Re: V4L #defines for Quickcam (was: Re: buggy v4l apps)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



On Tue, 5 Aug 2003, Ronald Bultje wrote:

>> Then some cameras supported by qc-usb can deliver MJPEG compressed frames
>> and I have used
>> #define VIDEO_PALETTE_MJPEG     (('q'<<8) | 2)  /* Grab video in compressed MJPEG format */

>It's likely RGB JFIF/JPEG, isn't it? MJPEG is supposed to be YUY2

No. Looks like it's in 4:2:2 packed format (YUY2, I guess). I didn't write
the decompression code (just ported it to run in kernel, ahem, it's from
mpeg2dec by Aaron Holtzman), so I'm only 99% sure.

The format is used by QuickCam Web and LEGO cam.




[Index of Archives]     [Linux DVB]     [Video Disk Recorder]     [Asterisk]     [Photo]     [DCCP]     [Netdev]     [Xorg]     [Util Linux NG]     [Xfree86]     [Free Photo Albums]     [Fedora Users]     [Fedora Women]     [ALSA Users]     [ALSA Devel]     [Linux USB]

Powered by Linux