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19th April 2005, 17:17 | #1 | Link |
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HowTo split/concatenate MP4 files with MP4Box
some might have already noticed it: MP4Box now supports splitting and concatenating of MP4 files too
splitting splitting can be done timewise, sizewise (eg split every 700MB). parts of a MP4 can be extracted timewise (eg from sec 10 - 60)... of course splitting video will be done at keyframes automatically. to avoid too much hassles with keyframes the splitting option will only work on mp4 files which have only 1 video stream! the flags for splitting are: - split seconds - splits size (in kb) - splitx Starttime:Endtime (in seconds) eg if you want to split a 1400mb MP4 file into two parts a 700mb you can use the following cmdl: Code:
MP4Box -splits 716800 input.mp4 concatenating (or appending) can be done on all files which are similar (eg same resolution, some audio/video format...), framerate shouldnt matter (as MP4 supports variable framerate) the flag for concatenating is: - cat it works in a similar way as "-add", which means you can even -cat two .avi or .mpg files into one MP4 file in one commandline eg for concatenating two files you can use: Code:
MP4Box -cat file1.mp4 -cat file2.mp4 output.mp4 i did lots of tests with these functions, so it seems to be pretty stable already, but of course there can still be glitches as its a pretty new feature get a binary supporting it here (compiled by celtic_druid)
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