Error when playing MP4 on QuickTime
Hi,
I am new to QuickTime but I have installed version 7.7.4 on Windows 7. However, when I try to play a .MP4 file the program brings up an error. I took a screenshot of the error and presented it to you for a solution. See image below.
Error message:
Couldn’t open the file
“SonsofLiberty.mp4” because an unknown error occurred. The number of the error is: 8971.








