Low image contrast, looking like limited RGB stream displayed as full RGB content

[supercurio]

Hi! Thanks for this cool project.

My setup:

• RTX 2070 PC running Nvidia Gamestream
• Wii U port 1.6
• Calibrated TV

When streaming my PC, blacks are elevated and whites slightly dimmer. I didn't capture the output to check the RGB values yet but eyeballing it, it looks just like a limited RGB (16-235) stream displayed as full RGB (0-255).

I'm reading in discussions about other moonlight clients that the client can select to be provided a limited or full range stream by the host, hopefully it's the case in the library here as well.
Otherwise, either the video decoder or the display shader would be able to complete the conversion - whichever option would provide the least banding.

I'm not familiar with this platform very much to contribute with code, but I can complete further measurement and testing onwards.

[GaryOderNichts]

Hmm interesting.
moonlight-common-c states that "the encoder will default to Rec 601" and "Limited" color range "If not set". The display shader also expects Rec 601, so this should be fine.

Further testing and measurements would be appreciated.

[encauporce]

At first I thought there was something wrong with gamma.