Burn (harcode) srt into mp4

ffmpeg-hardsubs.txt

Step 1. Download ffmpeg
(ffmpeg static builds: https://johnvansickle.com/ffmpeg/ )


Step 2. Make sure the SRT is valid:
Valid format:
1
00:00:00,000 --> 00:00:03,540
hi bla bla bla

Invalid:
1
00:00:00 --> 00:00:03
hi bla bla bla


Step 3. execute
ffmpeg -i video.mp4 -vf "subtitles=subfilename.srt" output.mp4

Bonus:
To download CC from youtube.
youtube-dl --all-subs http://www.youtube.com/watch?v=etc
It will download a vtt file. To convert it to srt
ffmpeg -i filename.vtt subtitle.srt