[gst-devel] Help with complicated RTPBin pipeline

[Marco Ballesio]

Hi,

On Mon, Sep 20, 2010 at 7:10 AM, Andy Savage <andy at bluewire.net.nz> wrote:

> Hi there,
>
> I need a little bit of help with a long gstreamer pipeline and
> sending/receiving video/audio. I have two pipelines which work
> successfully...
>
> *Sending Video*
> gst-launch gstrtpbin name=rtpbin latency=0 ksvideosrc device-index=0
> typefind=true ! typefind ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,
> width=640, height=480 ! videorate ! video/x-raw-yuv, framerate=15/1 !
> ffenc_mpeg4 ! rtpmp4vpay send-config=true ! rtpbin.send_rtp_sink_0
> rtpbin.send_rtp_src_0 ! udpsink port=5502 host=192.168.10.175
> rtpbin.send_rtcp_src_0 ! udpsink port=5510 host=192.168.10.175 sync=false
> async=false udpsrc port=5510 ! rtpbin.recv_rtcp_sink_0 autoaudiosrc
> samplesperbuffer=1000 ! alawenc ! rtppcmapay ! rtpbin.send_rtp_sink_1
> rtpbin.send_rtp_src_1 ! udpsink port=5504 host=192.168.10.175
> rtpbin.send_rtcp_src_1 ! udpsink port=5512 host=192.168.10.175 sync=false
> async=false udpsrc port=5512 ! rtpbin.recv_rtcp_sink_1
>
> *Receiving Video*
> gst-launch gstrtpbin name=rtpbin2 latency=0 udpsrc caps="application/x-rtp,
> media=(string)video, clock-rate=(int)90000, encoding-name=(string)MP4V-ES,
> profile-level-id=(string)1" port=5502 ! rtpbin2.recv_rtp_sink_0 rtpbin2. !
> rtpmp4vdepay ! ffdec_mpeg4 ! ffmpegcolorspace ! autovideosink udpsrc
> port=5510 ! rtpbin2.recv_rtcp_sink_0 rtpbin2.send_rtcp_src_0 ! udpsink
> host=192.168.10.175 port=5510 sync=false async=false udpsrc
> caps=application/x-rtp,media=(string)audio,clock-rate=(int)8000,encoding-name=(string)PCMA
> port=5504 ! rtpbin2.recv_rtp_sink_1 rtpbin2. ! rtppcmadepay ! alawdec !
> autoaudiosink buffer-time=10000 udpsrc port=5512 ! rtpbin2.recv_rtcp_sink_1
> rtpbin2.send_rtcp_src_1 ! udpsink host=192.168.10.175 port=5512 sync=false
> async=false
>
> I wanted to combine them so that I could have sending/receiving in one
> pipeline. Is this possible?
>

I've tried something like that a few months ago and it didn't work (even if
using an application instead of gst-launch). As I didn't have much time to
dig I just continued using two separate pipelines.


>
> Right now I simply launch two gstreamer instances (one for sending, one for
> receiving). The problem is that in the receiving instance I would like to
> access the local camera and place it as a local preview window into the
> receiving video. This works fine but the problem is, you can't have two
> gstreamer instances accessing the camera. I thought if I could combine the
> above into one pipeline I could use tee and split them then there would only
> ever be one instance of the camera used at once.
>

Can't you put a tee in the sending pipeline and attach for instance an
xvimagesink to it? In case you're not sending data (no rtp involved) it's
even simpler, as you just need a kind-of v4lsrc ! xvimagesink pipe.

Regards


>
> *If I simply combine the above two into something like:*
> gst-launch \
> gstrtpbin name=rtpbin latency=0 ksvideosrc device-index=0 typefind=true !
> typefind ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv, width=640,
> height=480 ! videorate ! video/x-raw-yuv, framerate=15/1 ! ffenc_mpeg4 !
> rtpmp4vpay send-config=true ! rtpbin.send_rtp_sink_0 rtpbin.send_rtp_src_0 !
> udpsink port=5502 host=192.168.10.175 rtpbin.send_rtcp_src_0 ! udpsink
> port=5510 host=192.168.10.175 sync=false async=false udpsrc port=5510 !
> rtpbin.recv_rtcp_sink_0 autoaudiosrc samplesperbuffer=1000 ! alawenc !
> rtppcmapay ! rtpbin.send_rtp_sink_1 rtpbin.send_rtp_src_1 ! udpsink
> port=5504 host=192.168.10.175 rtpbin.send_rtcp_src_1 ! udpsink port=5512
> host=192.168.10.175 sync=false async=false udpsrc port=5512 !
> rtpbin.recv_rtcp_sink_1 \
> gstrtpbin name=rtpbin2 latency=0 udpsrc caps="application/x-rtp,
> media=(string)video, clock-rate=(int)90000, encoding-name=(string)MP4V-ES,
> profile-level-id=(string)1" port=5502 ! rtpbin2.recv_rtp_sink_0 rtpbin2. !
> rtpmp4vdepay ! ffdec_mpeg4 ! ffmpegcolorspace ! autovideosink udpsrc
> port=5510 ! rtpbin2.recv_rtcp_sink_0 rtpbin2.send_rtcp_src_0 ! udpsink
> host=192.168.10.175 port=5510 sync=false async=false udpsrc
> caps=application/x-rtp,media=(string)audio,clock-rate=(int)8000,encoding-name=(string)PCMA
> port=5504 ! rtpbin2.recv_rtp_sink_1 rtpbin2. ! rtppcmadepay ! alawdec !
> autoaudiosink buffer-time=10000 udpsrc port=5512 ! rtpbin2.recv_rtcp_sink_1
> rtpbin2.send_rtcp_src_1 ! udpsink host=192.168.10.175 port=5512 sync=false
> async=false
>
> It doesn't appear to work... gstreamer starts successfully but I can't
> recieve video on either end
>
> Has this been attempted before? Is there a best way to do it? (I presume
> people normally use two pipelines?)
>
> Kind regards,
> Andy Savage
>
>
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