A follow up to clarify:
I saw the posts from David Ellingsen. I do not have the same problem (I
do use all the required flags for the mmap). However, looking at dmesg,
I see something strange:
MJPEG: using 2 buffers of size 128 KB
Is that buffers specifically for compressed capture, or is it allocating
too little memory for my intended use? Note also that there is no
notation
Heartened, I tried running my code using a lower resolution. I set it to
240x180. First, VIDIOCSWIN will apparently fail on anything that isn't
the full resolution of the card. Recklessly, I commented out the setting
of this ioctl and ran again. What I get is a black window (ie. no data
has actually been grabbed). There seems to be several issues at play
here.
First, apparently just making sure there is unallocated memory set at
boot time seems inadequate.
Um, one other thing: I am setting char-major-81 as videodev, then "above
videodev zr36067" in modules.conf - I may have misunderstood some docs.
Is this still ok (everything else works)?
--
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Tel. +46-046 222 8588 Dr. Janne Mor�n (mr)
Home: +46-046 211 4973 Dept. of Cognitive Science
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