H264 Stream with Main Profile laggy ? - looks like 20 fps

Hi,
we'Re encoding an h264 Stream with 1.4 Mbit and Main Profile @5.1 or different.
When we use the Main Profile the user can watch the stream and it looks like it has 15-20 fps - it looks laggy and you can the the slow movings
If you switch to Base Line Profile it looks as it should.
It not depends on the CPU on Client or Server side - encoders says 25 fps.
We're using Blackmagic Decklink cards.
Did anyone has the same Problem ?

Matthew Quinn
Systems Coordinator
Digital Media Department
t: 0151 293 8720 | m: 07887 735 405
f: 0151 293 8722 | w: http://www.liverpoolfc.tv/
a: Unit 14, The Matchworks, Speke Rd, Liverpool, L19 2RF
Please consider the environment before printing this email

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