There are so many movies coming round in junk emails these days that you may be happy you can’t play WMV or AVI files on your mac. But just in case you do need to actually look at one, here’s how.
I was recently given a keynote presentation which contained a movie. When I played the presentation the sound worked but the movie was blank. It turned out the movie was not in a format that Quicktime could play. There are many such formats. When I tried to play the movie in Quicktime I got an error saying ‘The document could not be opened. The movie is not in a format that QuickTime Player understands.You may need to install additional software to open this type of file.’
Here’s what to do.