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Old 25th August 2020, 09:02   #1  |  Link
YaBoyShredderson
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Join Date: Jul 2020
Posts: 76
Splitting files to be encoded and then put back together

I want to know of a way to split video files up, so that i can encode them and then put them back together at the end.

I have done 2 quick tests, the first i split a 30 second clip out of a few movies, and then split them into 3 10 second clips and encoded them, put them back together after. But there was audio bugs, as i split, encoded, and stitched the audio as well as the video.

So i did a second, more worst case scenario test, and learning from the previous test, i only encoded the video, and then muxed the audio back in after i had assembled the full video. I took a movie and split it into 10 second chunks, there was 729 of these chunks which were all encoded seperatly in handbrake, all using the same settings. But when i put them back together the audio was way out of sync. I could see any particular point at which it desynced, but it seems to be right from the start, but theres no obvious reason as to why.

Im doing a more reasonable test now, splitting based on frame count rather than seconds, and only using 6 files, still without the audio.

Any tips? If i can do this, it would be incredibly useful. I have been encoding 1080p stuff in handbrake, and just waiting out the whole encode, leaving it over night etc, but with 4k stuff taking in excess of 20 hours in staxrip, its just not feasable for me to wait that long, so if i can split them into chunks that take a few hours, or over night each, which can be put back together agian, that would be very useful.

EDIT: im using mkvtoolnix to split and append the files.
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