Android Add USB external UVC camera

There are many ways to achieve, according to the steps to see which kind of, online said what pick-up card, in fact, is to turn AV into UVC, now on the market a lot of cameras directly is already UVC, in Windows Plug and Play.

Android is also Linux, this is a good run.

1. First download the Android USB detection program, insert the UVC camera, in the program to see whether the new node in the/dev/video, or/BUS/USB under the new node. If no video node is added, there is no UVC driver. If you have a lot of USB openings, you can connect your computer and enter Ls-l/dev/v* in the ADB shell to see if a new node has been generated.

2. If there are no new nodes, there are 3 options. 1 is to write a video firmware yourself, usually on the tablet has a front and back two cameras, Video0 and Video1 are already occupied, is unable to call the external camera through the two. 2 is to kill a front or rear camera, so that the external USB can be started with Video0 or VIDEO1, which is why the Android without the camera can be successful. 3 is to find the system source code, configure the UVC driver, after compiling and then install.

3 If the new node that is good to do, if there are already 2 cameras on the board, write a program to call the camera ID 3 is good, if there is no 2 cameras, then directly with the system's own camera program before and after switching to see the USB information. If AV is converted by the UVC through the acquisition card, it can also watch DVD (*^__^*) in the camera application.

Some common problems are:

The new firmware cannot be accessed. In fact, Linux is a privilege problem, as long as the permissions are more than 0666 can be. chmod 0666/dev/video3 or chmod 777/dev/video3, video is to see what you add.

Android Add USB external UVC camera