[gst-devel] Video capturing using Video 4 linux

[S.Abdullah]

Hi,
   I am trying to  capture video using Video 4 linux Linux interface and GStreamer 0.10. I am getting message 
 ++++++++++++++++++++++++++++++++++++++++++
 WARNING: erroneous pipeline: no element "xvimage"
 abdullah at ubuntu007:~/Nokia/Downloads$ gst-launch-0.10 --gst-debug=v4lsrc:5 v4lsrc device=/dev/video0 ! filesink location=test4.yuv
 Setting pipeline to PAUSED ...
 DEBUG (0x80509a0 - 0:00:00.389615000)               v4lsrc(32150) gstv4lsrc.c(387):gst_v4lsrc_get_caps:<v4lsrc0> Checking supported palettes
 DEBUG (0x80509a0 - 0:00:02.059468000)               v4lsrc(32150) gstv4lsrc.c(393):gst_v4lsrc_get_caps:<v4lsrc0> Added palette 15 (YUV-4:2:0 (planar)/I420) to supported list
 DEBUG (0x80509a0 - 0:00:02.060406000)               v4lsrc(32150) gstv4lsrc.c(398):gst_v4lsrc_get_caps:<v4lsrc0> 1 palette(s) supported
 DEBUG (0x80509a0 - 0:00:02.060473000)               v4lsrc(32150) gstv4lsrc.c(400):gst_v4lsrc_get_caps:<v4lsrc0> autoprobing framerates
 DEBUG (0x80509a0 - 0:00:11.965367000)               v4lsrc(32150) gstv4lsrc.c(425):gst_v4lsrc_get_caps:<v4lsrc0> Device reports w: 160-640, h: 120-480, fps: 75/16 for palette 15
 DEBUG (0x80509a0 - 0:00:11.965577000)               v4lsrc(32150) gstv4lsrc.c(454):gst_v4lsrc_get_caps:<v4lsrc0> caps: video/x-raw-yuv, format=(fourcc)I420, width=(int)[ 160, 640 ], height=(int)[ 120, 480 ], framerate=(fraction){ 75/16, 45/8, 105/16, 15/2, 135/16, 75/8, 165/16, 45/4, 195/16, 105/8, 225/16, 15/1, 255/16, 135/8, 285/16, 75/4, 315/16, 165/8, 345/16, 45/2, 375/16, 195/8, 405/16, 105/4, 435/16, 225/8 }
 DEBUG (0x80509a0 - 0:00:11.966013000)               v4lsrc(32150) gstv4lsrc.c(215):gst_v4lsrc_fixate:<v4lsrc0> device reported w: 160-640, h: 120-480
 DEBUG (0x80509a0 - 0:00:11.966175000)               v4lsrc(32150) gstv4lsrc.c(231):gst_v4lsrc_fixate:<v4lsrc0> targetting 160x120
 DEBUG (0x80509a0 - 0:00:11.966406000)               v4lsrc(32150) gstv4lsrc.c(506):gst_v4lsrc_set_caps:<v4lsrc0> linking with 160x120 at 75/16 fps
 DEBUG (0x80509a0 - 0:00:11.994747000)               v4lsrc(32150) gstv4lsrc.c(594):gst_v4lsrc_set_caps:<v4lsrc0> trying to set_capture 160x120, palette 15
 ERROR: Pipeline can't PREROLL ...
 Setting pipeline to PLAYING ...
 New clock: GstSystemClock
 +++++++++++++++++++++++++++++++++++++++++++
 The pipeline seems to be paused and then eventually set to playing after v4l gstremaer plugin probes the v4l interface.
 
 The problem may be coming from pwc caerma driver and v4l interface.
 System Details are:
 Linux (Ubuntu 5.04)
 kernel 2.6.10-5-386
 Webcam logitech webcam pro 4000
 ........
 Gstrmer is able to store the the raw video stream but pipeline initially gets stuck.
 Any idea why htis is happening
 
 
 br,
 Abdullah
 
		
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