INFO:: periodic_channel_available: Total channels: 8, Periodic: 5, Non-periodic: 3 usbcore: registered new interface driver uvcvideo usb 1-1.3.3: New USB device strings: Mfr=0, Product=0, SerialNumber=2 usb 1-1.3.3: New USB device found, idVendor=046d, idProduct=0809 Hope it saves someone else the fruitless few hours I spent trying to figure out why my images looked so bad.Ĭode: Select all usb 1-1.3.3: new high speed USB device number 7 using dwc_otg Since I'm running headless, I use v4l2-ctl to modify the webcam controls before starting the stream. All that is needed to correct the image is to tweak those. In the end it turns out that with my Logitech Quickcam 9000, none of the brightness/contrast/saturation controls are initialised to sensible defaults. I couldn't find anything which looked wrong in the code.

I initially thought that something was up with using the V4L2 header with the code, and spent a couple of evenings familiarising myself with the differences between the APIs. You could see the general shape of things in there, but it was unusable. I was severely disappointed with the pictures from the webcam - they were mostly black with bits of red or green dashed about. Luckily it seems that V4L2 is already supported with this software. It does however have videodev2.h, so I tried just making a soft link and the software compiled. The software did not compile immediately, since my distribution does not have the videodev.h include. Quick googling suggested mjpeg-streamer would be the thing I needed. Not having used a webcam with Linux before, I didn't have any idea what kind of command line tools were available to run it - I wanted to capture the stream and send it over the LAN to a browser on another machine so the Pi can run headless. I thought this might be a useful tale for anyone trying to get a webcam to work with their Pi.

Logitech quickcam pro 3000 raspberry pi