Input file not supported

Dont expect this app will convert all file types it says it does. . . I tried to create an m4v with iMovie 9.0.6, using pictures and transitions . . . The resulting .m4v "was a file type that is not supported. . . . Apparently, this app needs a clearer explanation of what is acceptable input. . .

The only description I could find, said it supported .m4v, .mov, and a couple of other file types, but although some .m4vs might work, mine did not. . .

Buyer beware, It seems I threw my money away because I expected it supported all .m4vs. . .

Other reviewers said it would not support .mov, but I suspect it may be any input type depending on how it was created. . .

Richard Tobin about Video To GIF Converter