Troubleshooting v4l2loopback Issues on Jetson with Ubuntu 20.04 in ARM Environment

craig · January 17, 2024, 3:26pm

If you’re using opencv as your goal, can you use gstthetauvc instead of the loopback?

See the last post.

Do you have multiple versions of libuvc installed on your system? The Linux driver for the THETA installs a patched version of libuvc. Verify that your OS didn’t already come with a libuvc version already installed. It may conflict with the patched version of libuvc.

In the sourcecode, did you change this line to /dev/video0?

github.com

ricohapi/libuvc-theta-sample/blob/f8c3caa32bf996b29c741827bd552be605e3e2e2/gst/gst_viewer.c#L190


      
          
          	cmd_name = rindex(argv[0], '/');
          	if (cmd_name == NULL)
          		cmd_name = argv[0];
          	else
          		cmd_name++;
          
          	if (strcmp(cmd_name, "gst_loopback") == 0)
          		pipe_proc = "decodebin ! autovideoconvert ! "
          			"video/x-raw,format=I420 ! identity drop-allocation=true !"
          			"v4l2sink device=/dev/video1 sync=false";
          	else
          		pipe_proc = " decodebin ! autovideosink sync=false";
          
          	if (!gst_src_init(&argc, &argv, pipe_proc))
          		return -1;
          
          	res = uvc_init(&ctx, NULL);
          	if (res != UVC_SUCCESS) {
          		uvc_perror(res, "uvc_init");
          		return res;