[Bug 728312] New: Null caps is returned by id3demux when query caps from it.

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=728312
  GStreamer | gst-plugins-base | 1.2.3

           Summary: Null caps is returned by id3demux when query caps from
                    it.
    Classification: Platform
           Product: GStreamer
           Version: 1.2.3
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: zmafox at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=274414)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=274414)
the log file that query caps.

Hi:

    I have an mpeg2 file which has some id3_v1 data in the end of file, when i
tried to play the file with playbin, an id3demux was created ahead of my demux.
as no caps event was send from id3demux, i tried to query the caps from the
peer pad of sink pad in my demux to load library for particular file type.
however, Null caps is returned from id3demux.
    I have checked the gst_tag_demux_pad_query() in gsttagdemux.c and I wonder
why it does not handle GST_QUERY_CAPS and return the caps of sink pad.

    Here is my log and the command line is 
gst-launch-1.0 playbin uri=file:///home/root/temp/TestSource/10Mbps/Demo1.MPG

    Look forward to your reply.

Ming,

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