Change video playback tool using ffmpeg as a back end.

[hutch--]

This is another tool that uses ffmpeg as its back end. Its function is to change the playback speed of an MP4 video file, for faster it has x2, x4 and x8 and for slower it has 1/2 an 1/4 but note that the video you slow down must have a high enough frame rate for it to look OK. It also requires ffmpeg to be in the computer's path as this is easier in terms of development. I have found that the speedups produce better quality that anything else I have including pay for editing software.

The attached source is reasonably straight forward dialog style code and shows that code of this type is clean and simple in 64 bit MASM.