Hello,
I am using an Motorola ROKR E6 cell phone as a webcam and although it is
listed on 'Supported devices' list as working, I am unable to get it fully
working.
The driver reports five different modes (resolutions) for the device,
which are (output of guvcview):
{ pixelformat = 'YUYV', description = 'YUV 4:2:2 (YUYV)' }
{ discrete: width = 352, height = 288 }
Time interval between frame: 1/20,
{ discrete: width = 176, height = 144 }
Time interval between frame: 1/20,
{ discrete: width = 640, height = 480 }
Time interval between frame: 1/15,
{ discrete: width = 320, height = 240 }
Time interval between frame: 1/20,
{ discrete: width = 160, height = 120 }
Time interval between frame: 1/20,
But in fact only 640x480 works correctly. 320x240 shows only quarter of
the image which three other quarters lightly overlaying on it, and 160x120
works on similar manner. The 352x288 and 176x144 modes show only junk.
This makes the webcam unusable for applications such as Skype which
request one of the smaller modes.
I was able to workaround the issue through hardcoding the 640x480 mode in
the driver (applications used software scaling then) but that's only an
ugly workaround. I would appreciate if you could give me further tips on
diagnosing the issue or simply implement a quirk allowing to drop unusable
video modes (or even leave only the one with largest resolution).
I attach the output of 'lsusb -v'.
--
Best regards,
Michał Górny
http://mgorny.alt.pl/
Bus 005 Device 005: ID 22b8:6006 Motorola PCS MOTOROKR E6
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
idVendor 0x22b8 Motorola PCS
idProduct 0x6006 MOTOROKR E6
bcdDevice 0.01
iManufacturer 3 Motorola Inc.
iProduct 2 Motorola USB Camera
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 315
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 5 Motorola UVC Configuration
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceProtocol 0
iInterface 0
VideoControl Interface Descriptor:
bLength 13
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdUVC 1.00
wTotalLength 66
dwClockFrequency 26.000000MHz
bInCollection 1
baInterfaceNr( 0) 1
VideoControl Interface Descriptor:
bLength 17
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Camera Sensor
bAssocTerminal 0
iTerminal 0
wObjectiveFocalLengthMin 100
wObjectiveFocalLengthMax 800
wOcularFocalLength 100
bControlSize 2
bmControls 0x00000200
Zoom (Absolute)
VideoControl Interface Descriptor:
bLength 8
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 2
wTerminalType 0x0401 Composite Video
bAssocTerminal 0
iTerminal 0
VideoControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 5
iTerminal 0
VideoControl Interface Descriptor:
bLength 8
bDescriptorType 36
bDescriptorSubtype 4 (SELECTOR_UNIT)
bUnitID 4
bNrInPins 2
baSource( 0) 1
baSource( 1) 2
iSelector 0
VideoControl Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 5 (PROCESSING_UNIT)
Warning: Descriptor too short
bUnitID 5
bSourceID 4
wMaxMultiplier 800
bControlSize 2
bmControls 0x00004001
Brightness
Digital Multiplier
iProcessing 0
bmVideoStandards 0x 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 6 VS Class Interface
VideoStreaming Interface Descriptor:
bLength 14
bDescriptorType 36
bDescriptorSubtype 1 (INPUT_HEADER)
bNumFormats 1
wTotalLength 197
bEndPointAddress 129
bmInfo 0
bTerminalLink 3
bStillCaptureMethod 0
bTriggerSupport 0
bTriggerUsage 0
bControlSize 1
bmaControls( 0) 27
VideoStreaming Interface Descriptor:
bLength 27
bDescriptorType 36
bDescriptorSubtype 4 (FORMAT_UNCOMPRESSED)
bFormatIndex 1
bNumFrameDescriptors 5
guidFormat
{59555932-0000-1000-8000-00aa00389b71}
bBitsPerPixel 16
bDefaultFrameIndex 1
bAspectRatioX 4
bAspectRatioY 3
bmInterlaceFlags 0x00
Interlaced stream or variable: No
Fields per frame: 1 fields
Field 1 first: No
Field pattern: Field 1 only
bCopyProtect 0
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 1
bmCapabilities 0x02
Still image unsupported
Fixed frame-rate
wWidth 352
wHeight 288
dwMinBitRate 32440320
dwMaxBitRate 32440320
dwMaxVideoFrameBufferSize 202752
dwDefaultFrameInterval 500000
bFrameIntervalType 1
dwFrameInterval( 0) 500000
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 2
bmCapabilities 0x02
Still image unsupported
Fixed frame-rate
wWidth 176
wHeight 144
dwMinBitRate 8110080
dwMaxBitRate 8110080
dwMaxVideoFrameBufferSize 50688
dwDefaultFrameInterval 500000
bFrameIntervalType 1
dwFrameInterval( 0) 500000
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 3
bmCapabilities 0x02
Still image unsupported
Fixed frame-rate
wWidth 640
wHeight 480
dwMinBitRate 73728000
dwMaxBitRate 73728000
dwMaxVideoFrameBufferSize 614400
dwDefaultFrameInterval 666666
bFrameIntervalType 1
dwFrameInterval( 0) 666666
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 4
bmCapabilities 0x02
Still image unsupported
Fixed frame-rate
wWidth 320
wHeight 240
dwMinBitRate 24576000
dwMaxBitRate 24576000
dwMaxVideoFrameBufferSize 153600
dwDefaultFrameInterval 500000
bFrameIntervalType 1
dwFrameInterval( 0) 500000
VideoStreaming Interface Descriptor:
bLength 30
bDescriptorType 36
bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
bFrameIndex 5
bmCapabilities 0x02
Still image unsupported
Fixed frame-rate
wWidth 160
wHeight 120
dwMinBitRate 6144000
dwMaxBitRate 6144000
dwMaxVideoFrameBufferSize 38400
dwDefaultFrameInterval 500000
bFrameIntervalType 1
dwFrameInterval( 0) 500000
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceProtocol 0
iInterface 7 VS STD Interface
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 5
Transfer Type Isochronous
Synch Type Asynchronous
Usage Type Data
wMaxPacketSize 0x1400 3x 1024 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2 ?
bDeviceProtocol 1 Interface Association
bMaxPacketSize0 64
bNumConfigurations 0
Device Status: 0x0000
(Bus Powered)
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