Subler is a macOS app created to mux and tag mp4 files. The main features includes:
* Creation of tx3g subtitles tracks, compatible with all Apple's devices (iPod, AppleTV, iPhone, QuickTime).
* Mux video, audio, chapters, subtitles and closed captions tracks from mov, mp4 and mkv.
* Raw formats: H.264 Elementary streams (.h264, .264), AAC (.aac), AC3 (.ac3), Scenarist (.scc), VobSub (.idx).
* metadata editing and TMDb, TVDB and iTunes Store support.