Video subtitles using FFMPEG 

This is a brilliant video, so well explained. Thank you 😊

it write subtitles over video that can't be changed after that suppose if we want to disable it

Can you also add an opaque black box behind subs and change the font color?

how can i generate srt file of a video ? is there any online tool or open source written in java/python?

Use subtitle edit, more fast.

Talk about hard subtitle on mobile ffmpeg.