RinCast 1.0.2

Fixed

• PC VR on a Quest 2: the PC sent the game, but the headset never showed it and gave up after
  100 seconds. While VR started, the desktop stream kept running, and its decoder stayed open
  even in VR. A Quest 2 doesn't have the video decoding hardware for both at once. Starting VR
  now stops the desktop stream and frees its decoders first; leaving VR starts the desktop again.
  This also gives the game the desktop's share of the bandwidth while it starts. Not yet tested
  on a Quest 2.
• When the PC sends the game but the headset can't show it, the headset now says so after
  15 seconds and suggests H.264 or a lower VR quality. Before, it waited 100 seconds and blamed
  SteamVR.
• The headset's log says why a picture is missing: whether the video decoder started, why it
  couldn't, when it decoded its first frame, and why it dropped frames.