Problem

Chroma dots are visible on decode-orc preview when working with Y/C data produced via vhs-decode. In ld-analyse, the chroma dots do not appear.

Proposed solution

I believe the Y/C sources from vhs-decode needs to use the mono decoder on the Y TBC, the selected chroma decoder on the C TBC, and then sum the two together to create the final output.

Additional context

Preview output from ld-analyse:

Preview output from decode-orc when viewing the FFmpeg Video Sink: