[gst-devel] pad_probe question

[Edward Averill]

Thanks for all that info, that is VERY helpful!!!  I think I'm starting to understand the whole type-find thing now.. I'm making steady progress.Have a great week!..ed..> Date: Sun, 10 Jun 2007 10:36:29 +0200> From: bilboed at gmail.com> To: edaverill at hotmail.com> Subject: Re: [gst-devel] pad_probe question> CC: gstreamer-devel at lists.sourceforge.net> > Hi,> >   you might want to run gst-typefind-0.10 on that file to see what> kind of MIME type typefind thinks it is. decodebin will try to find a> demuxer,parser or decoder that can handle that MIME type and so forth.>   You might also want to make sure, using "GST_DEBUG=decodebin:5> gst-launch...", that decodebin is really using the elements you're> expecting it to use.> > On 6/8/07, Edward Averill <edaverill at hotmail.com> wrote:> >> >  Ok, I'm terminally frustrated.> >> > I have an element that's trying to play nice with decodebin (yes, I posted a> > similar question before, but I have more details now).  The element is a> > demuxer.. typefind works, the element loads, I parse the input file and then> > generate a NEWSEGMENT event to push out.  Immediately on sending the> > NEWSEGMENT I see:> >> > decodebin gstdecodebin.c:664:pad_probe:<d> [00m Pad probe on pad> > <mydecoder0:src> but pad <mydecoder0:src> still needs data.> >   That is normal.> > >> > The command line is:> >> > gst-launch filesrc location=/mytestfiles/test001.vid !> > decodebin name=d d. ! myoverlaysink> >> > The pipeline proceeds to play, I don't see any error messages or warnings> > anywhere, yet the playback is garbled.> >   If the playback is garbled, it means data is reaching your sink but> didn't go through the elements you expected.> > >> > Not using decodebin and specifying the pipeline explicitly, thus, works> > without garbled playback:> >> > gst-launch filesrc location=/mytestfiles/test001.vid !> > mydemux name=q q. ! queue ! mydecoder ! myoverlaysink q. ! myaudiosink> >> > Does this possibly have something to do with the MIME type I'm returning> > from my demuxers typefind function?> >   Yes, see the top of this mail.> > >  I notice that qtdemux does NOT have a> > typefind, so past this point it's kind of useless as a template.> >   If you want to see examples of typefinding, you can have a look at> gst-plugins-base/gst/typefind/gsttypefindfunctions.c or> gst-plugins-base/gst/subparse/gstsubparse.c .>   Typefind functions are not part of elements, they're provided by> plugins. The reason why there isn't one in qtdemux is because most> typefind functions are contained in gsttypefindfunctions.c> > >> > All assistance appreciated before I tear out what's left of my hair.> >   Gstreamer shall not be held responsible for any kind of hair loss :)> >     Edward> > >> > ..ed..> >> >> > -------------------------------------------------------------------------> > This SF.net email is sponsored by DB2 Express> > Download DB2 Express C - the FREE version of DB2 express and take> > control of your XML. No limits. Just data. Click to get it now.> > http://sourceforge.net/powerbar/db2/> > _______________________________________________> > gstreamer-devel mailing list> > gstreamer-devel at lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel> >> >> > > -- > Edward Hervey> Multimedia editing developer / Fluendo S.A.> http://www.pitivi.org/
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