Video Notes
Tools:
FFmpeg
Slice clip, where 27 and 2 are the start index and duration in seconds:
ffmpeg -ss 27 -i in.mp4 -c copy -t 2 out.mp4
Cut audio:
ffmpeg -i in.mp4 -c copy -an out.mp4
10x slowdown:
ffmpeg -i in.MP4 -filter:v "setpts=10*PTS" out.mp4
Adjust video framerate and audio tempo:
ffmpeg -i video.mp4 -filter_complex '[0:v]setpts=4*PTS[v];[0:a]atempo=0.5[a]' -map '[v]' -map '[a]' video-slow.mp4
GoPro
Py API
Linux Tools