VideoWriter - Error using FilesLoad

When trying to a video using VideoWriter function and I am returned the following error:

Error using FilesLoad (line 119)

Unable to find file. Ensure file exists and path is valid.

The code is simply:

writerObj = VideoWriter("Controller1:50 Controller2:20.avi");

Answer 1

[Walter Roberson]

Are you using Windows? Colon is not a valid character in a windows file name except for drive indicator

[Adam Handley]

Perfect. I can't believe I missed that.