[Feature Request] Hardcode subtitle support (burn into enhanced video)

[Ultima14]

I'm not sure if there's a way already to do this but this would be really useful for .ass styles karaokes that can't play correctly in android tv devices

[ySergi]

Ask Gemini/ChatGPT/whatever about how to burn in subtitles with FFmpeg, then paste that line of FFmpeg into RVE's FFmpeg command line.