Um, do you mean VIDIOC_G_FMT/VIDIOC_S_FMT? There is no VIDIOC_S_CAP ioctl. Even so libv4l does indeed use the VIDIOC_S_FMT ioctl to set the cameras format to what it will be using. Also libv4l does not always use the jpeg format. Its just that for larger resolutions it will decided to use a compressed format if supported by your webcam. Try using 160x120 resolution and it should go with uncompressed bayer format. At least it does for mine.
On Mon, Dec 1, 2008 at 4:05 AM, GWater <[EMAIL PROTECTED]> wrote: > OrionFyre schrieb: >> >> I just acquired this camera from a friend. and have followed the >> instructions. I am getting a green output as well >> >> bash-3.2# lsusb >> Bus 007 Device 007: ID 0c45:6282 Microdia >> >> bash-3.2# dmesg | tail >> usb 7-2: new high speed USB device using ehci_hcd and address 7 >> usb 7-2: configuration #1 chosen from 1 choice >> microdia: Microdia USB 2.0 Webcam - 0C45:6282 plugged-in. >> microdia: Detected SN9C20X Bridge >> microdia: Detected MT9M111 Sensor >> microdia: Microdia USB 2.0 Webcam is now controlling video device /dev/ >> video0 >> 7:2:1: cannot get freq at ep 0x84 >> >> >> I too have only a green screen which is divided in two horizontally in >> Skype and aMSN where the bottom half has random horizontal noise and >> the top half is divided in two vertically where the right and left >> appear to be much like an alpha channel for two separate colors. >> >> On Nov 26, 2:08 pm, "Dave Neuer" <[EMAIL PROTECTED]> wrote: >>> >>> On Tue, Nov 25, 2008 at 10:50 PM, Dave <[EMAIL PROTECTED]> wrote: >>> >>>> Sorry, I don't really follow... what am I trying now? lol >>> >>> git clonehttp://repo.or.cz/r/microdia.git >>> cd microdia >>> make >>> modprobe videodev >>> modprobe compat-ioctl32 >>> insmod microdia.ko exposure=23000 >>> >>> >>> >>>> Thanks again! >>> >>> Don't thank me yet ;-) >>> >>> Dave >> >> >> > > I think I know what the problem here is: > > libv4l supports EVERYTHING. Therefore it uses VIDIOC_G_CAP instead fo > VIDIOC_S_CAP. The difference is that only VIDIOC_S_CAP applies the encoding > setting on the sensor and the bridge. We have been lucky so far since > sn9c20x_initialize() contains the JPEG setting by default and libv4l always > chose that. > > But if libv4l is choosing another encoding the sensor and bridge are > currently not prepared for that. > > (No, I didn't just make that up. I investigated this the whole weekend > because I always wondered why bayer never worked.) > > GWater > > --~--~---------~--~----~------------~-------~--~----~ Lets make microdia webcams plug'n play, (currently plug'n pray) To post to this group, send email to [email protected] Visit us online https://groups.google.com/group/microdia -~----------~----~----~----~------~----~------~--~---
