bash create-vod-hls.sh beach.mkv
beach/ |- playlist.m3u8 |- 360p.m3u8
Finally, Simple Form support Boostrap 3.
But I found it still dosen't support some components in Bootstrap 3. Or may be in the future. But I can't wait, so I find a solution to support them. It was inspired by https://github.com/plataformatec/simple_form/pull/531#issuecomment-5629150 .
This is a final solution and I used in my project.