found 2 webCam device 
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device : /dev/video1
 Webcam info : 
	video_formats
		video/x-raw-rgb
width = 1280 height = 720	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 800	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 1024	framerates=[(15, 1), (10, 1), (5, 1)]
width = 960 height = 720	framerates=[(15, 1), (10, 1), (5, 1)]
width = 800 height = 600	framerates=[(15, 1), (10, 1), (5, 1)]
width = 640 height = 360	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 640 height = 400	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 640 height = 480	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 352 height = 288	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 320 height = 240	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 176 height = 144	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 160 height = 120	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
		video/x-raw-yuv
width = 1280 height = 720	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 800	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 1024	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 720	framerates=[(10, 1), (5, 1)]
width = 1280 height = 800	framerates=[(10, 1), (5, 1)]
width = 1280 height = 1024	framerates=[(15, 2), (5, 1)]
width = 960 height = 720	framerates=[(15, 1), (10, 1), (5, 1)]
width = 960 height = 720	framerates=[(10, 1), (5, 1)]
width = 800 height = 600	framerates=[(15, 1), (10, 1), (5, 1)]
width = 640 height = 360	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 640 height = 400	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 640 height = 480	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 352 height = 288	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 320 height = 240	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 176 height = 144	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 160 height = 120	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
		image/jpeg
width = 1280 height = 720	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 800	framerates=[(15, 1), (10, 1), (5, 1)]
width = 1280 height = 1024	framerates=[(15, 1), (10, 1), (5, 1)]
width = 960 height = 720	framerates=[(15, 1), (10, 1), (5, 1)]
width = 800 height = 600	framerates=[(15, 1), (10, 1), (5, 1)]
width = 640 height = 360	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 640 height = 400	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 640 height = 480	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 352 height = 288	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 320 height = 240	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 176 height = 144	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
width = 160 height = 120	framerates=[(30, 1), (25, 1), (20, 1), (15, 1), (10, 1), (5, 1)]
name : UVC Camera (046d:0807)
v4l_driver : v4l2src
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device : /dev/video0
 Webcam info : 
	video_formats
		video/x-raw-rgb
width = 640 height = 480	framerates=[(30, 1)]
width = 352 height = 288	framerates=[(30, 1)]
width = 320 height = 240	framerates=[(30, 1)]
		video/x-raw-yuv
width = 640 height = 480	framerates=[(30, 1)]
width = 352 height = 288	framerates=[(30, 1)]
width = 320 height = 240	framerates=[(30, 1)]
name : Built-in iSight
v4l_driver : v4l2src
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Best webcam resolution found 
{'framerate_selected': (10, 1), 'name': dbus.String(u'UVC Camera (046d:0807)'), 'height': 720, 'width': 1280, 'framerate_list': [(15, 1), (10, 1), (5, 1)], 'device': dbus.String(u'/dev/video1'), 'source_input': 'v4l2src'}

 

Best webcam resolution found 
{'framerate_selected': (30, 1), 'name': dbus.String(u'Built-in iSight'), 'height': 480, 'width': 640, 'framerate_list': [(30, 1)], 'device': dbus.String(u'/dev/video0'), 'source_input': 'v4l2src'}