FFmpeg & Subtitles

Download FFmpeg for Windows

Steps

Download FFmpeg
Extract it and save it to C drive (choose any location - it’s optionl)
Set environment variable - copy the location of bin folder which is inside the extracted file and set the location on system path variable.
Done!

Remove Hard Subtitles

Let’s say you have a english video file name demo.mkv and it has horrible subtitile problem like chines or a language that you can’t understand, than you can simply remove subtitle usign ffmpeg framework. We are talking about built-in subtitiles not .srt file. To do so, follow the following steps:

Install FFmepg on your pc and set path variable if needed.
Go to your file location and open command prompt or terminal there.
After that run the following command - ffmpeg -i video.mkv -vcodec copy -acodec copy -sn video-no-subs.mkv

Integrate Hard Subtitle

Now if any case you want to integrate a srt file on a video player. Then follow below step -

Download desire subtitle (language) from online
let’s assume demo.mkv and downloaded file named sub.srt
put both file in one location and open terminal from that location and run following command
First convert the subtitles to .ass format: ffmpeg -i sub.srt subs.ass
To mux subtitles into a video file run - ffmpeg -i demo.mkv -i sub.ass -codec copy -map 0 -map 1 output.mkv

Extract Subtitile for Video file

Now in these case, a video file with an embeded subtitile and you want to make it srt file or other work a soft subtitile file. We cas do it by following command

ffmpeg -i demo.mkv -map 0:s:0 sub.srt

That’s it.