Converts ordinary video files into .bnd bundles that the
Video Player app by LTVA can play on
a Flipper Zero, using FFmpeg for all the heavy lifting.
This is a modified version of JacobTDC's converter.py. All of the original conversion logic — dithering, scaling, frame-rate conversion, the bundle format, the sample-drop desync fix — is JacobTDC's work. The additions here are