New tool – EternalDub (free dub sync tool for Windows)

[Moguel0818]

Hey everyone!

After a long time planning and testing, I developed a tool to preserve classic dubs: EternalDub.

Many old dubbed films only survived on bad sources (TV recordings, VHS, old DVDs), and because of that, a lot of them even look older than they really are. The program takes that dub and puts it on any higher-quality source you have, making a remux, without re-encoding the video or the original audio. In other words, you don't lose any quality.

My reason for making this, besides wanting to help with media preservation, is my little brother. He has dyslexia, which makes it hard for him to follow subtitled films, so dubs are a priority.

To be honest: I (still) don't know how to code. I did the programming with help from Claude (an AI). But yes, I developed everything with a lot of attention and care, because I wanted to make something really good.

Features:
- Automatically syncs dubs with the film's audio.
- Fixes sources with cuts or desync, section by section.
- Shows the waveforms so you can check and manually adjust the selected dub.
- Doesn't re-encode the video or the original audio when saving.
- Builds the final MKV already organized (dub, original audio, subtitles), according to the user's preference.
- And more.

You can find it on GitHub: https://github.com/Moguel0818/EternalDub

I've "remuxed" three films with it so far. For example, I managed to put the Brazilian dub of "Mad Monster Party" (1967) on the foreign BD remux, and it lined up perfectly with the high-quality video.

I believe this can help a lot of people who preserve media. I say that because I'm one of them. It's free and open source. Anyone who wants to test it, give feedback or report bugs, I'd be really grateful!

[Feallan]

Thanks for sharing it and sorry you got caught by the auto bans before. I edited your post to include the full link for easier access

[DoomBot]

Thanks Moguel0818, this "sounds" awesome!

[BusterD]

Thanks, this could be useful for syncing Laserdisc or VHS audio to BDs/UHDs. Would it be possible to add a setting that tells it the languages are the same, so it can also use dialogue as well as music + effects to try and sync the audio? Could it handle tracks that have the same dialogue, but some changed music?

Some other things that would be nice to have:
- Export just the audio as wav or flac (or whatever the input format was)
- Open .mpls playlists (to handle Blu-rays that have the director's cut or other cut on the same disc)