问题
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 several roughly fixed-duration segments (ex, segment-%d.m4s). What if I just got those results and I like to reverse/combine them back to one full source.mp4 file? Can I use GPAC or ffmpeg for this?
回答1:
You can just use the cat command or similar tools to do this job:
cat init.mp4 > source.mp4
cat segment-1.m4s >> source.mp4
cat segment-2.m4s >> source.mp4
...
To do this automatically for all segments in the current folder, the following command can be used:
cat init.mp4 $(ls -vx segment-*.m4s) > source.mp4
The -v parameter for ls sorts the output naturally (i.e. 1, 2, ..., 10, ..., 100), otherwise it sorts lexically (i.e. 1, 10, 100, 2, ...).
The -x parameter puts the output on a line instead of columns.
回答2:
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
来源：https://stackoverflow.com/questions/23485759/combine-mpeg-dash-segments-ex-init-mp4-segments-m4s-back-to-a-full-source-m