Is there any alternative decoder which can be used instead of "mad".
What are names of other decoders ??
How can i use those in program??

I used a line in my code as:

decoder=gst_element_factory_make("mad","decoder");
if(decoder==NULL)
{
g_print(" Decoder not found\n"); //This message i always see
exit(EXIT_FAILURE);
}
What are the possible reasons???
What are the requirement to get a decoder of type "mad"?