FFmpeg将多张图片合成视频 - CSDN博客 https://blog.csdn.net/wangshuainan/article/details/77914508
Slideshow – FFmpeg https://trac.ffmpeg.org/wiki/Slideshow
多线程
15帧每秒 且 每5秒切换图片 === 独立
./ffmpeg -y -threads 5 -loop 1 -r 0.5 -i /tmp/image%04d.jpg -i concat:"{}" -pix_fmt yuv420p -vcodec libx264 -b:v 300k -r:v 15 -preset medium -crf 30 -s 1200x414 -t {} {}
子视频合并
.\ffmpeg.exe -i "concat:a.avi |b.avi | c.avi " -acodec copy test.mp4
.\ffmpeg.exe -i "concat:a.avi |b.avi | c.avi " -acodec copy test.avi