An Input Error means the source file itself can't be processed. The status panel marks the dub with a red Input Error badge, usually early on. This isn't a server issue you can wait out, and there's no retry button — the fix is on your side: correct the source and create a new dub.
What causes it
Input Error covers a small set of source-file problems:
No audio track — the file has video but no sound.
No video track — you uploaded an audio-only file.
No detectable speech — the audio is music, noise, or silence with no clear speech to dub.
The upload didn't complete — the source video couldn't be found; the upload may have failed.
Not enough minutes — there weren't enough minutes to charge the dub.
How to fix it
Check the source. Make sure it's a video file with a clear, audible spoken track.
Re-upload if the upload may have dropped (weak connection, tab closed mid-upload).
Top up minutes if you're short — see Plans & minutes — then try again.
Create a new dub with the corrected source. Editing or waiting on the failed dub won't fix an input problem; there's no retry button.
When to contact support
If the source clearly has audio, video, and speech, your upload completed, and you have enough minutes — but it still fails with an Input Error — ask Dubby in the chat (bottom right) with the dub URL and we'll take a look.