Something is odd with the ffmpeg command path Impossible to open 'D:/Projects/ai/CushyStudio/outputs/D:/Projects/ai/CushyStudio/outputs/ComfyUI_00610_.png'
ffmpeg version 4.2.3 Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3.1 (GCC) 20200523
Impossible to open 'D:/Projects/ai/CushyStudio/outputs/D:/Projects/ai/CushyStudio/outputs/ComfyUI_00610_.png'
However, the args seem ok, so this might be an issue with how ffmpeg works with abs paths on windows: