Debugging tool

FFmpeg Error Explainer: Find the Cause and Fix

Paste the final error line and a few lines before it to identify likely causes, practical fixes, and related commands. The analysis runs locally in your browser.

Quick answer

Copy the last 5-20 lines from your FFmpeg terminal output, paste them below, and select Analyze error. Exact messages such as unknown encoder, moov atom not found, invalid input, filtergraph conflicts, and missing files produce the strongest matches.

Error log

Paste FFmpeg output

Ready to analyze

Paste an exact FFmpeg error and select Analyze error. Your log stays in this browser and is not uploaded.

Common FFmpeg errors this tool recognizes

Unknown encoder 'libx264'

moov atom not found

No such file or directory

Invalid data found when processing input

Filtergraph was defined, but codec copy was selected

Could not find codec parameters

Non-monotonous DTS

Unable to find a suitable output format

Local analysis

Your pasted error text is matched in the browser against common FFmpeg error patterns.

Actionable fixes

Each result explains what probably happened and suggests concrete next steps.

Related tools

Open a related command generator when the fix requires changing your FFmpeg command.