Subler is an macOS application created to mux and tag mp4 files.
The main features includes:
- Creation of TX3G and WebVTT subtitles tracks, compatible with all Apple's devices (iPhone, iPad, AppleTV, iPod, QuickTime).
- Muxing of video, audio, chapters, subtitles, and closed captions tracks from mov, mp4, and mkv files to mp4.
- Raw formats: H.264 Elementary streams (.h264, .264), AAC (.aac), AC3 (.ac3), Scenarist (.scc), VobSub (.idx).
- Full iTunes style Metadata editing.
- Metadata lookup for Movies and TV Shows on TheMovieDB, TVDB, and iTunes Store.