The attached patch fixes two problems with flacdec: 
 
* seeking in flacs doesn't work 
 
* some sinks (e.g. artsdsink, nassink) report wrong values on doing 
gst_element_query(), e.g. artsdsink reports '11 seconds' where it should 
report a time position of '1 seconds'. Setting the duration on the buffer 
seems to fix that. 
 
 
I also think the whole block where gst_pad_set_explicit_caps() is called is 
called (line 493-506) should be moved to the beginning of the function, but as 
it doesn't seem to be necessary to make things work I've left it as it is. 
 
Cheers 
 -Tim