[gst-devel] Media type probing

Sergey Yakimenko starshiy at apriorit.com
Fri Dec 26 12:41:59 CET 2008


Thanks for your reply. You're right - it seems that decodebin does exactly
what I need. I wonder why this didn't occur to me before. Thank you.

Best regards,
Sergey Yakimenko               starshiy at apriorit.com
software developer of ApriorIT - A PriorITy Choice!

-----Original Message-----
From: Michael Smith
Sent: Wednesday, December 24, 2008 8:41:10 PM
To: Sergey Yakimenko
Subject: [gst-devel] Media type probing

MS> On Wed, Dec 24, 2008 at 3:49 AM, Sergey Yakimenko <starshiy at apriorit.com> wrote:
>> Hello all,
>> I wonder if there is a way to determine whether there are gstreamer elements
>> in a certain gstreamer configuration on a certain system that support certain
>> media type? In other words, if there is a mechanism, or a way to implement
>> such a mechanism similar to DirectShow's IGraphBuilder::Render() or
>> IFilterGraph2::RenderEx() functions? I now that there is a way of recognizing
>> media type - decodebin, etc.; but I need to do the opposite operation: I have
>> a media stream with fully specified mediatype, and I'd like to know whether I
>> can play the stream, but to know this before I start playing, i.e. without
>> playing the stream.

MS> Yes, this is basically what decodebin does internally - it uses a
MS> typefind element to find out what type of media it is, then iterates
MS> over the element factories to find a compatible decoder/demuxer.

MS> You can look at the code for that to figure out the details of how to do it.

MS> Mike

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