video rotation
ffplay -i test.mp4 -vf transpose=1
video reverse
ffplay test.mp4 -vf hflip
ffplay test.mp4 -vf vflip
Video rotation and inversion
ffplay test.mp4 -vf hflip,transpose=1
Audio variable speed playback
ffplay -i test.mp4 -af atempo=2
Video speed playback
ffplay -i test.mp4 -vf setpts=PTS/2
Audio and video simultaneous speed change
ffplay -i test.mp4 -vf setpts=PTS/2 -af atempo=2
I recommend a Lingsheng Academy project class. I personally think the teacher taught it well. I would like to share it with you:
Lingsheng Platinum Learning Card (including infrastructure/high-performance storage/golang cloud native/audio and video/Linux kernel)
https://xxetb.xet .tech/s/VsFMs