Reduce the delay to 10 milliseconds

[yanmingsohu]

Where did the delay come from?
Is there a delay in the video frame sent by the device?
Or is there a delay when the pc video is decoded.
Is there a way to further reduce the delay?
The current delay is almost unacceptable for FPS games.

[rom1v]

The global delay is due to:

• encoding on the device
• transmission from the device to the computer
• decoding on the device
• rendering

Reducing the definition/bitrate reduces the latency.

The latency is also very dependent on the device encoder (in general, newer and high-end devices are better).

Also see #646.