Premier Pro is slowing the audio of a clip over time why?

Question

There is nothing wrong with the clip I look at it online before i download it and even when I download it the sound syncs up perfectly with the video, however when i bring the clip into premier pro and play it the sound starts off once again perfectly in sync, however by the end of the clip the sound it completely out of sync with the picture. when i go to export the video as a sequence it does the same thing where the clip starts out fine,  but over time becomes out of sync. what is Premier doing and why?

Answer 1

What, EXACTLY, is inside the video file?
Read Bill Hunt on a file type as WRAPPER http://forums.adobe.com/thread/440037
What is a CODEC... a Primer http://forums.adobe.com/thread/546811
What CODEC is INSIDE that file? http://forums.adobe.com/thread/440037
Report back with the codec details of your file, use the programs below... A screen shot works well to SHOW people what you are doing
http://forums.adobe.com/thread/592070?tstart=30
For PC http://mediainfo.sourceforge.net/en or http://www.headbands.com/gspot/
For Mac http://mediainspector.massanti.com/
While your specific file may not be from an iphone, this MAY give you an idea
Iphone won't edit easily because it uses a variable frame rate
- A fix in message #22 http://forums.adobe.com/thread/934466