I defer to this post in the forum
http://www.magix.info/us/soundtrack-slower-than-video-mep17plus.forum.774432.html
Unfortunately I did not see an answer posted and wasn't sure if I should reply to that thread... or start anew. Alas, I start anew. (Though I was curious if Tequila under a full moon perhaps WAS the answer?)
I too am having the exact same problem with videos being imported from my Samsung smart phone.
They play fine in Windows Movie Player and a few other video players . But they don't play nice with MEP 2013 MX Plus. I have an HP dv6TQE Quad Edition computer with all the bells and whistles- high graphics card, 1TB memory, tons of Ram. Don't believe that's the problem.
In many cases, upon importing to MEP (and not adjusting to the file import size), one or more of the following happens-
the audio is mismatched to the video and/or
the audio continues to play while the video stops about 20% of the way in...
If I can trust the information given here
http://www.ehow.com/how_8529169_install-mpeg4-sedg-codec-computer.html
then, I believe it needs the Samsung Codec mentioned.
But when I look through Magix Help Contents , it states I have to pay to get Magix to shake hands with purchased codecs? Is that true?
Do I have to have Magix do something on their end to 'activate' the codec...or will MEP magically locate the codec when opening the file?
Thanks in advance,
Paula
p.s. I can place one of the videos into a Dropbox file, if that would help you to download one of the MP4s yourself. Maybe you'll have better luck?