[gst-devel] gst_caps_get_structure question

[LearnerMan]

Hi,

The gst_buffer_get_caps function returns a GstCaps varialbe.  I read in the
documentation that GstCaps are represented as an array of one or more
GstStructures, and each GstStructure is an array of fields where each field
consists of a field name string (e.g. "width") and a typed value.

I understand this so far and I can use the following to get width and height
info etc:
GstStructure *str = gst_caps_get_structure( caps, 0 );

My question is: in the above function the index used is '0'.  What
determines what index is used here?

In my program if I print out the str returned I get the following output:
video/x-raw-yuv, width=(int)640, height=(int)480,
framerate=(fraction)1000/1, format=(fourcc)I420, interlaced=(boolean)false,
pixel-aspect-ratio=(fraction)1/1;().

How do I find out other information about such as bit-rate etc??

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