Merge pull request #8271 from ziggy90127:avfoundation-bugfix1

modules/videoio/src/cap_avfoundation.mm

@@ -317,7 +317,8 @@ int CvCaptureCAM::startCaptureDevice(int cameraNum) {
     capture = [[CaptureDelegate alloc] init];
 
     AVCaptureDevice *device;
-    NSArray* devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
+    NSArray* devices = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo]
+            arrayByAddingObjectsFromArray:[AVCaptureDevice devicesWithMediaType:AVMediaTypeMuxed]];
     if ([devices count] == 0) {
         std::cout << "AV Foundation didn't find any attached Video Input Devices!" << std::endl;
         [localpool drain];

modules/videoio/src/cap_avfoundation_mac.mm

@@ -305,7 +305,8 @@ int CvCaptureCAM::startCaptureDevice(int cameraNum) {
     NSAutoreleasePool *localpool = [[NSAutoreleasePool alloc] init];
 
     // get capture device
-    NSArray *devices = [AVCaptureDevice devicesWithMediaType: AVMediaTypeVideo];
+    NSArray *devices = [[AVCaptureDevice devicesWithMediaType: AVMediaTypeVideo]
+            arrayByAddingObjectsFromArray:[AVCaptureDevice devicesWithMediaType:AVMediaTypeMuxed]];
 
     if ( devices.count == 0 ) {
         fprintf(stderr, "OpenCV: AVFoundation didn't find any attached Video Input Devices!\n");