Loading mpeg's in Quicktime

I need some help loading a movie in quicktime. When I try to open the file, I get the following error: "The movie could not be opened. The file is not a movie file."

Following others' advice on a similar thread in this forum, I downloaded the Perian plug-in for Quicktime, and bought the upgrade to Quicktime Pro and the additional QuicktimeMPEG2 upgrade (though I think my file is just an mpeg). But I'm still getting the same error message.

I have been able to play the video with VLC, so I don't think the file is the problem. The reason I'm not just using VLC is that I need to be able to go forward and backward frame-by-frame because I'm using still images for a publication.

Also, if there's an alternative program to Quicktime and VLC that allows moving forward and backwards frame by frame and taking snapshots, that would also solve the problem.

Any advice would be appreciated.

 

added above.

 

Thanks for your reply. I am able to open the file with Movist, and as you wrote I'm able to move frame by frame and copy images for my project. So I think my problem is solved by using Movist - thanks.

For interest's sake, the Codec is MPEG2, and the format is MPEG2 Muxed Track, 640 x 480. Does that help you understand why I can't open the file with Quicktime?

Thanks for the tip on using the edit button. Is there a way to delete posts also?