[Bug 767102] New: decodebin: hits ASSERT with H264 byte-stream as input

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=767102

            Bug ID: 767102
           Summary: decodebin: hits ASSERT with H264 byte-stream as input
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: phil at base-art.net
        QA Contact: gstreamer-bugs at lists.freedesktop.org
                CC: hfink at toolsonair.com, slomo at coaxion.net,
                    t.i.m at zen.co.uk, vivia at ahiru.eu
        Depends on: 764948
     GNOME version: ---

+++ This bug was initially created as a clone of Bug #764948 +++

I have a custom src element which is a bin storing 2 appsrc elements. When the
first appsrc element exposes its src pad and the bin propagates this pad, it
triggers the pad-added decodebin signal and the following assert is hit.

**
ERROR:gstdecodebin2.c:1746:analyze_new_pad: assertion failed: (chain->elements
!= NULL)
SIGNAL [6] at address 0xc53!

Reverting the chain->demuxer = TRUE change in
2b536467154ed672be8b49a9681693607723cc60 prevents the assert to hit.

I'll try to dump the pipeline graph before the crash happens.

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