[Bug 747839] New: gst-rtsp-server: Doesn't perfrom retransmission to both streams in test-video-rtx.

GStreamer (GNOME Bugzilla) bugzilla at gnome.org
Tue Apr 14 03:04:57 PDT 2015


https://bugzilla.gnome.org/show_bug.cgi?id=747839

            Bug ID: 747839
           Summary: gst-rtsp-server: Doesn't perfrom retransmission to
                    both streams in test-video-rtx.
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-rtsp-server
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: zzoon.ko at samsung.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

There are 2 problems.

1. Duplicated call of g_signal_connect
During start-up of test-video-rtx, it makes signal handler by code below.
- g_signal_connect (rtpbin, "request-aux-sender", (GCallback)
request_aux_sender, stream);
In case of 2 streams, in the second call of request_aux_sender, userdata is not
the second stream but the first stream, which is previous stream.
Even though it makes another aux sender bin, but it's not doing retransmission
because rtx_pt_map is same as the first aux sender.
In this case, signal handler needs to be removed, and makes new handler.

2. In case that payload type is different.
In this test-code, it makes pipeline with PCMA payloader, which has "pt=97"
But it's changed to 8 later according to spec. 
Because of this, audio retransmission always failed. Audio's aux sender has
wrong rtx_pt_map.
IMHO, rtx_pt_map has to be updated in this case. But I'm not sure it's valid.

I'm working on this issue, but I want to hear some advice.
Thanks

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