Little help with M/Jpeg encoding and streaming
Ian Daley
ian at nian.com.au
Mon Nov 28 08:25:55 PST 2011
Hi there,
I am working on developing an app with gstreamer (or hoping to!) that
will pickup the image from a wireless IP cam and then relay this to a
web server. I will have multiple cameras, but I guess we'll get to that
later, because right now, I'm a little stuck (and perhaps a little tired
being 2 AM) and need a little bit of guidance.
Essentially I have a video source from an IP Camera that is in mjpeg
format. I currently access this through souphttpsrc via the following
method:
gst-launch -v souphttpsrc
location="http://192.168.1.195/videostream.cgi?user=admin&pwd="
do-timestamp=true is_live=true ! multipartdemux ! tcpserversink port=5000
and play it back via:
gst-launch tcpclientsrc port=5000 ! jpegdec ! autovideosink
Which is simple enough... I guess, somewhere to get started. This works,
but of course, I don't want to stream in mjpeg, I would rather convert
this to something more browser friendly... this is where the problems begin.
If I try to convert it to theora I get:
gst-launch -v souphttpsrc
location="http://192.168.1.195/videostream.cgi?user=admin&pwd="
do-timestamp=true is_live=true ! multipartdemux ! jpegdec ! videoscale
method=1 ! video/x-raw-yuv,width=320,height=240 ! theoraenc bitrate=150
! tcpserversink port=5000
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/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(2574): gst_base_src_loop ():
/GstPipeline:pipeline0/GstSoupHTTPSrc:souphttpsrc0:
streaming task paused, reason not-negotiated (-4)
Execution ended after 50288828 ns.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
/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
Setting pipeline to NULL ...
Freeing pipeline ...
In fact... I pretty much get this with most attempts to convert it to
something browser friendly.
Anyone got any ideas on what would be the best way to encode this stream
into something that can be picked up and handled easily in browsers?
FWIW, even the mjpeg stream doesn't work natively in Firefox, but the
source does.
Kind Regards
Ian
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