RE: libv4l2: error dequeuing buf: Resource temporarily unavailable

["Charlie X. Liu" <charlie@xxxxxxxxxxxx>]

Your driver load may not be quite right or got some conflicts. According to: http://www.kernel.org/doc/Documentation/video4linux/CARDLIST.saa7134, the Terratec Cinergy 400 TV should be card=8. Have you tried: restart, "modprobe -r saa7134", "modprobe saa7134 card=8", "dmesg | grep saa7134", and checked if the Terratec Cinergy 400 TV showed up correctly? If right, it should be Ok:

ffmpeg -f video4linux2 -i /dev/video0 out.mpg
ffmpeg -t 30 -f video4linux2 -s vga -r 30 -b 2000k -i /dev/video0 out-vga-2M-30sec.mpg
ffmpeg -t 60 -f video4linux2 -s vga -r 30 -b 2000k -i /dev/video0 out-vga-2M-60sec.avi
..., etc.


-----Original Message-----
From: linux-media-owner@xxxxxxxxxxxxxxx [mailto:linux-media-owner@xxxxxxxxxxxxxxx] On Behalf Of llarevo@xxxxxxx
Sent: Saturday, July 14, 2012 4:29 AM
To: linux-media@xxxxxxxxxxxxxxx
Subject: libv4l2: error dequeuing buf: Resource temporarily unavailable

Hi,

I'm not sure, if this is the right list, if I'm wrong here, a hint for a appropriate place for my questions would be very appreciated.

I have a problem with an analog Terratec Cinergy 400 TV. When I try to capture with ffmpeg, 

ffmpeg -f video4linux2 -i /dev/video0 out.mpg

I get the error

libv4l2: error dequeuing buf: Resource temporarily unavailable

I'm using Fedora F17. 

The behavior seems to be pretty strange to me, because xawtv, mencoder, mplayer and tvtime don't have a problem with the hardware at all, ffmpeg has got this problem only with the hardware mentioned above, with a Terratec Cinergy XS, ffmpeg captures without problems.

Why reports libv4l2 "Resource temporarily unavailable"? What are common reasons for that message? What can be a reason that creates the message only on specific hardware (Terratec Cinergy 400 TV)?

Thanks a lot in advance. 

--
Felix


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