Cause the frozen video when use multiple MediaSession in a process

[sinhngoc2008]

I added a USBCamera UserInterface and MediaFilePlayer UserInterface to a sample and test with multiple object.
When I add multiple players into a form (10 players), and start the usb camera , the camera display well. Then I start each player with an mp4 media file. It may cause to frozen of video from usb camera.

Please take a look at the sample
Sample.zip

How can we use multiple mediasession object in a process?