Getting Started

Getting started — your first sync (v1.3.0)

This guide is for people who have never used a sync tool. You need a Windows 10/11 64-bit computer, two versions of a video, and some free disk space.

Goal: take the audio from one video and make it fit the picture of another.

1. Download and open AutoSync

1. Open the AutoSync v1.3.0 release page.
2. Under Assets, download AutoSync-v1.3.0-Windows-Portable.zip (not the "Source code" ZIP).
3. Right-click the ZIP and choose Extract All…, into a folder you can write to, such as Documents\AutoSync.
4. Open the extracted AutoSync-v1.3.0-Windows-Portable folder and double-click AutoSync.exe.

Python and FFmpeg are already included. If the app opens but says the engine is not ready, open Settings → Engine & AI models → Check / set up engine.

2. The main window at a glance

• Top bar: Audio, Subtitles and Jobs tabs, Settings on the right.
• Audio tab, left: the Source list (audio to transfer) and the Target list (video to match).
• Audio tab, right: the job settings: Output, Matching, Censored or edited dub, Save to, Audio tracks.
• Bottom bar: tells you the next thing to do (with a Show me button), and holds Preview & Edit and Start selected jobs.

3. Add your videos

1. In the Audio tab, keep Include audio jobs ticked.
2. Under Source, click Add files and pick the video whose audio you want.
3. Under Target, click Add files and pick the video whose picture you want to keep.

You can also drag files into the lists. For several episodes use Add folder on both sides: row 1 pairs with row 1, and so on. Match episode numbers lines rows up by the numbers in the filenames; check every pair, and use Reorder rows if needed. The selected pair is highlighted in both lists.

4. Choose the audio tracks

Each file row has its own track menu (for example Track 2 · jpn). Pick:

• Source: the track you want in the result.
• Target: the target's soundtrack (used for comparison, and for any scenes only the target has).

Do not assume track 1 is the language you want. For more detail open Audio tracks → Tracks for the selected pair.

5. Choose the output and method

• Output: pick Full target audio for your first try. (The other two cards are explained on the wiki home page.)
• Matching → Method: leave Standard (default).
• Censored or edited dub: leave Off unless your source is a dub that cut scenes (see this page).

6. Where the result goes

Save to → Folder (optional): leave it blank and AutoSync creates AutoSync Outputs beside the target video. Or click Browse, or Use target folder. Originals are never overwritten.

Large temporary files go to AutoSync Temp beside the target video while a job runs and are removed afterwards. To use another drive, set Settings → Folders → Temporary work folder (optional).

7. Start

1. When the bottom bar says Ready to sync the selected jobs., click Start selected jobs. If it says something is missing, click Show me.
2. The bottom bar shows progress. Don't close AutoSync until it finishes.
3. Open the Jobs tab. Each job shows Finished, Needs review or Failed; the tab badge counts results that need review. Use Open output to find the files.

Full target audio exports a FLAC audio file, not a finished video. Mux it with the target video (at 0 ms delay) in your editor or muxing tool. Main episode only and some other options also export an edited video; use the FLAC from the same job with it.

8. Check the result

Automatic sync is very accurate on most material but not guaranteed. Listen near the start, the middle, the end and across any flagged point. If a job says Needs review, check it in Preview & Edit before using it: select the pair and click Preview & Edit in the bottom bar.

Optional: before syncing, the small play icon on a file row lets you mark a range to use from that video (for example to drop a recap). Originals are not changed.

Next steps

• Preview & Edit: review and fix by hand.
• How syncing works: what is measured and what can go wrong.
• Troubleshooting.

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