RTSP server with camera

[Wim Taymans]

On 03/26/2013 10:39 AM, Philip Craig wrote:
> Hi,
>
> I'm trying to use gst-rtsp-server to stream live video from a camera.
> I've modified the test-launch.c example, and have it working for a
> single media.
>
> Now I want to allow multiple media. The problem I have is that
> gst-rtsp-server creates a separate pipeline for each media. This
> doesn't work because I can only have a single camera capture element.
>
> This seems like a fairly common thing to want to do. Has anyone solved
> this problem, or does anyone have a recommendation for how to
> proceeed?
Use gst_rtsp_media_factory_set_shared() to share one pipeline to multiple
clients.

Wim

>
> The way I would expect to solve this is to have a single pipeline and
> dynamically update it for each new media. That doesn't seem to fit
> well with the current gst-rtsp-server design though, because
> GstRTSPMedia wants full control of the pipeline. I haven't found
> evidence of anyone doing this. I did find someone else who ran into
> the same difficulty though
> (http://lists.freedesktop.org/archives/gstreamer-devel/2011-September/033174.html)
>
> The other option that I can see is to create multiple pipelines, and
> forward the data between them using something like appsrc, TCP, or
> shared memory. Is there any documentation on how to do this? I've
> tried doing this with TCP, but I'm quite new to gstreamer and I don't
> understand all the details of caps specifications and clocks. Here's
> the pipelines I'm trying to use, but they are slow to connect and the
> latency is high (I've seen up to 30 seconds).
>
> My capture pipeline is:
> gst-launch v4l2src ! gdppay ! tcpserversink host=localhost port=1234
>
> I can display this with zero latency using:
> gst-launch tcpclientsrc host=localhost port=1234 ! gdpdepay !
> xvimagesink sync=false
>
> The bin that I am using in the rtsp-server is:
> "( tcpclientsrc host=localhost port=1234 ! gdpdepay ! ffmpegcolorspace
> ! x264enc tune=zerolatency ! rtph264pay name=pay0 pt=96 )"
>
> and the rtspclient is:
> gst-launch rtspsrc location=rtsp://127.0.0.1:8554/test ! rtph264depay
> ! ffdec_h264 ! xvimagesink sync=false
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