengyuzaitu/2801172
- installation https://cloud.tencent.com/developer/article/1711770
合成视频
# img2video
ffmpeg -r 24 -f image2 -i cur_frame_%d.jpg out.mp4
ffmpeg -threads 2 -y -r 1 -f image2 -i cur_frame_%d.jpg -r 24 -vcodec mpeg4 -b:v 6000k out.mp4
# video2gif
ffmpeg -ss 00:00:00.000 -i out.mp4 -pix_fmt rgb24 -r 30 -s 320x240 output.gif
# mp4 to yuv
ffmpeg -i Walkers.mp4 Walkers.yuv -pix_fmt yuv420p -s 1280x760
# format
-pix_fmt yuv420p
-pix_fmt nv12
-pix_fmt rgb24 
