Enhanced media plane optimization in web real time communication scenarios

An apparatus, comprising:

• at least one processor,
• at least one memory including computer program code, and
• at least one interface configured for communication with at least another apparatus,
• the at least one processor, with the at least one memory and the computer program code, being configured to cause the apparatus to perform:
• receiving a session description message comprising:
• at least one media line indicative of at least one media stream to be transported with a second media transport and encoding,
• at least one encapsulating attribute which is indicative of the alternative possibility of each of said at least one media stream to be transported with a first media transport and encoding, and
• media line number information indicative of a total number of said at least one media line in said session description message as originally generated, and
• deciding whether to utilize said first media transport and encoding for transportation of said at least one media stream corresponding to said at least one media line, wherein it is decided not to utilize said first media transport and encoding for transportation of said at least one media stream corresponding to said at least one media line if a result of counting each media line in said received session description message and said total number of said at least one media line in said session description message as originally generated, as derived from said media line number information, do not match.