libv4l2: error dequeuing buf: Input/output error

2009-11-15 Thread bifferos

Hi all,

Can anyone give any clue as to why I might get this error 
when capturing from a PAC207 webcam?  It happens after a 6-7 
second delay when capturing.

I've seen this with 2.6.30.1, 2.6.30.5 and 2.6.32-rc7, however 
I can run the same camera on another (much faster) system using 
the same kernel(s) and same gspca driver and it works fine, 
making me think this is a timing issue.

I'm testing with the v4lgrab.c program, compiled statically 
against libv4l2.  A quick google indicates I'm not the only
one encountering the problem. 

thanks,
Biff.


  
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Re: libv4l2: error dequeuing buf: Input/output error

2009-11-15 Thread Sean
There have been some improvements to gspca_main and gspca_pac207 
recently, as well as pac207 specific improvements in libv4l2. Are you 
using the latest v4l-dvb and libv4l2? I get some slowdown halfway when 
using capture-example.c and it seems to improve when I use the latest 
v4l-dvb and libv4l2 from mercurial. http://linuxtv.org/hg/v4l-dvb


Sean

bifferos wrote:

Hi all,

Can anyone give any clue as to why I might get this error 
when capturing from a PAC207 webcam?  It happens after a 6-7 
second delay when capturing.


I've seen this with 2.6.30.1, 2.6.30.5 and 2.6.32-rc7, however 
I can run the same camera on another (much faster) system using 
the same kernel(s) and same gspca driver and it works fine, 
making me think this is a timing issue.


I'm testing with the v4lgrab.c program, compiled statically 
against libv4l2.  A quick google indicates I'm not the only
one encountering the problem. 


thanks,
Biff.


  
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