I recently posted in nero/incd about some troublesome mp4 files that I couldn't burn with nero vision 4. I seem to have come up with a solution of sorts in the form of Recode where I recoded them and burned them to disc.
I'm still relatively new to this but I'm pretty sure that the disc can only be viewed on another computer. Not a problem as the ends will justify the means here because the mp4s in question were Silver Surfer cartoons for my 5 year old son whos bang into Marvel but has never heard of The Silver Surfer.
On a more Cd Freaky note I emailed Nero about the initial problem and they asked for the log file which I forwarded. I'm waiting on an answer now as I still don't understand why Nero Vision says it supports mp4 but wouldn't touch the ones in question.