Encoding fails on any video

[koopthekoopa]

Describe the bug
Every time I encode a flipnote, it always shows an error after it had prepared the audio.

To Reproduce
Steps to reproduce the behavior:
Encode any video (it always happens when I try to)

Expected behavior
Encode the video without any errors so it will produce a proper PPM file.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Version 10.0.19045

[MrButterfingersss]

I think this happens to me too