Renaming recording.anydesk to recording.mp4 will never work. You must (transcode/remux) it properly.
| Error | Likely Cause | Solution | |-------|--------------|----------| | Invalid data found when processing input | AnyDesk v9.2+ encryption header | Use FFmpeg 7.3+ with -decryption_key (if key extracted from local AnyDesk config) | | Packet loss in anydesk stream | Corrupted partial recording | Run ffmpeg -i broken.anydesk -c copy -f mp4 fixed.mp4 | | No audio in MP4 | AnyDesk recorded mic only, not system audio | Re-record with OBS or re-sync audio separately | | Slow conversion | Old FFmpeg | Update via winget install ffmpeg (Windows) or brew upgrade ffmpeg (macOS) | Convert Anydesk Video To Mp4 -UPD-
Ensure your recorder is set to save in MP4 format . Start recording, play the AnyDesk session in full screen, and stop the recorder once the session ends. Method 2: Online Conversion Tools Renaming recording