Error reading an IP camera MJPEG stream

[Icarus Alive]

Hi,

Got a rather tacky little east-asian IP camera (apparently a Foscam
knock-off), and trying to write a little DIY DVR (of sorts) for it on
Linux (Debian 'Sid'). Here's the command I use:

icarus at crunchex:~$ gst-launch-0.10 -v souphttpsrc
location=http://icarus:icarus123@192.168.1.20:8012/videostream.cgi
do-timestamp=true ! multipartdemux ! jpegdec ! autovideosink

and here's what I get.

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:sink: caps = image/jpeg
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps =
video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480,
framerate=(fraction)0/1
ERROR: from element
/GstPipeline:pipeline0/GstSoupHTTPSrc:souphttpsrc0: Internal data flow
error.
Additional debug info:
gstbasesrc.c(2582): gst_base_src_loop ():
/GstPipeline:pipeline0/GstSoupHTTPSrc:souphttpsrc0:
streaming task paused, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:src: caps = NULL
/GstPipeline:pipeline0/GstJpegDec:jpegdec0.GstPad:sink: caps = NULL
/GstPipeline:pipeline0/GstMultipartDemux:multipartdemux0.GstPad:src_0:
caps = NULL
Freeing pipeline ...

The username/password for the challenged domain is correct, as I can
test it with exact same URL in Firefox, and similarly in vlc. Could
someone suggest what I should be checking and what might be wrong ?

On reading around, I found 2 different syntaxes on reading MJPEG
streams off IP cams, and not sure which one is to be used, and what's
the difference --

Approach-1: (writes to file)
gst-launch -v souphttpsrc location=http://10.11.12.13/mjpeg
do-timestamp=true ! multipartdemux
   ! image/jpeg,width=640,height=480 ! matroskamux
   ! filesink location=mjpeg.mkv

Approach-2: (displays on local display device)
gst-launch souphttpsrc
location=http://admin:1234@192.168.1.150/mjpg/video.mjpg timeout=5 !
jpegdec ! glimagesink force-aspect-ratio=true

In first approach, there's a step of demuxing multipart encoded JPEGs,
and then possibly specifying image decode with certain attributes. In
second approach I don't see any multipart encode handling, and direct
invocation of jpeg-decoder.

In my setup, I don't even seem to have a glimagesink though !


~ Icarus