Problem with rtpbin and rtph264depay

[Philippe Lalevée]

Hi,
I fixed typos in my mail...
And I would add that I have two "pad-added" signals with strictly the 
same pad names; output of callback calls below:
psa_listener_pad_cb: new pad: '*rtpbin:recv_rtp_src_1_1993189537_96*' to 
'depay_v':  failed (-4)
psa_listener_pad_cb: new pad: '*rtpbin:recv_rtp_src_1_1993189537_96*' to 
'depay_a':  success
Have you an idea of what happens?
Philippe

Le 03/02/2019 à 14:10, Philippe Lalevée a écrit :
> Hello,
> I have a problem of connection between rtpbin and rtph264depay (maybe 
> the problem is elsewhere).
> Here is my pipelines, which executes correctly with gst-launch...
> Talker machine :
> gst-launch-1.0 rtpbin name=rtpbin filesrc location=video.mp4 ! qtdemux 
> name=d
>     d.audio_0 ! aacparse ! rtpmp4apay mtu=524 ! rtpbin.send_rtp_sink_1
>     d.video_0 ! decodebin ! x264enc ! rtph264pay ! rtpbin.send_rtp_sink_0
>     rtpbin.send_rtp_src_1 ! udpsink port=5004 host=$IP sync=false 
> async=false
>     rtpbin.send_rtcp_src_1 ! udpsink port=5005 host=$IP sync=false 
> async=false
>     udpsrc port=5007 ! rtpbin.recv_rtcp_sink_1
>     rtpbin.send_rtp_src_0 ! udpsink port=5000 host=$IP sync=true 
> async=false
>     rtpbin.send_rtcp_src_0 ! udpsink port=5001 host=$IP sync=false 
> async=false
>     udpsrc port=5003 ! rtpbin.recv_rtcp_sink_0
>
> Listener machine:
> gst-launch-1.0 rtpbin name=rtpbin
>    udpsrc caps=$VCAPS port=5000 ! rtpbin.recv_rtp_sink_0
> *rtpbin.recv_rtp_src_0 ! rtph264depay* ! decodebin ! videoconvert ! 
> autovideosink
>     udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0
>     rtpbin.send_rtcp_src_0 ! udpsink port=5003 host=$IP sync=false 
> async=false
>     udpsrc caps=$ACAPS port=5004 ! rtpbin.recv_rtp_sink_1
>     rtpbin.send_rtp_src_1 ! rtpmp4adepay ! avdec_aac ! audioconvert ! 
> alsasink
>     udpsrc port=5005 ! rtpbin.recv_rtcp_sink_1
>     rtpbin.send_rtcp_src_1 !
>     udpsink port=5007 host=$IP sync=false async=false
>
> ...but not in an application. The problem is on listener side: 
> rtph264depay refuse to link to recv_rtp_src_0 of rtpbin, instead it 
> try to link with recv_rtp_src_1, which is not correct, because this is 
> an "audio pad (consequently, the error code -4 is returned, meaning 
> "pads do not have common format"). Naturally, there is no problem for 
> rtpmp4adepay. And, if I connect first rtpmp4adepay, it normally uses 
> the pad recv_rtp_src_1, but rtph264depay want to use the same pad 
> (why?), and then the error code -2 is returned, meaning "pad was 
> already linked".
>
> To make the links, I use the signal "pad-added" with g_signal_connect, 
> and in the callback, I use gst_element_link to make the link. I have 
> no problem with other links...
>         g_signal_connect(recv_rtpbin, "pad-added", 
> G_CALLBACK(psa_listener_pad_cb), depay_video);
>         g_signal_connect(recv_rtpbin, "pad-added", 
> G_CALLBACK(psa_listener_pad_cb), depay_audio);
>
> As recv_rtp_src_1 is a audio pad, then incompatible with rtph264depay, 
> how to force linking of rtph264depay to a specific pad (here 
> recv_rtp_src_0) for this plugin?
>
> Else have you an idea of the problem?
>
> Thanks,
> Philippe
>
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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