Mastering FFmpeg Error Logs
When a stream crashes, the FFmpeg command line generates detailed diagnostic logs. Knowing how to read these codes will help you fix connection drops, audio gaps, and color profile issues in minutes.
Common Error Code Registry
1. 'RTMP_Connect1, failed to connect'
The encoder cannot connect to YouTube's server. Check that your internet connection is active and that your firewall allows outbound RTMPS traffic on port 443.
2. 'Non-monotonous DTS in output stream'
This occurs when your concatenated videos have mismatched timestamps. Re-encode all videos to use matching resolutions and frame rates before starting the playlist loop.
3. 'Too many packets buffered for output stream'
The network connection is too slow to send data as fast as the encoder renders it. Reduce your video bitrate by 500 Kbps and retry the stream.
Written by Pinku Nayak
Creator of Pinku's Lab. I build streaming utilities and write technical guides to help creators stream 24/7 on YouTube Live without expensive cloud servers.
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Frequently Asked Questions
How do I fix the 'Connection refused' error in FFmpeg?
Check your stream key validity, network firewall access on port 443/1935, or ensure your local Helper service is running.
What does 'frame= 0 fps=0.0' mean in the helper console?
This indicates that FFmpeg is stuck reading the input file. Verify that the video container is not corrupted and is scale-aligned.