I don't think so, Ken. As I recall, MP4 is still pretty proprietary and, while it will play some audio and video formats, Irfanview's editing/cropping/resizing abilities are pretty much confined to the static graphic formats.Does it handle MP4 files? My new video camera creates them and the only software I have to handle it is their crappy bundled software.
The problem I am having is finding video editing software that will open an MP4 file. The camcorder does not save in any other format, nor does the stinky proprietary bundled software.MP4 is just Mpeg 4 which is an open standard, however there may be some proprietary compression algorithms that you can use in mp4 that are not, so be careful.