--- id: export-and-audio-tracks title: Export and audio tracks summary: What Create Final Video produces, where the file is saved, output formats and audio codecs on Windows and Mac, adding the dub as a second audio track or replacing the original, keeping background music with source separation, and what the export checks before it starts. platforms: [windows, macos] app_version: "1.39.0" review_basis: source-review reviewed: "2026-10-05" error_codes: [] labels: [Create Final Video, Audio Track Handling, Add New Track, Replace Existing, Source Separation, Overlay background audio, Background Mix Level] aliases: [export, render, save video, output, mp4, mkv, mov, webm, aac, opus, audio track, multiple languages, youtube, background music, keep music, separation, re-encode, quality, resolution, where is my video, audio only, mp3, wav, save finished video, keep original sound, silent after ten lines, stop export] canonical: https://aivideotranslator.app/docs/export-and-audio-tracks.html order: 9 --- # Export and audio tracks This help describes AI Video Translator 1.39.0. If you are helping someone and do not know which version they use, ask them to open Settings → About App and read App Version (for example `1.39.0+3`; use the part before `+`). Help for another version: https://aivideotranslator.app/docs//llms-full.txt (replace ; the list of published versions is in https://aivideotranslator.app/llms.txt) You can save a new video with your translated voice using “Create Final Video”. The app leaves your original video unchanged. ## Save the finished video When rendering finishes, you choose where to save the file. The app suggests your original filename with _translated added. 1. Choose a destination folder. 2. Keep or change the filename. 3. Choose “Save Translated Video”. After you save, you'll see “Your final video was created and saved to the location you chose.” and the app marks your project completed. If you cancel the save window, it doesn't save anything at that destination. You'll also have a copy in your project's folder. You can find that folder under “Path to Projects” in “Settings”. ## Keep picture quality Your resolution, frame rate and picture quality stay the same because the app copies the picture without re-encoding it. Only the audio changes, so there are no picture-quality settings to choose. On Windows, your MP4, M4V, MOV, MKV or WebM video keeps its container format. Other containers export as MP4, and on Mac you'll always get MP4. You can select MP4, AVI, MKV, MOV, WMV, FLV and WebM files. If the app can't copy the picture into the output format, export fails; you'll need to convert the source to a common MP4 first. ## Keep or replace original sound You choose what happens to your original audio under “Audio Track Handling” on the project's “General” tab. New projects start with “Replace Existing”. - “Add New Track” keeps the first original audio track unchanged and adds the dub as a second, default track. - “Replace Existing” removes original audio and keeps only the translated track. If your player supports several audio tracks, viewers can switch between them. The language labels help compatible players and platforms show which track is which. If you turn on separation and background overlay, the app mixes background sound into the dubbed track only. Your original track keeps its full original mix. You get one translated track per project. If you want several languages in one video, export a project for each language and combine the tracks in a video editor. ## Keep background music You can use source separation to split speech from music, effects and ambience before you transcribe. Background overlay then mixes that background sound under your new voice. 1. Before transcribing, open the project's “Transcription” tab. 2. Turn on “Source Separation”. 3. Choose a “Separation Model”. 4. Keep “Overlay background audio” on. 5. Set “Background Mix Level” from 0% to 100%. 6. Transcribe the video. Your new projects start with separation and background overlay on, at full background level. Separation can also help the app hear words more clearly when music covers speech. If the separated background is missing, you can still export, but the app warns you that the dubbed track has no music or ambience. You can recreate that background by transcribing again with separation on. Your preview volume sliders only change what you hear in the app. “Background Mix Level” changes the export; you can't separately set voice loudness or make music dip during speech in the exported video. ## Understand silent parts Your exported video always keeps its full length. In places without segments, you'll hear only the separated background if overlay is on, or silence if it's off. With “Add New Track”, you also keep the original track. If you delete a segment, that part of the video won't have a dub. When you export for free, the app dubs the first 10 segments in order of start time. If you've turned background overlay off and replaced the original audio, later segments are silent; [Subscription and free tier](https://aivideotranslator.app/docs/1.39.0/subscription-and-free-tier.md) explains the allowance. ## Fix missing translations or voices Before you export, each included segment needs translated text and a generated voice. You'll also need to choose voice settings for every speaker. 1. If export reports missing translations, complete the lines under “No Translation”. 2. If export reports missing audio, generate voices for the lines under “No Voicing”. 3. If a speaker has no voice, open project settings. 4. Choose a voice for that speaker. The app tells you how many lines need work and switches to the filter that shows them. If you're using the free tier, lines after the first 10 don't need translations or voices for export. If a voice line is too long, the app speeds it up at export. [Voices and speakers](https://aivideotranslator.app/docs/1.39.0/voices-and-speakers.md) explains how far it can go and how you can give a line more time. ## Cancel an export During rendering, choose “Cancel” in the progress window. You can cancel while the app is preparing or staging the result. It waits for processing to stop, removes the temporary output and keeps your previous project video. Once the app starts putting the completed file in place, you can't cancel rendering. You can still dismiss the save window afterwards without choosing a destination. ## Export audio or subtitles You can export your project as video only. There's no option to export just its audio or subtitles. You can save individual test clips from “TTS Test” and “Separation” under “AI Providers”. Those clips aren't an export of your project's soundtrack. ## Fix export errors You'll need room for a temporary full copy of the video as well as the final file. Saving can also fail if another program locks the file or your destination is read-only; [Troubleshooting](https://aivideotranslator.app/docs/1.39.0/troubleshooting.md) covers these errors. 1. If disk space is short, free space on the affected drive, including the system's temporary-file drive. 2. If another program is using the file, close that program or choose a different filename. 3. If the destination is read-only, choose a writable folder. 4. If an internal export error appears, open “Technical details”. 5. Use “Send Feedback” to share the cause with support. ## Export with an assistant You can explicitly ask a connected assistant to export your current voices. It won't translate or make voices for missing lines, and it tells you the saved path, file type, size and warnings. You can't undo an export. Assistants must never automatically repeat paid processing after an error; [Local MCP assistant](https://aivideotranslator.app/docs/1.39.0/automation-mcp.md) explains how to recover without starting the work again. ## Technical details You'll find the project copy as `final_video.mp4`, even if its exported container differs. Windows encodes AAC at 192 kbps, 48 kHz stereo, or Opus at 128 kbps for WebM; Mac uses macOS AAC at 192 kbps. The app tags dub tracks with the target language and names them with that language's name plus Dub. A supported input container can still contain a codec the app can't decode or remux. MCP `export_project` returns a file-backed result, and `exportBlocked` names the blocking row IDs. After a successful job, the reply advises verification with `list_segments`; you can only undo free edits with `project_history`. With `get_frame`, the host receives source images; exported video replies don't contain video bytes. Before exporting, you need an existing grant for the destination folder.