[RESOLVED] MKV demux support

Support forum for DGDecNV
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Re: Feature Requests

Post by Guest »

Not really, I create trimmed m2ts files with DGIndexNV from the main movie mpls
Give me a few minutes and I'll remux a mpls to mkv and check the chapters
Forgot about checking those, sorry about that
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Re: Feature Requests

Post by Guest »

Does DGIndexNV-test demux the chapters from MKV?
Tried and it didn't give an option for it
Note
All this made me think of a feature request for your consideration after you finish the MKV stuff
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Re: Feature Requests

Post by admin »

No chapter support. I was trying to decide if it is worth it.

Please make your suggestion in the features thread as I have just split the threads. Thanks.
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Re: Feature Requests

Post by Guest 2 »

admin wrote:
Sat Mar 03, 2018 5:43 pm
OK, back from swimming.
At 45 to get Divemaster license I have to learn how to swim again and better. Hard but necessary as it will be part of exams.
admin wrote:
Sat Mar 03, 2018 5:43 pm
There should be no delay on MKV demuxed stuff, so I don't do anything with that.
By design? Usually demuxing leaves audio tracks as they are. AFAIK the only way to correct it is to put it back when muxing again, reencoding or trimming in some way.
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Re: Feature Requests

Post by Guest 2 »

admin wrote:
Sun Mar 04, 2018 6:00 pm
No chapter support. I was trying to decide if it is worth it.
IMHO yes, as we are looking for a GMkv (or similar) alternative.
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Re: Feature Requests

Post by admin »

Guest 2 wrote:
Tue Mar 06, 2018 6:15 am
admin wrote:
Sat Mar 03, 2018 5:43 pm
There should be no delay on MKV demuxed stuff, so I don't do anything with that.
By design? Usually demuxing leaves audio tracks as they are. AFAIK the only way to correct it is to put it back when muxing again, reencoding or trimming in some way.
I suppose you posted that before reading all the posts. I include the delay in the demuxed filename.
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Re: Feature Requests

Post by admin »

Guest 2 wrote:
Tue Mar 06, 2018 6:16 am
admin wrote:
Sun Mar 04, 2018 6:00 pm
No chapter support. I was trying to decide if it is worth it.
IMHO yes, as we are looking for a GMkv (or similar) alternative.
Can you please describe a task and its workflow that uses demuxed chapter information? I need to understand the context.

And how would you expect chapter demuxing to interact with the configured project range, if at all. If there is no interaction then the simplest thing to do may be to automatically launch mkvextract for the chapters.

Are you looking for simple or XML format for the demuxed chapter files?
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Re: MKV demux support

Post by admin »

I have uploaded a new version with MKV chapters demux support. It requires a copy of mkvextract.exe to be in the same directory as DGIndexNV.exe and currently does only XML.

http://rationalqm.us/misc/DGIndexNV_test.exe

@Guest 2

Since you're the guy that asked for this, I'll appreciate your feedback on whether it is doing what you need.
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Re: Feature Requests

Post by Guest 2 »

admin wrote:
Tue Mar 06, 2018 6:21 am
I suppose you posted that before reading all the posts. I include the delay in the demuxed filename.
Ok. I understood you corrected delay while demuxing. :oops:
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Re: MKV demux support

Post by admin »

I was imprecise in my language. :?

What do you think of the chapters support?
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Re: Feature Requests

Post by Guest 2 »

admin wrote:
Tue Mar 06, 2018 6:23 am
Can you please describe a task and its workflow that uses demuxed chapter information? I need to understand the context.
Demux a BD, compress with x264, compress audio to ac3 or aac, remux with chapters, watch on a laptop while traveling by train or plane :D
admin wrote:
Tue Mar 06, 2018 6:23 am
Are you looking for simple or XML format for the demuxed chapter files?
Whatever format you are more confortable to extract. MKVToolnix can digest any.
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Re: MKV demux support

Post by Guest 2 »

admin wrote:
Tue Mar 06, 2018 9:35 am
Since you're the guy that asked for this, I'll appreciate your feedback on whether it is doing what you need.
Gonca too. We are partners in crime :D

Will test asap.
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Re: MKV demux support

Post by admin »

Thanks, Guest 2. I suppose I should call you two guys the usual suspects now, huh?

The main thing is that it does not honor the project range for chapters. But it's not clear that such a thing would be needed, and in any case, I could post-fix-up the demuxed file based on the StartTime of the project range (I hope it's not needed!) The scenario you gave would not require it.

Here's another thought. I would like to emulate gMKVExtractGUI's checkbox design but Win32 does not have a listbox with checkable items. I'll see if I can subclass it and make one that does. That is the reason for the somewhat clunky selection method I have now.
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SRT delay

Post by Guest 2 »

@admin :hat:

I was playing a bit with Justice League and Detroit BDs.

I noticed that the srt filenaming gives strange delay results, such as: DELAY_150751ms or DELAY_166668ms.

I have compared with the srt extracted by GMKV and they are identical in time codes and contents.
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Re: MKV demux support

Post by Guest »

The delay is the start time code of the first subtitle
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Re: MKV demux support

Post by Guest »

I suppose I should call you two guys the usual suspects now, huh?
Usual?
Not odd, rare, strange, etc?
Just usual/average :facepalm: ;)
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Re: MKV demux support

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gonca wrote:
Tue Mar 06, 2018 3:40 pm
The delay is the start time code of the first subtitle
Ah, so that is the significance of it. Do we really need the delay value in the filename then? Seems not to me.
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Re: MKV demux support

Post by Guest »

Realistically, no
Because it is a subtitle the delay in the name it is ignored by mkvmerge
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Re: MKV demux support

Post by Guest 2 »

gonca wrote:
Tue Mar 06, 2018 3:40 pm
The delay is the start time code of the first subtitle
I can't understand why.

Delay should be the one you put in MKVToolnix when you don't want to edit srt with same fps but from different source (and it happens, when you need to translate from foreign language and the foreign BD edition has more intro or less than yours).
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Re: MKV demux support

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gonca wrote:
Tue Mar 06, 2018 3:45 pm
Because it is a subtitle the delay in the name it is ignored by mkvmerge
AFAIK it's not true. MKVToolnix honors delay for every stream.
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Re: MKV demux support

Post by Guest »

In the PGS subtitle I tested that is how it works out
You can always manually enter a delay into mkvmerge
I merged the subtitles with the delays in the name, extracted them and they showed no difference
Note that I only use PGS subtitles
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Re: MKV demux support

Post by admin »

I'm going to remove it from subtitle filenames. It doesn't have the same significance as for audio because audio is expected to start right away with the video while the first sub may not come for a while, so the offset between the start of the video and the first subtitle block has no significance.
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Re: MKV demux support

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New version:

http://rationalqm.us/misc/DGIndexNV_test.exe

Removes DELAY from subtitles and fixes Guest 2's crash. Marked as slipstream 130 in preparation for release.
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Re: MKV demux support

Post by Guest 2 »

gonca wrote:
Tue Mar 06, 2018 3:49 pm
You can always manually enter a delay into mkvmerge
MKVToolnix honors the delay you put to subs when muxing, I tried and asked on MKV thread too. I am asking how is possible to reverse engineer the delay when demuxing.
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Re: MKV demux support

Post by admin »

I don't think it is possible, because there is no Delay field in MKV. It is just used during muxing to adjust all the timestamps. Once that adjustment is made, that delay value is gone and assuming the right value was used, you would not need to re-apply it if re-muxing. You would have to play the movie with subtitles enabled to see if the sync is good. If not, a new delay value can be specified during the re-mux.

I'm getting ready to slipstream this later today. Please advise if you find anything I should know about.

Thanks, everybody, for your assistance with the design and testing of this new feature. :hat:
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