Not a question, but hopefully a solution for some of you.
Like many other people, I have experienced problems with burning Blu-ray disks failing after only a few seconds, with the following message in the log file:
PrepareDVDVideoFiles() failed with ErrNo 5 - encoding failed
I am using Video Pro X6, although I have seen the problem reported with other Magix products. In my case the issue started after I upgraded to version 13.0.4.2 (UDP1) of Pro X. After many weeks of experimentation, I have found the solution. It may not cure everyone else's problem, because I suspect the error code is a generic one covering a multitude of problems, but here it is in case it helps.
In the Burn dialog box, click on Encoder Settings, and on the next screen on Advanced. I found that the Average Bit Rate and the Maximum Bit rate were set to values of 26000 and 40000 respectively. Change these to lower settings. I am using Average 20000, Max 24000, although it still works if you set Average 30000 and Max 30000. Setting Max to more than 30000 definitely makes the encoding crash.
That's all there was to it. The standard Blue-ray 1920x1080i PAL preset in the Advanced settings is the culprit that sets these high values. I saved my settings under a new name so I could restore them easily.
Hope this helps.