Unable to seek audio files with playbin2; manual seek also broken in plugins-good-0.10.31

[Eric Montellese]

Hi folks,

I'm relatively new to gstreamer (couple of months) but have a reasonable
level of understanding.

I was initially using these versions:
gstreamer-0.10.34
gst-plugins-base-0.10.34
gst-plugins-good-0.10.29
gst-plugins-bad-0.10.22

I found that seek of audio files (aac, mp3) with playbin2 did not work.

However, with a manual pipeline, seek succeeds.  The problem appears to be
that playbin2 does not automatically plug in the parsers (aacparse,
mpegaudioparse).  If my manual pipeline contains these elements, seek
succeeds; without them, seek fails.

Looking on the GStreamer website http://gstreamer.freedesktop.org/news/, I
saw the note in the latest 0.10 release that said:

> decodebin/playbin2 now plug parsers by default

So I decided to upgrade to the 2012-02-21 release.

However, I found that playbin2 still does not autoplug the audio parsers in
this release.  Bummer.  So, first question:

"Is there any way to encourage playbin2 to autoplug the audio parsers?"
and
"Is this a known issue, and is there a known workaround?"

Either way: now that I've done the work to upgrade, I'd like to keep the
updated components -- however, I am now seeing a bug with aacparse
regarding newsegments:

# gst-launch  filesrc location=/media/Honesty.aac ! id3demux ! aacparse !
custom_audio_decoder_and_sink
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
0:00:00.282161885  2561  0x812f188 WARN                tagdemux
gsttagdemux.c:680:gst_tag_demux_chain:<id3demux0> Downstream did not handle
newsegment event as it should
0:00:00.282425516  2561  0x812f188 WARN                 basesrc
gstbasesrc.c:2625:gst_base_src_loop:<filesrc0> error: Internal data flow
error.
0:00:00.282490123  2561  0x812f188 WARN                 basesrc
gstbasesrc.c:2625:gst_base_src_loop:<filesrc0> error: streaming task
paused, reason not-linked (-1)
ERROR: from element /GstPipeline:pipeline0/GstFileSrc:filesrc0: Internal
data flow error.
Additional debug info:
gstbasesrc.c(2625): gst_base_src_loop ():
/GstPipeline:pipeline0/GstFileSrc:filesrc0:
streaming task paused, reason not-linked (-1)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

This exact command worked correctly (and this pipeline would seek) with the
previous version (version numbers listed at the top)

Also to note: this command does still work fine:
# gst-launch  filesrc location=/media/Honesty.aac ! id3demux !
custom_audio_decoder_and_sink
except that seek does not work without the parser element.

So, second question:
"Are there any known issues with aacparse regarding newsegment handling"


Thank You,
Eric
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/gstreamer-devel/attachments/20120619/abb4a6ab/attachment.html>