Combine MPEG-DASH segments (ex, init.mp4 + segments.m4s) back to a full source.mp4?

Question

GPAC, http://gpac.wp.mines-telecom.fr/, can be used to do video segmentation along with MPEG-DASH spec. One type of results is a combination of init files (ex, init.mp4) and

Answer 1

Under Windows cmd shell you can use the copy command for file concatenation in the following way:

copy init.mp4 +segment*.m4s source.mp4

"help copy" does provide you all options