I know this is an old thread, but
Thanks for the help. What I did to fix the problem for all streaming
Change Substream settings for each camera
On my lorex app it is Remote Setting - > Network -> SubStream I selected channel 1 increased FPS to 30 adn then increased Bitrate to 512. and clicked save. did the same for channel 2 and on.
Now my crappy system is a little more less crappy.
The web apps now look like live cameras