What are your specifications and what is the footage from? Just because your PC meets specs doesn't mean it will run perfectly when editing all footage.
thank you first for your help
my graphic card is : AMD M880G with ATI mobility Radeon HD 4250
Processor : AMD Phenom (TM) II P820 triple core processor
I have this problem with all kind of videos but they mostly come from a gopro hd filmed in 720p 60fps MP4
but I even have this problem with like canon photo camera's video wich are really low quallity
I cheked on internet forum and people having the same computer and the same like graphic card and processor can use adobe pr just fine.
My uncle even have the same computer and doesnt have this problem
Seems like a codec problem
I have coreavc 2.5.5 h.264. it helps but not enough
maybe it is not set right,
Hope you can help me,
First rule for editors: NEVER install third party codecs, unless you are ABSOLUTELY sure that it will not cause problems and you have several reliable reports to substantiate that it is safe to use.
Not saying that is the case here, but your system is so weak in terms of CPU and video card, and you forgot to mention the memory and hard disk setup, but assumedly it has the same weaknesses, that this source material just makes your system dead slow.
Solution: Either get a new system or restrict yourself to editing DV material, not highly compressed material.
The codec coreavc 2.5.5 h.264 is really recommended by Gopro hd cam website. ( http://http://gopro.com/support/troubleshooting-tips-hd/ in the section my computer will not playback MP4 videos.)
Here's my pc info:
4 Go RAM (3.74 Go free)
264Go empty space of memory
I'm sorry for the hard disc setup, I don't really know what it is ( english is not my first language )
maybe it's: SYSTEM: 199 Mo NTFS, And C: 451.94 Go NTFS
I have the same problem with quicktime ( updated yesterday) and other software like Corel studio, power director... (Those programs used to work just fine like on year ago)
only windows media is able to play those hd videos well
I really feel like the problem is not my pc parts or memory.
Maybe theres a broken file or a wrong setting, or a update that I need for a program but I have done the updates as they are requested recently
my uncle have the exact same pc and adobe premiere and all those hd videos players works well
I wish I could use Adobe premiere pro during the trial, to see how it works before buying it
You really look like you know a lot about computers and adobe premiere pro
Thanks a lot for your help
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H.264 is a very compressed format which is really hard on a machine. I have an acer laptop at home with an firstname.lastname@example.org ghz, 4g ddr3 ram, 7200rpm HDD, and ati 5650 and editing H.264 off of my 60d can be a painfully slow process, though I can power through most other things just fine. Your setup is extremely week and might not be able to handle editing h.264, even at 720p. Try converting your footage to mpeg2 or an avi and see how it plays back. If it works, then the .mp4's are just too much for your machine.
Another option is to start with a clean disk... backup all of your files on an external hard drive, reinstall windows and the software you need, and see if that helps. You might have corrupt program files, or like you said a setting changed, but the quickest and easiest way to fix that is to start over. It may take a few hours but that's less time than the days you will spend trying to find an answer. You may also try the "system restore" and see if there is a date before the time you noticed the slow down.
In the future it's a better idea to go with a desktop, you get a much better price to performance ratio.