MQDH Cinematic Casting Issue
Not a developer but instead a content creator.
The Meta Quest Developer Hub's casting function has proven incredibly useful for the recording of gameplay footage across many games, with the cinematic 16:9 aspect ratio being the best option for this.
Recently, (as of 26/09) I've noticed that for some applications, for example, Resident Evil 4 VR; the cinematic aspect ratio is no longer working correctly. It appears to only be recording one of the eyes instead of both, meaning the view on the casting is off-centre and leaves a black bar on the side of the screen.
In the attached image, I had the casting set to cast from the right eye; and I was aiming down the sights with my right eye, yet as we can see, the casting is only showing the left side, as if only casting from that side.
I have tried restarting everything; uninstalling and re-installing MQDH and even rolled back to previous versions to find any possible fix but have been unable to resolve the problem.
Given that the cinematic casting works for other applications and is only broken on some, I'm going to assume there's a specific issue somewhere that my basic troubleshooting won't be able to solve.
However, I'm asking to see if anyone else has had this issue (I know a friend of mine and one person on Reddit have experienced it) perhaps have found a solution to it, as I've tried everything I could think of.
It still seems as though both of your situations are casting from the headset to a PC to use MQDH to stream.
Casting meaning from the headset to the PC and streaming meaning to Twitch I assume using OBS or something similar.
I'm not sure that MQDH is meant to be casted in Cinematic, but you can submit a Support Ticket to report this as a bug.