Is this always a server bug?
Not always. It is often caused by token expiry or unstable upstream media paths.
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Troubleshooting
Download Failed During Finalize: How To Fix
Finalize failures occur when extraction completes partially but output file validation fails before delivery.
Symptoms
- Message says video could not be finalized.
- Progress reaches near completion then fails.
- Job finishes without output file.
Why this happens
- Source token expired during final stage.
- Source switched media path during processing.
- Transient write or merge failure in runtime pipeline.
Fix steps
- Regenerate immediately to get a fresh media URL token.
- Retry with the original source page URL instead of a cached redirect URL.
- Try the download again after a short delay if the source is unstable.
Primary guide
For full usage flow, read Source URL Quality Guide.
Provider page: instagram.com
FAQ
Can retrying help?
Yes. A fresh resolve often fixes finalize failures caused by expiring tokens.