Do this program generate subtitles as video or are they store as text?

[gustawdaniel]

Text format would be better to further process.

[zaltinsoy]

This program, by default, adds subtitles directly to the video. To get an .srt file, you can use the --output_srt option. For additional output formats, this PR adds the option to save as .txt, and this one introduces .vtt support. I have also created this fork to implement all these features.