Convert 264 to MPG

264 videos are actually video tracks part of MPEG-4 files, so in this sense what 264 to mpg conversion is pretty much the same as mp4 to mpg conversion and this should be doable with every modern video editor or video converter that supports both MPG and MPEG-4 formats.  It's a downgrade used to produce video recordings for older devices that do not support MPEG-4.