I don't know why so many people are having problems with this format.
FFDShow (only install the codecs you know you need)
http://fileforum.betanews.com/detail/FFDShow_MPEG4_Video_Decoder/1054056131/
Quicktime Alternative
http://fileforum.betanews.com/detail/QuickTime_Alternative_QT7/1049831315/
Install those and try it in your video player. If you insist on using Quicktime, update it to the latest version.
Most of all keep your computer clean, keep track of codecs you install and uninstall old ones.
Do not complain to the uploader that you cannot play a file. Do not ask the uploader for a file to be re-encoded. Do not ask the uploader for something that is sold or has been sold recently. There is plenty of information on one of these pages to fix the problem.
Also see:
http://www.digital-digest.com/articles/MP4_Usage_Guide_page1.html
http://www.mousebits.com/forum.php?action=viewtopic&topicid=452
FFDShow (only install the codecs you know you need)
http://fileforum.betanews.com/detail/FFDShow_MPEG4_Video_Decoder/1054056131/
Quicktime Alternative
http://fileforum.betanews.com/detail/QuickTime_Alternative_QT7/1049831315/
Install those and try it in your video player. If you insist on using Quicktime, update it to the latest version.
Most of all keep your computer clean, keep track of codecs you install and uninstall old ones.
Do not complain to the uploader that you cannot play a file. Do not ask the uploader for a file to be re-encoded. Do not ask the uploader for something that is sold or has been sold recently. There is plenty of information on one of these pages to fix the problem.
Also see:
http://www.digital-digest.com/articles/MP4_Usage_Guide_page1.html
http://www.mousebits.com/forum.php?action=viewtopic&topicid=452