isight does not work in ubuntu gutsy - Video for Linux 2 (v4l2): Could not get buffers from device '/dev/video0'.

[pliz]

I am running the latest update of gutsy. Ekiga shows only top fourth of the camera output. Although each time I restart it it gets the static picture - and only that top fourth is live video. Gstreamer-properties gives me the following message when I run video capture test:
Video for Linux 2 (v4l2): Could not get buffers from device '/dev/video0'.

[JulienM (julien-maillard)]

I had the same problem on MacBook Pro rev3 and built-in isight with ekiga. I have updated pwlib_1.10.7 to 1.10.9 and that solved the problem.

[JulienM (julien-maillard)]

For gstreamer i found interesting bug report: http://bugzilla.gnome.org/show_bug.cgi?id=467214. This bug has been fixed in gstreamer.
We just need to wait an update of gst-plugins-good package.

[pliz (pliz)]

JulienM, thanks for the info. Hopefully this is all gets into the distribution by the time gutsy is out

[Daniele Dellafiore (ildella)]

I can report behavior on my MBP, gutsy up to date.
In Ekiga the webcam works. But I have some cases in which it does not.

# gst-launch-0.10 v4l2src queue-size=2 ! ffmpegcolorspace ! xvimagesink
Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /pipeline0/v4l2src0: Could not negotiate format
Additional debug info:
gstbasesrc.c(2062): gst_base_src_start (): /pipeline0/v4l2src0:
Check your filtered caps, if any
Setting pipeline to NULL ...
FREEING pipeline ...

and...

# mencoder tv:// -tv driver=v4l2:width=320:height=240:device=/dev/video0 -ovc lavc -o webcam.avi
MEncoder 2:1.0~rc1-0ubuntu11 (C) 2000-2006 MPlayer Team
CPU: Genuine Intel(R) CPU 1500 @ 2.00GHz (Family: 6, Model: 14, Stepping: 8)
CPUflags: Type: 6 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled with runtime CPU detection.
success: format: 9 data: 0x0 - 0x0
TV file format detected.
Selected driver: v4l2
 name: Video 4 Linux 2 input
 author: Martin Olschewski <email address hidden>
 comment: first try, more to come ;-)
v4l2: ioctl get standard failed: Invalid argument
Selected device: Built-in iSight
 Capabilites: video capture streaming
 supported norms:
 inputs: 0 = Camera;
 Current input: 0
 Current format: UYVY
v4l2: ioctl set format failed: Device or resource busy
v4l2: ioctl set mute failed: Invalid argument
v4l2: 0 frames successfully processed, 0 frames dropped.
Segmentation fault (core dumped)

finally (maybe this is right...)

#cat /dev/video0
cat: /dev/video0: No such device

[pliz (pliz)]

It works on the latest gutsy update on my Mac Book Pro v3. May be the bug should be closed?

[Gabriele Tassoni (gabriele-tassoni)]

No, it's still not working properly, gutsy updated as of today, gstreamer just can test the isight webcam at 320x240 resolution, program gstreamer based like cheese, that default to 640x480, and the gstreamer itself when launched at 640x480 (gst-launch-0.10 v4l2src ! video/x-raw-yuv,format=\(fourcc\)UYVY,width=640,height=480 ! ffmpegcolorspace ! ximagesink) still freeze, so this bug is not to be closed, imho.

[Michael Z. Krog (mic-apaq)]

I also have the problem on my macbook.

The following just seems to run but never shows a window:
gst-launch-0.10 v4l2src ! video/x-raw-yuv,format=\(fourcc\)UYVY,width=640,height=480 ! ffmpegcolorspace ! ximagesink

The following works:
gst-launch-0.10 v4l2src ! video/x-raw-yuv,format=\(fourcc\)UYVY,width=320,height=240 ! ffmpegcolorspace ! ximagesink

Has updated to latest gutsy at 2007-11-24

[Ali Sabil (asabil)]

still not fixed with a macbook 1st gen

[Sense Egbert Hofstede (sense)]

This bug can be confirmed since it's being worked upon upstream. I'm adding the upstream bug reports to launchpad's bug watch.

[marcowave (marcowave)]

same problem here with a macbookpro core duo 1st gen...

is there a way to set default resolution for cheese and skype to 320x240?

[Lennart Regebro (regebro-gmail)]

This problem has re-appeared in 11.10. A way to set the default format for gstreamer would solve it.