Convertag

Videos to MP4 for Mac — TV app, Plex, Jellyfin & more

Convertag recognises films and TV shows, keeps picture and sound without any loss in quality and puts everything where you watch it. MP4 files just get new info.

Coming soon to the Mac App Store For Macs with Apple silicon, macOS 14 or later

The Convertag queue: an episode is being converted, a film is waiting for its match to be confirmed, and for another episode the app lists what happens to picture, sound and subtitles.

No loss in quality

A compatible picture is simply repackaged — usually in seconds. Only what Apple devices can’t play gets converted.

Subtitles that play everywhere

Image subtitles from Blu-ray and DVD become text. Matching .srt files next to the video come along automatically.

Runs on its own

Watch folders — new videos end up in your library, ready to play, even with the window closed.

See what happens before it starts

For every video, Convertag shows track by track what stays, what gets adapted and what’s dropped — with size and time. With “My languages”, only the audio and subtitle tracks you need are kept.

Picture: Stays untouched if Apple devices can play it — including 4K with HDR10 or Dolby Vision. Otherwise your Mac converts it with its own video engine. H.264 and HEVC (8/10-bit) are copied, Dolby Vision 5 and 8 as dvh1. AV1, VP9, MPEG-2, VC-1 and others → HEVC or H.264 via VideoToolbox, HDR colour info is kept.
Sound: Stays if it already fits. Cinema sound that Apple TV doesn’t know becomes Dolby Digital Plus — stereo becomes AAC. AAC, AC-3, E-AC-3 and ALAC are copied. DTS, TrueHD, FLAC, Opus and others → E-AC-3 5.1 (640 kbit/s) or AAC stereo.
Subtitles: Text subtitles come along, image subtitles are read with text recognition on your Mac. “Forced” and “SDH” flags are kept. SRT, ASS/SSA, WebVTT → mov_text. PGS, VobSub and DVB → text recognition with Apple Vision. External .srt, .ass, .ssa, .vtt with the same name.

The “Tracks & Info” view: 4K picture with Dolby Vision stays untouched, DTS-HD audio becomes Dolby Digital Plus 5.1, two image subtitles are turned into text. Interface shown in German.

Saved where you watch

Choose where finished videos go — for everything at once or for each watched folder.

Next to the original In the same folder as the video.
Fixed folder All videos in one folder of your choice.
Jellyfin / Plex Library with folders, NFO files and artwork.
Infuse Library with folders and artwork.
TV app Straight into the TV app, ready for Apple TV.

If the video already exists, it gets a new name, replaces the old one or is skipped — your choice.

The “Save” settings: five destinations to choose from — next to the original, fixed folder, Jellyfin / Plex, Infuse and TV app. Interface shown in German.

Title, description and artwork

Convertag reads title, year, season and episode from the file name and looks up the matching info. If a match isn’t quite certain, the app asks instead of guessing.

Title, description, genre, director, release year and artwork then sit inside the MP4 — the way the TV app, Infuse and Plex show them. In English or German.

The info comes from OMDb and Wikidata. If you have your own TMDb key, you can add it.

Watched folders

Add a folder and Convertag takes care of every new video in it — as soon as the file has finished copying. Each folder has its own settings: destination, languages, what happens to the original.

If you like, Convertag starts at login and works quietly from the menu bar. Originals go to the Trash at most, never straight away for good.

Your videos stay on your Mac

Converting and text recognition happen entirely on your Mac. To look up info, only the title and year from the file name leave it — never the file, never the file name itself. No account, no ads, no usage statistics.

All the details are in the privacy policy

MKV, AVI, WebM, VOB … in. MP4 out.

For the TV app, Apple TV, QuickTime, Infuse, Plex and Jellyfin.

Coming soon to the Mac App Store For Macs with Apple silicon, macOS 14 or later