Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.


Go Back   Doom9's Forum > Capturing and Editing Video > New and alternative a/v containers

Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 4th April 2024, 20:40   #20  |  Link
Matroska find' ich toll
Join Date: Apr 2008
Posts: 1,387
Originally Posted by WontonNoodle View Post
ok so chaptereditor and mkvtoolnix results in mismatching frames for the video compared to the disc
Do you had demuxed the tracks inside cE? I have never issues with the video frames.

Originally Posted by WontonNoodle View Post
dgdemux and eac3to result in the same frames as the disc
however dgdemux dts track progressively gets more and more out of sync (starts with 0 difference, then 11 ms delay, then up to 54 ms delay vs the eac3to track as the movie goes on)

so either the dgdemux or eac3to track is correct? any ideas as to which one is the right one.
i also tried on a non branching disc and mkvtoolnix, dgdemux, and eac3to all result in the same audio sync.
Both tracks, eac3to.dts and dgdemux.dts are fine, but not perfect, and this is also never possible.

The whole issue comes from the different durations of the frames. A video frame has a duration of 24000/1001 ms (round about 41,708 ms). A .DTS frame has a duration of 32ms (hope I'm right)

Let's say our movie has only one video frame:
When we use only one Audio frame there are now more than 9 ms playtime of the video without sound.
For Blu-ray and maybe all other disc formats:
The Audios are always longer than the video.

So we have to use 2 Audio frames for our One-Video-Frame-Movie.
Now is the Audio duration 64ms and plays 22ms longer then the video.

But when the movie uses multiple m2ts files, for each m2ts there is now a bit more Audio as Video.
eac3to and DGDemux drops Audio frames when the desynch reach a certain limit.

There are also more discussion on Reddit.
I have written a lot email with this user and he work on a method where no demuxing is necessary.
He means removing Audio data is not good, and he inspired me to look deeper in the BD-specs.
And he is absolute right.
But to keep the entire data and playback then correctly is currently not possible, but maybe in a near future.
I am excited if he can make it to run.
When you preserve all the m2ts files in separate mkv files and use Linked-Ordered-Chapters, this could work.
hubblec4 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +1. The time now is 15:02.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.