Eloi Bail authored Sep 04, 2015 and Guillaume Roguez committed Sep 04, 2015

RTP packet maximum size must rely on maximum MTU size.
Networks such as ADSL include PPPoE header that reduce maximum
payload size.
Notice that packets higher than MTU would lead to fragmentation
by routers. With high bitrates in video, we want to avoid that.

This patch proposes to reduce the maximum UDP payload size allowed
to RTP to a value safe for PPPoE MTU.

This value has been computed as follow:

Ethernet MTU          = 1500 bytes
PPPoE headers        -= 8
IP headers           -= 24
UDP headers          -= 8
----------------------------------
Total for RTP payload = 1460 bytes

Issue: #80080
Change-Id: Ibc8d5943017f3cea3ac6e1f17f90a85f06755ebe