Using SubStation Alpha (ASS) subtitles will allow you to format the subtitles however you like. Nothing is re-encoded, so the whole process will be quick and the quality and formats will be preserved.
To mux subtitles into a video file using stream copy mode: ffmpeg -i input.mkv -i subtitles.ass -codec copy -map 0 -map 1 output.mkv Of course sometimes hardsubs are needed if the device or player is unable to utilize softsubs.
Either with mplayer, or asa (aegisub and, in the future, vlc), or vsfilter. This requires re-encoding and the subtitles become part of the video itself. They gives total different subs font size (one 2 times smaller than other). The subtitles video filter can be used to hardsub, or burn-in, the subtitles. The default font size of all normal text.
There are two methods to use subtitles: hardsubs and softsubs. subs SSAFile.load(subtitles.srt) for line in subs: print(line.text) subs.insert(0. Note: To change the product logo for your own print manual or.