USB cam detected but no picture

peque · Post by **peque** » Mon Mar 08, 2010 10:41 am

hey Forum.

I have a Zoneminder setup - tryin to merge it along with my MythTVsetup.
I have 2 IP gadget NC1000 cam up and running fine without any problem.

But I have also a USB cam from logitech:

Code: Select all

Bus 003 Device 002: ID 046d:0840 Logitech, Inc. QuickCam Express
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               1.00
  bDeviceClass          255 Vendor Specific Class
  bDeviceSubClass       255 Vendor Specific Subclass
  bDeviceProtocol       255 Vendor Specific Protocol
  bMaxPacketSize0         8
  idVendor           0x046d Logitech, Inc.
  idProduct          0x0840 QuickCam Express
  bcdDevice            1.00
  iManufacturer           0 
  iProduct                1 Camera
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           55
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0000  1x 0 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0001  1x 1 bytes
        bInterval              16
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
      bInterfaceProtocol    255 Vendor Specific Protocol
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x03ff  1x 1023 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0001  1x 1 bytes
        bInterval              16
Device Status:     0x0001
  Self Powered

But I can managed to get a picture of whitenoise or something like that - but not a image in generel to se what's happening with on the CAM.

Its just green image or white noise - so I think it something about the setup and settings for the CAM. Probing after the CAM cannot find it - But I've testet it in my laptop and runs fine there!

Code: Select all

Device Path	/dev/video0
Capture Method	Video For Linux version 2
Enheds Kanal	0
Enheds Format	 PAL
Capture Palette	 JPEG
Capture Width (pixels)	 320
Capture Height (pixels) 280	
Preserve Aspect Ratio	
Orientation	   Normal

Can someone tell me if this is not possible or something else is wropng/missing here ????

TIA

Per