Investigations - Video Editing

Overview

To Investigate

• ffmpeg encode with “smi” subtitle file.

Tips

Compression

ffmpeg -i input.mp4 -vcodec libx265 -crf 28 output.mp4

• https://superuser.com/questions/922911/clipped-video-using-ffmpeg-is-shorter-than-expected

• -stdin and -nostdin

Motion Detection

https://www.dvr-scan.com/

• https://askubuntu.com/questions/422341/how-can-i-detect-motion-in-a-long-mostly-dull-video

cropping

ffmpeg -i input.webm -vf "crop=width:height:x:y" -c:v libx264 -c:a aac output.mp4

framerate

ffmpeg -i input.webm -vf "crop=width:height:x:y,fps=24" -c:v libx264 -preset slow -crf 22 -c:a aac -b:a 128k output.mp4

Apps

• https://media.tebiki.jp/002

• https://jp.videoproc.com/edit-convert/windows-11-compress-video-files.htm

• https://techwiser.com/best-video-compressor-for-linux/

• https://unix.stackexchange.com/questions/28803/how-can-i-reduce-a-videos-size-with-ffmpeg