[gst-devel] How do get the number of frames in a video file?

[Nick Haddad]

I want to retrieve the duration of a video file in frames, but can't  
figure out the best way to do this.

Calling...

GstFormat fmt = GST_FORMAT_DEFAULT;
gst_element_query_duration( _pipeline, &fm, &numFrames)

...doesn't work.  I'm assuming because the pipeline doesn't know about  
the "default format" (GST_FORMAT_TIME works fine).

Which element in my pipeline should I query for the number of video  
frames?  Is this even possible.  Currently I am building a pipeline  
using decodebin.

Thanks,
-Nick