Now provides to you the technical information. Which, help understand this problem. My computer works perfectly. Something important, if you want to check this conflict, it occurs with minimal subtraction, as shown in the video (Youtube:
https://youtu.be/626wWjrvUrw ). Still, this type of audio edition, are essential for certain types of work. Finally, the problem of zoom on mp4 files, it is very evident. I didn't upload a video for explain just yet, but maybe soon. Of course, Many Thanks
I leave the following technical information:
My System Information
http://pastebin.ca/2971108
The test file (mp4 video)
https://mega.co.nz/#!r9kzmDyI!b7j_9_...UL30pewizyEo3o
MediaInfo Information (about mp4 video)
http://www.pastebin.ca/2971111