First when NTSC is selected, MEP auto selects the WRONG format. It selects bottom field first, but NTSC is almost always top field first. They need to understand the difference between PAL and NTSC. The unwary user will end up with a very jittery video.
The Error 5 DBK when burning is a HUGE problem which has not been solved. From my experience it happens when you are trying to squeeze a large video onto a standar SL dvd. When the length of the video is extended to DL size, the problem usually does not happen. It seems to be worse in 2015 than in 2014.
So far the only workaround that I have come up with is the following:
Compress the video to the size you want using another program such as TMPGEnc. Then use MEP to setup the menus and burn -UGH. You can use MEP to initially edit everything, but then you can produce an MP4 video for input to TMPGenc or bettery yet make a Lagarith lossless avi or a HUFFYUV avi. The trick to coercing MEP to burn without an error is to set the max bitrate and smart copy. The actual output will sized according to the input, not the settings. If you select a smaller size you will probably get the error.
MEP 2015 also has some video/audo sync problems with 3D Fuji format AVI input files, but MEP 2014 seems to work OK. I created the project using 2015, but had to burn it using 2014 to get proper sync.
Is there any hope of fixing the random burn error problem which has been around for many years?????