Two macs. I can see a video file in the first one but not in the second one

[tirengarfio]

Hi to all!

I have two macs and I have a video file, that i can watch in one but not in the other one.

How can i know what i need to watch the file in the second one?

[Case]

Some additional info may be required: -
- What kind of video file (codecs)?
- What do you use to try and watch this file?
- What kind of Macs with what OS and software (versions)?

[tirengarfio]

I have a look at the properties of the film (in the computer i can open it right of course) in QT, and it says DivX 5.0

Then i go to System Preferences/DivX, and Im not registered neither i can download updates (cos it says there isnt anyone) in both computers.

Computer where i can open the file: 10.3.9
Computer where i cant open the file: 10.4.7

[Case]

No obvious reason there yet. What is the exact error message that you get on the Mac that won't play it?

[rumplestiltskin]

Check inside Macintosh HD > Library > QuickTime on the Mac that does play the movie. Copy the codecs (that aren't on the other Mac) to the Mac that doesn't play. Restart.