With other renderers (e.g. EVR) this line is not there. Only appears when using MPC Script Source with MPC Video Renderer in MPC-HC & MPC-BE.  Source file: https://files.fm/u/upa2ygcb2s Script: ``` a=LWLibavAudioSource("test.mp4") AudioDub(LWLibavVideoSource("test.mp4",fpsnum=50), a) ```