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Old 8th March 2020, 15:56   #629  |  Link
giantslirpy711
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Segmenting by timecode puts audio out sync

EDIT: MOSU, could you possibly help me figure this out.
I've hunted for an answer everywhere. The issue is not isolated to one file or type of files within mkv. I'm not saying it's a bug. I honestly have no idea what it is or how to fix it, but I have tried.

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I was attempting to see just how effective split by frame and timecodes was in doing any simple video editing thinking, sure why edit the video, to remove commerciqls or unwanted office content etc, just segment the MKV pull out the chunks you don't want.

Segmenting by filesize works great for years. Segment by frame seems to work fine as well but to be honest, editing by timecodes is giving me problems.

Here was my practice file. I attempted to make a cliff notes version of episode one. 50 min content edited down to 10min.

X:/Downloads/APPS/mkvtoolnix_all/mkvtoolnix-64-bit-41.0.0/mkvtoolnix\mkvmerge.exe --ui-language en --output ^"C:\MOVIES\REMUX2\Magicians.S04E01.mkv^" --language 0:jpn --default-track 0:yes --display-dimensions 0:1920x1080 --compression 0:none --language 1:eng --default-track 1:yes --compression 1:none --sub-charset 2:UTF-8 --language 2:eng --track-name 2:SDH --compression 2:none ^"^(^" ^"E:\MOVIES\Season.04\Magicians.S04E01.mkv^" ^"^)^" --clusters-in-meta-seek --generate-chapters interval:00:05:00 --track-order 0:0,0:1,0:2 --split ^"parts:00:00:00-00:01:35,+00:02:03-00:02:10,+00:02:24-00:02:30,+00:02:45-00:02:59,+00:03:20-00:03:46,+00:04:50-00:05:00,+00:06:23-00:06:32,+00:07:51-00:08:09,+00:10:30-00:11:58,+00:17:17-00:18:28,+00:19:40-00:20:11,+00:26:43-00:27:06,+00:28:07-00:28:37,+00:37:45-00:38:20,+00:39:35-00:40:07,+00:42:10-00:44:28^"

Ran fine no errors but file was a mess.

—The audio was out of sync within first 30 seconds and was 2 min out of sync by end of 10 minute mkv.
—there were strange spots where the picture would stutter at the transition Point rather than a clean slice.. It appeared to be showing a portion of the end of previous segment and the beginning of next segment at same time.

—I bumped timecodes to 10000000
—I changed the cluster size to 100 thinking maybe smaller clusters could be sliced up easier.

The final product was still SEVERELY out of sync audio with video.

Any comments on why this happens and what to do to avoid it would be appreciated.

I've chopped up videos into 250MB chunks for x264 x265 test runs, ALL SEGMENTS perform perfectly.

No idea why do timecodes segments fall apart
Any suggestions?
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Last edited by giantslirpy711; 9th March 2020 at 19:07.
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