video macOS: use device id

Change-Id: I341fcfda799bc9bda2f3683a4cf3e59d24bda269
diff --git a/src/media/video/osxvideo/video_device_impl.mm b/src/media/video/osxvideo/video_device_impl.mm
index 45a3cbf..e16cee1 100644
--- a/src/media/video/osxvideo/video_device_impl.mm
+++ b/src/media/video/osxvideo/video_device_impl.mm
@@ -112,7 +112,7 @@
 {
     DeviceParams params;
     params.name = [[avDevice_ localizedName] UTF8String];
-    params.input = [[avDevice_ localizedName] UTF8String];
+    params.input = id;
     params.framerate = rate_;
     params.format = "avfoundation";
     params.pixel_format = "nv12";