Get Error_camera_already_in_use When Usb Debugging On My Nexus 5 With Libstreaming

I am trying to use libstreaming library to stream my phone camera output. I built my app based on the Example 3. But I just keep getting this ERROR_CAMERA_ALREADY_IN_USE exception

Solution 1:

I had the same issue, this happens when the first version that you install to the device did not have the permissions for Camera, Audio, etc. These will not be granted automatically by just adding them to your manifest and then redeploying to the phone. The trick is to open the settings, go to the app settings, find your app and then manually enable the permissions for Camera, Audio, etc. From then on, your code should work.