[Bug 698256] New: Using avdec_mp3 decoder appliction can't retrieve the audio codec info.

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=698256
  GStreamer | gst-plugins-good | 1.0.5

           Summary: Using avdec_mp3 decoder appliction can't retrieve the
                    audio codec info.
    Classification: Platform
           Product: GStreamer
           Version: 1.0.5
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: hjqiao213 at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Using gst-launch-1.0 playbin uri=file:///*.mp3 -t and avdec_mp3 decoder,
application can't retrieve codec info. The reason is mpegaudioparse plugin only
send TAG_EVENT once to downstream, avdec_mp3 recieved and then send to
decodebin. But by now expose_pad function in decodebin hasn't been invoked. So
this tag event dropped.  Using mad decoder, the problem cann't reproduced. The
reason is GstAudioDecoder will sent the TAG_EVENT again. Please confirmed.

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