Extron DVS 304 DVI experimentation with game consoles
Channel: cinematicslab
Date: 27/04/2019

Longer article: https://slab.dreamwidth.org/1841.html

A collection of video sources (with varying video formats) connected to an Extron DVS 304 DVI (fw. ver. 2.16). The DVS 304 DVI is configured to output 1024x768@60; this is then input into a Datapath VisionRGB E1s for capture. I also have a cheap "EasyCap" CVBS/S-Video capture dongle for comparison. I use a powered splitter (Radio Shack 4-way CVBS/S-Video splitter) to connect the source to both the Extron and the Easycap simultaneously.

Much of this uses the 240p Test Suite: http://junkerhq.net/240p/

- Sega Genesis / 32X (CVBS): Sonic 2 (which alternates between 240p and 480i): 0:00
- Sega Genesis / 32X (CVBS): 240p Test Suite: 3:42
- SNES (S-Video): 240p Test Suite: 5:08
- Wii (YPbPr): 240p Test Suite: 6:26
- Wii (YPbPr): Virtual Console games with both 480i and 480p settings: 9:01

Observations:
- The Extron DVS 304 DVI is absolutely crap at dealing with "240p" signals, regardless of input (CVBS, S-Video, YPbPr). I don't have a test in here using RGBS, but based on the available evidence I don't expect I'd see any difference.
- When set to "480i", Wii VC titles may use "240p". When set to "480p", Wii VC titles are appropriately line-doubled to 480p. However, if you launch Wii VC titles from an emulated NAND (such as with USB Loader GX), you get the "480i" behavior, and no amount of teling USB Loader GX to use a particular mode seems to fix it.