ffmpeg 在末尾添加重复帧及渐变效果

ffmpeg -i AdCenter037d275a82abd4a2905e62d45a7bf09e347a79677.mp4 -vf tpad=stop_mode=clone:stop_duration=1 out.mp4
ffmpeg -i out.mp4  -vf fade=out:375:25 sout.mp4