IT notes

libx265

To reduce/compress a video size you could use: ffmpeg -i input.mov -vcodec libx265 -crf 28 output.mp4 Be aware that libx265 is not supported in many players so you can always fallback to H.264: ffmpeg -i input.mov output.mp4 https://unix.stackexchange.com/questions/28803/how-can-i-reduce-a-videos-size-with-ffmpeg

add subtitles

Add subtitles to a mkv file: ffmpeg -i input.mkv -f srt -i input.srt -map 0:0 -map 0:1 -map 1:0 -c:v copy -c:a copy -c:s srt output.mkv