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So this thing arrived. First impressions: - SuperSpeed only works in one Type C orientation (no mux) - Audio OK (2ch 48k 16b) - Definitely does 1080p30 uncompressed (YUV 4:2:2) - There may be sharpening - Claims to do 1080p60 but the image becomes softer, so I suspect cheating.pic.twitter.com/nbbe6uN9Vw
It definitely spits out 1080p60 YUV 4:2:2 over USB3, but I think somewhere in between HDMI and that there is a bottleneck and it's getting resampled to something lower. Audio channels are in the right order. No patches needed. Works with USB2, but MJPEG only.
Seems to be the same as this. Signal path seems to be (HDMI) -> ITE HDMI RX -> (tee to ITE HDMI TX) -> (parallel RGB/YUV) -> VS9989 processor -> (parallel RGB/YUV) -> Sunplus USB3 webcam chip -> USB-C (no mux) http://www.vxis.com/html/pdf/VS9989_bf_v1.3.pdf …https://twitter.com/voltagex/status/1271622684263084032 …
I'll defer taking it apart until I decide hacks need to happen. Seems the video processor interface is just I²C, so that should be easy to mess with. Sunplus firmware looks like it might be external, so easy target for hacks there. Quite possibly improvable.
It doesn't expose any UVC controls other than brightess/saturation/contrast/hue, so there is definitely room for improvement there.
WTF... I thought USB-C was intended to be reversible by spec? If it's not, is it still USB-C even though it shares a formfactor?
disassembly time? I wonder what chips it uses.
I think it's the same as this. The USB interface identifies itself as a Sunplus. My guess: (HDMI) -> ITE HDMI RX -> (parallel RGB/YUV) -> (tee to ITE HDMI TX) -> some kind of video processor -> (MIPI-CSI) -> Sunplus MIPI-CSI USB3 camera chip.https://twitter.com/voltagex/status/1271622684263084032 …
I have something similar. Claims to do 4K. 1080p works with the PS4 (HDCP disabled) but cuts at random times, have to restart/reconnect then. Does not capture my Macbook Pro, freezes after few seconds..pic.twitter.com/ZPZCSDmY5P
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