[GEM-dev] uvc webcam (eee pc 900 built in) with pix_video?
ben at ekran.org
ben at ekran.org
Mon May 11 01:33:34 CEST 2009
hey all,
I'm doing a workshop in HK in about 13 days.
I wanted to demo pix_video, but I can't seem to get things working on my
eee pc.
The device is working with v4l2, I can get a feed from mplayer with:
mplayer tv:// -tv driver=v4l2:device=/dev/video0:fps=30
seems generic enough. Here is the output regarding video format:
Opening video decoder: [raw] RAW Uncompressed Video
VDec: vo config request - 640 x 480 (preferred colorspace: Packed YUY2)
VDec: using Packed YUY2 as output csp (no 0)
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 640x480 => 640x480 Packed YUY2
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
I'm working with an svn copy of GEM updated yesterday. I'm configuring with:
./configure --prefix=/usr --without-libv4l1 --with-libv4l2-libs=/usr/lib/
--with-libv4l2-includes=/usr/include/
and GEM complains about the camera when I start pix_video (and I get no
video image):
v4l: VDIOCGCHAN: Invalid argument
This device/camera must only have one channel?
I can't tell if I'm using v4l1 or 2. configure tells me v4l: yes not
matter if its v4l1 or v4l2 I enable. I also have a vague memory that
configure should tell me what v4l its using, like:
v4l: yes (libv4l2)
but I can't get that output with any combination of flags. Did I imagine it?
Anyhow let me know if anyone has a working uvc webcam in gem
(linux-intrepid) or better yet working eeepc webcam.
Thanks all.
Here is a link to what I'm doing here in HK:
http://www.videotage.org.hk/projects/20090514_dreamingmachine.htm
I'll have to make another post about some issues with pix_crop, and
pix_buffer save, which forced me to change some aspects of the project!
..b..
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