@bryancaudle67623235
Thanks for laying out the details — having a conversion show as “complete” only to find the file missing is genuinely frustrating, and we already have an internal record tracking very similar reports. To help us pinpoint your case quickly and link it to the right thread, could you go through the following checks?
1. Check where your Output Folder is set
Open UniFab → Settings → General, and look at the Output Folder path. If it’s pointing to:
- an external drive’s letter (even one that isn’t the failed drive), or
- a folder shared with another application (e.g., a Streamfab folder, or a temp directory used by other video tools)
…I’d strongly recommend changing it to a dedicated folder on your internal drive (something like C:\Users\<yourname>\Videos\UniFab_Output), then restarting UniFab and trying again. When the output folder is shared with other apps or sits on an external drive whose letter has become unstable, the muxed file can fail to write — but the UI may still show “completed” misleadingly.
2. Confirm where your source videos actually live
You mentioned the failed external drive isn’t being used by UniFab — but please double-check: are the source files you’re dragging into UniFab originally located on that drive (or one of its partitions)? Source-drive stability also affects the conversion result.
3. Check free space on the output drive
Open File Explorer and look at the free space on whichever drive holds your current Output Folder. If it’s nearly full, or if other software (e.g., StreamFab downloads) can fill it up while UniFab is running, that alone is enough to break the output — the MP4 writer fails when there’s no space left, even though earlier stages may already have signaled “done”.
4. Run a minimal test
Drag a 30–60 second short clip from your internal drive (e.g., a folder on C:) into UniFab, set the output folder to a new folder on your internal drive as well, and run it once. This isolates whether the issue is your path/disk configuration or something inside the software itself.
5. Please also share the following so we can follow up properly:
- Which module were you using (Video Converter / Enlarger AI / Upscaler / DVD Ripper, etc.)?
- Your OS version (e.g., Windows 11 24H2)?
- Any third-party antivirus or system-cleaning software installed (Malwarebytes, Norton, McAfee, CCleaner, etc.)? If yes, please check their quarantine areas and the Recycle Bin for any false-positive removals.
Once you’ve gone through steps 1–4 and shared the info in step 5, we’ll be able to tell you the next step precisely.
