Warning: Specific Player Codecs Strip ComfyUI Metadata

Damaneger · reddit · 2026-08-26

A user reported that setting mpvnet as the default media player caused all generated ComfyUI video metadata (including workflows) to disappear. The culprit is identified as the FFmpeg version (libvpx-vp9) bundled with the player, which aggressively strips non-video data. This issue persisted even after switching players, suggesting a system-wide codec change.

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