MKVToolNix v99.0 released

[hubblec4]

Many thanks for the fast fix for "dialog normalization gain removal".

[hubblec4]

Hi Mosu

I have some question about attachments. When I use MTX-GUI and add an attach file the MIME-Type is set automatically.
But when I create an mtxcfg can I scan/identify the attach file and mkvmerge tells me the MIME-Type?
When the MIME-Type is not set in an mtxcfg file, set mkvmerge this value automatically?

hubble

[Mosu]

But when I create an mtxcfg can I scan/identify the attach file and mkvmerge tells me the MIME-Type?
When the MIME-Type is not set in an mtxcfg file, set mkvmerge this value automatically?

There's no such functionality. However, you shouldn't need it that functionality as mkvmerge does indeed derive the MIME type automatically if it isn't set. The GUI allows for the MIME type to be empty, too, even though the drop-down box doesn't contain an empty entry. You can, however, simply remove the MIME type's name manually.

[hubblec4]

However, you shouldn't need it that functionality as mkvmerge does indeed derive the MIME type automatically if it isn't set.

That sounds great, thanks for your explanation.

[hubblec4]

I have a new PC and now the mtxcfg file have one line only. What was the way I have to go, so that mtxcfg file is human friendly readable?

[Mosu]

The environment variable "MTX_JSON_FORMAT" has to be set to "indented".

[hubblec4]

Thanks. After restart MTX it works.

[hubblec4]

After restart MTX it works.

That was not correct, I have to restart my PC. Why is this option so "complicated" to set up? Is there no way to have an option inside MTX?

[Mosu]

Regular users simply don't need this. It's meant solely for developers.

[gpower2]

The environment variable "MTX_JSON_FORMAT" has to be set to "indented".

That was not correct, I have to restart my PC. Why is this option so "complicated" to set up? Is there no way to have an option inside MTX?

You could set this option inside your code so that you won't have to change it manually.
In .NET you can use "Environment.GetEnvironmentVariable" and "Environment.SetEnvironmentVariable" in order to manipulate environment variables, I am pretty sure you could find the equivalents for the language you use. ;)

[hubblec4]

You could set this option inside your code so that you won't have to change it manually.
Thanks for this info, but I don't need it inside my code.
I don't use MTX-GUI since my chapterEditor is ready, but to see if my mtxcfg file is correctly created, I need the MTX-GUI to check this.



In .NET you can use "Environment.GetEnvironmentVariable" and "Environment.SetEnvironmentVariable" in order to manipulate environment variables, ....
Lazarus can also work with the "System Environments" but I don't like to set options in the system directly (like Windows registry).
chapterEditor stays portable and will never touch system entries, all settings can be stored in files.



@Mosu
What is with Linux and mtxcfg file, I think there is no environment variable which I can setup up, or?

[Mosu]

What is with Linux and mtxcfg file, I think there is no environment variable which I can setup up, or?

Huh? Of course you can set environment variables in Linux. Where exactly depends on the shell & desktop environment the user uses.

[hubblec4]

A suggestion. MTX uses an ini file, could you add there an option for this task?
Init is 0 for disabled human friendly readable and 1 for enabled.
A developer can change this setting easy and fast, and most important you don't have to restart the system.

[lvqcl]

and most important you don't have to restart the system.
Open command line window, set the environment variable, and start mkvtoolnix-gui.exe from that window. This should do the trick.

[Mosu]

I really don't see a reason to do anything in this regard. Setting an environment variable is trivial; logging out & back in again suffices; you usually only have to do it once per installation. And that's for the very few people who actually need that feature.

[tkwou]

Hi I've had to do OS re-install with Windows 2008 Server R2. I re-installed Mkvtoolsnix but now Mkvtoolsnix-gui.exe refuses to open. Mkvtoolsnix-gui ran fine before the OS re-install. Mkvmerge continues to work as my Ripbot264 still runs fine. I'm sure there must be a .dll dependency problem. I'm either missing or have the wrong versions of the necessary .dll's. Does it require a specific VC runtime version?

[Mosu]

It requires the Windows Media Foundation libraries to be installed. See this FAQ entry (https://gitlab.com/mbunkus/mkvtoolnix/wikis/DLLs-not-found).

[tkwou]

Thanks, I have Media Foundations installed with media streaming role installed. I'm getting "the program can't start because api-ms-win-core-libraryloader-l1-2-0.dll is missing from your computer. Try reinstalling the program to fix this problem"

[mkver]

Sounds like your Windows installation is corrupt. Run "sfc /scannow" in an elevated command prompt.

[tkwou]

I've already done that and it's passed verification.

[Selur]

Seeing that some sides as elecard (https://www.elecard.com/videos) offer webm, I wonder is the webm spec for including av1 finished?

[Mosu]

Kind of, yeah. Steve Lhommes pull request was merged to the Matroska specs a few weeks ago.

[hubblec4]

Hi Mosu

I have some questions about two track flags: Default and Forced. (subtitle tracks)

If a Forced flag is set to true then a Player must use this track and have to ignore the Default track, right?
And I guess only one track should have that Forced flag set to true? If more Forced flags set to true, the first track wins?

[Mosu]

Citing the specs for "forced":

Set if that track MUST be active during playback. There can be many forced track for a kind (audio, video or subs), the player SHOULD select the one which language matches the user preference or the default forced track. Overlay MAY happen between a forced and non-forced track of the same kind. (1 bit)

This means:

Multiple subtitle tracks can be played at the same time. In fact, the Matroska specs do not stipulate anything about the number of tracks of a type that can be active at the same time.
Forced tracks are not supposed to replace non-forced ones.
Multiple subtitle tracks can have the "forced" flag set. Think of Lord of the Rings when Elvish is spoken. You would likely have one forced subtitle track for each language Elvish is translated into. It's up to the player to select from all of those, most likely based on the track's language and the user's preferences regarding languages.

[sneaker_ger]

Also note few (none?) players stick 100% to the specs in that regard.

[magsoud]

Hi Mosu
Please Create mkvextract-gui.exe
https://pasteboard.co/HGEkYJ9.png

[foxyshadis]

Thanks, I have Media Foundations installed with media streaming role installed. I'm getting "the program can't start because api-ms-win-core-libraryloader-l1-2-0.dll is missing from your computer. Try reinstalling the program to fix this problem"

I did some research, and it looks like these errors happen when your paths somehow point you to the wrong bitness of files, ie, 32-bit when you're using 64-bit software or vice versa.

[sneaker_ger]

Hi Mosu
Please Create mkvextract-gui.exe
https://pasteboard.co/HGEkYJ9.png
See:
https://gitlab.com/mbunkus/mkvtoolnix/issues/1026

gMKVExtractGUI (https://forum.doom9.org/showthread.php?t=170249)
MKVcleaver (https://forum.doom9.org/showthread.php?t=152108)

[Mosu]

Please Create mkvextract-gui.exe

I might, one day; there's even a feature request (https://gitlab.com/mbunkus/mkvtoolnix/issues/1026) open for it. But it really has no priority for me as there are several third-party alternatives available. sneaker_ger has linked to a couple already.

[tkwou]

I did some research, and it looks like these errors happen when your paths somehow point you to the wrong bitness of files, ie, 32-bit when you're using 64-bit software or vice versa.

Thanks foxyshadis. I considered that so I tried running "Dependency Walker". It's not showing any 32-bit 64-bit .dll mismatches when I open the mkvtoolnix-gui.exe.

[Mosu]

AV1 support in MKVToolNix is ready for testing. The input, output and parser code has been adjusted to the finalized AV1 bitstream spec as well as the codec mappings for AV1 in Matroska/WebM and MP4.

mkvmerge can read AV1 from Matroska/WebM, MP4, IVF files and raw OBU streams.
mkvmerge can write AV1 in both Matroska and WebM modes.
mkvextract can extract AV1 to IVF files.
The GUI knows about all of that.
The "--engage enable_av1" option was removed as support isn't experimental anymore.

Note that you need very new or even unreleased players in order to play back AV1 in Matroska/WebM (no matter if they were created by mkvmerge or by aomenc). I've successfully played content with:

VLC nightly 3.0.5-20181011-0535 (https://nightlies.videolan.org/build/win64/)
MPC-HC 1.8.3 (https://github.com/clsid2/mpc-hc/releases)

Test files were created with aomenc revision 7cae98f4e from 2018-10-03. MP4 test files were obtained from Youtube.

The latest continuous builds (Windows (https://mkvtoolnix.download/windows/continuous/), Linux (https://mkvtoolnix.download/appimage/continuous/)) contain the changes.

I appreciate testing, but reports, test files and any other kind of feedback. Thanks!

[v0lt]

The MKVToolNix incorrectly limits the size when splitting. I asked 4480M, but got 4486 MB.

[Mosu]

No, it doesn't. Read this FAQ entry (https://gitlab.com/mbunkus/mkvtoolnix/wikis/Splitting-imprecise), please.

[Anakunda]

Hi, is there an option for mkvmerge, that discards in final mux all chaptering info from source files?
That means one file, one chapter.

[sneaker_ger]

--no-chapters (https://mkvtoolnix.download/doc/mkvmerge.html#mkvmerge.description.no_chapters) (needs to be applied for every input file that has chapters)

[Anakunda]

--no-chapters (https://mkvtoolnix.download/doc/mkvmerge.html#mkvmerge.description.no_chapters) (needs to be applied for every input file that has chapters)

Tried that but some files still appear as two or more tracks so they do contain some internal indexing, tho mediainfo shows only one chapter.

[mkver]

It's completely normal to have more than one track and it has nothing to do with chapters. If mediainfo shows only one chapter, is it possible that you let MKVToolNix generate one chapter per appended file on the output tab (which generates one chapter even if no file has been appended)?

[Mosu]

Hey,

here is MKVToolNix v28.0.0: the first release to support AV1 in its finalized form. mkvmerge can read it from Matroska/WebM, MP4, IVF container files and from raw OBU streams. mkvextract will extract it to IVF files. Apart from that a couple of bugs were fixed and usabitliy enhancements made.

Here are the usual links: the MKVToolNix home page (https://mkvtoolnix.download/), the Windows installer/portable version & macOS DMG & Linux AppImage (https://www.fosshub.com/MKVToolNix.html) and the source code (https://mkvtoolnix.download/source.html).

The Windows and macOS binaries as well as the Linux AppImage are available already. The other Linux binaries are still being built and will be available of the course of the next couple of hours.

Here are the NEWS (https://mkvtoolnix.download/doc/NEWS.md) since the previous release:

# Version 28.0.0 "Voice In My Head" 2018-10-20

## New features and enhancements

* mkvmerge: AV1 parser: updated the code for the finalized AV1 bitstream specification. Part of the implementation of #2261 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2261).
* mkvmerge: AV1 packetizer: updated the code for the finalized AV1-in-Matroska & WebM mapping specification. Part of the implementation of #2261 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2261).
* mkvmerge: AV1 support: the `--engage enable_av1` option has been removed again. Part of the implementation of #2261 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2261).
* mkvmerge: MP4 reader: added support for AV1. Part of the implementation of #2261 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2261).
* mkvmerge: DTS: implemented dialog normalization gain removal for extension substreams. Implements #2377 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2377).
* mkvmerge, mkvextract: simple text subtitles: added a workaround for simple text subtitle tracks that don't contain a duration. Implements #2397 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2397).
* mkvextract: added support for extracting AV1 to IVF. Part of the implementation of #2261 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2261).
* mkvextract: IVF extractor (AV1, VP8, VP9): precise values will be used for the frame rate numerator & denominator header fields for certain well-known values of the track's default duration.
* mkvmerge: VP9: mkvmerge will now create codec private data according to the VP9 codec mapping described in the WebM specifications. Implements #2379 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2379).
* MKVToolNix GUI: automatic scaling for high DPI displays is activated if the GUI is compiled with Qt ≥ 5.6.0. Fixes #1996 (https://gitlab.com/mbunkus/mkvtoolnix/issues/1996) and #2383 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2383).
* MKVToolNix GUI: added a menu item ("Help" → "System information") for displaying information about the system MKVToolNix is running on in order to make debugging easier.
* MKVToolNix GUI: multiplexer, header editor: the user can enter a list of predefined track names in the preferences. She can later select from them in "track name" combo box. Implements #2230 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2230).


## Bug fixes

* mkvmerge: JSON identification: fixed a bug when removing invalid UTF-8 data from strings before they're output as JSON. Fixes #2398 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2398).
* mkvmerge: MP4/QuickTime reader: fixed handling of PCM audio with FourCC `in24`. Fixes #2391 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2391).
* mkvmerge: MPEG transport stream reader, teletext subtitles: the decision whether or not to keep frames around in order to potentially merge them with the following frame is made sooner. That avoids problems if there are large gaps between teletext subtitle frames which could lead to frames being interleaved too late. Fixes #2393 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2393).
* mkvextract: IVF extractor (AV1, VP8, VP8): the frame rate header fields weren't clamped to 16 bits properly causing wrong frame rates to be written in certain situations.
* mkvpropedit, MKVToolNix GUI's header editor: fixed file corruption when a one-byte space must be covered with a new EBML void element but all surrounding elements have a "size length" field that's eight bytes long already. Fixes #2406 (https://gitlab.com/mbunkus/mkvtoolnix/issues/2406).

Have fun :)

[sneaker_ger]

Thx. Is AV1 as "simple" as VP9 or can we except as many bugs as with AVC and HEVC?

[Mosu]

AV1 is much, much simpler to handle (from the container POV) than AVC & HEVC. Doesn't mean there are or won't be any bugs.

[Selur]

Nice thanks for the release! :)

Cu Selur

[Sparktank]

Thanks for the update! Saw it on videohelp today.

[Anakunda]

It's completely normal to have more than one track and it has nothing to do with chapters. If mediainfo shows only one chapter, is it possible that you let MKVToolNix generate one chapter per appended file on the output tab (which generates one chapter even if no file has been appended)?

Yeah there's just one chapter

+ EBML head
|+ EBML version: 1
|+ EBML read version: 1
|+ Maximum EBML ID length: 4
|+ Maximum EBML size length: 8
|+ Document type: matroska
|+ Document type version: 4
|+ Document type read version: 2
+ Segment: size 107467001
|+ Seek head (subentries will be skipped)
|+ EBML void: size 4012
|+ Segment information
| + Timestamp scale: 10415
| + Multiplexing application: libebml v1.3.6 + libmatroska v1.4.9
| + Writing application: mkvmerge v28.0.0 ('Voice In My Head') 64-bit
| + Duration: 00:03:06.531243975
| + Date: Sun Oct 21 09:52:20 2018 UTC
| + Segment UID: 0x0b 0xda 0x42 0x28 0xa1 0xa6 0xd2 0x36 0x8a 0xb9 0x87 0x10 0x7b 0x5d 0x32 0x5e
|+ Tracks
| + Track
| + Track number: 1 (track ID for mkvmerge & mkvextract: 0)
| + Track UID: 8584554008224039298
| + Track type: audio
| + Codec ID: A_PCM/INT/LIT
| + Default duration: 00:00:00.031250000 (32.000 frames/fields per second for a video track)
| + Language: und
| + Audio track
| + Sampling frequency: 96000
| + Channels: 2
| + Bit depth: 24
|+ EBML void: size 1060
|+ Chapters
| + Edition entry
| + Edition flag hidden: 0
| + Edition flag default: 0
| + Edition UID: 6837861688061832105
| + Chapter atom
| + Chapter UID: 2623445988119765238
| + Chapter time start: 00:00:00.000000000
| + Chapter flag hidden: 0
| + Chapter flag enabled: 1
| + Chapter display
| + Chapter string: 00:00:00.000
| + Chapter language: eng
| + Chapter atom
| + Chapter UID: 2179528021987700301
| + Chapter time start: 00:00:00.000746760
| + Chapter flag hidden: 0
| + Chapter flag enabled: 1
| + Chapter display
| + Chapter string: 00:03:18.907
| + Chapter language: eng
|+ EBML void: size 800
|+ Cluster


General
Unique ID : 15754770526983769576157346589482758750 (0xBDA4228A1A6D2368AB987107B5D325E)
Complete name : stereo-002.mka
Format : Matroska
Format version : Version 4
File size : 102 MiB
Duration : 3 min 6 s
Overall bit rate mode : Constant
Overall bit rate : 4 609 kb/s
Encoded date : UTC 2018-10-21 09:52:20
Writing application : mkvmerge v28.0.0 ('Voice In My Head') 64-bit
Writing library : libebml v1.3.6 + libmatroska v1.4.9

Audio
ID : 1
Format : PCM
Format settings : Little / Signed
Codec ID : A_PCM/INT/LIT
Duration : 3 min 6 s
Bit rate mode : Constant
Bit rate : 4 608 kb/s
Channel(s) : 2 channels
Sampling rate : 96.0 kHz
Frame rate : 32.000 FPS (3000 SPF)
Bit depth : 24 bits
Stream size : 102 MiB (100%)
Default : Yes
Forced : No

Menu
00:00:00.000 : en:00:00:00.000 / en:00:03:18.907

But in foobar I get
stereo-002 (72 samples)
stereo-002 (17906928 samples)

Is that a something kinda pregap?
How do I force mkvmerge to load the file in media player as one continuous track?

[mkver]

1. There are two chapters:

| + Chapter atom
| + Chapter UID: 2623445988119765238
| + Chapter time start: 00:00:00.000000000
| + Chapter flag hidden: 0
| + Chapter flag enabled: 1
| + Chapter display
| + Chapter string: 00:00:00.000
| + Chapter language: eng
| + Chapter atom
| + Chapter UID: 2179528021987700301
| + Chapter time start: 00:00:00.000746760
| + Chapter flag hidden: 0
| + Chapter flag enabled: 1
| + Chapter display
| + Chapter string: 00:03:18.907
| + Chapter language: eng

The last chapter begins at 746760ns (~71,68896 samples at 96kHz). The title of the chapter and the naming of the file suggests that this track corresponds to the second track of an album and that this track started at 3:18.907.
2. I don't know whether this a pregap or not. Actually, nobody could know given the information you provided. One could only guess. And judging by the sample rate it comes from some source other than an audio CD and I have no experience with such a format; in particular I don't know whether there is pregap is usual in these circles.
3. Could you describe in way more detail what your input files were and what your mkvmerge command was (you can go to multiplexer->show command line) and what you did expect and what happened instead? (I think I can already guess the answer to the last two questions, but not the other ones.)
4. a) mkvmerge cannot "force" any player to do anything.
b) Actually, having chapters doesn't mean that the file is discontinuous. A gap would mean that the file is discontinuous, but there is no reason to assume that there is a gap.
c) I don't know why foobar produces a gap between the two chapters. I thought that being an audio player, it is specifically designed for gapless playback so that even when different items of a playlist exist in separate files, they are played without gaps.

[v0lt]

No, it doesn't. Read this FAQ entry (https://gitlab.com/mbunkus/mkvtoolnix/wikis/Splitting-imprecise), please.
I understand why this is happening. MKVToolNix enlarges the file until the next keyframe appears.
But when I split a file by size, I want the file to be no more than the specified size. I would like the MKVToolNix should discard an incomplete group of frames.

Is it possible to do this file splitting mode?

[Ex0rcist]

Is there any mkv extractor which is capable of applying audio delay when extracting audio/video files?

[Anakunda]

@mkver: I don't say there's a gap, but indexing that makes a pregap. There's really one chapter but two atoms, call it microchapters, which foobar recognizes and splits to more virtual tracks. The more is weird where mkvmerge took the 72 samples microindexing, when the original chapters file was

CHAPTER01=00:00:00.000
CHAPTER01NAME=
CHAPTER02=00:03:18.907
CHAPTER02NAME=
CHAPTER03=00:06:25.427
CHAPTER03NAME=
CHAPTER04=00:10:17.116
CHAPTER04NAME=
CHAPTER05=00:14:05.803
CHAPTER05NAME=
CHAPTER06=00:16:24.609
CHAPTER06NAME=
CHAPTER07=00:18:57.094
CHAPTER07NAME=
CHAPTER08=00:23:33.412
CHAPTER08NAME=
CHAPTER09=00:27:11.547
CHAPTER09NAME=
CHAPTER10=00:30:01.174
CHAPTER10NAME=
CHAPTER11=00:36:00.533
CHAPTER11NAME=
CHAPTER12=00:39:47.218
CHAPTER12NAME=
CHAPTER13=00:44:49.312
CHAPTER13NAME=
CHAPTER14=00:48:18.312
CHAPTER14NAME=
CHAPTER15=00:51:15.781
CHAPTER15NAME=
CHAPTER16=00:58:06.358
CHAPTER16NAME=

Note there are no pregaps just true tracks boundings

[mkver]

This doesn't answer my questions: What input files did you give mkvmerge? What were your settings?
But it did give me a clue where the 72 samples came from: In Matroska, PCM data is not put in one gigantic block of data like in wav. Instead, it is put in smaller blocks and these blocks are interleaved according to their timestamps ("interleave" means that you put blocks with similar timestamp (even from different tracks) near to one another so that one could use a PCM track as an audio track for a video and play the file without having to constantly seek to the place where the audio is stored and back to the place where the video is stored). As the Mediainfo above says, there are 3000 samples per Matroska block. 3:18.907 at 96kHz are 19.095.072 samples or 6365 of these blocks of 3000 samples with a remainder of 72 samples. With normal tracks, one can't simply split inside a block -- they are like atoms for Matroska and mkvmerge (ok, there are exceptions: mkvmerge allows to strip DTS extensions away). One either has to keep a block in an output file or one doesn't keep said block in an output file when splitting (hypothetically one could use DiscardPadding, but that's not used...). But with PCM data, one could be more precise and split sample accurately, but apparently the tool you used for splitting (I guess it is mkvmerge, but you still haven't told me what you were actually doing!) didn't do it and simply splitted after 6365 blocks with 3000 samples each. The second chapter position (at 72 samples) corresponds to the start of the second track, the first chapter is just leftover from the last track.

The first block of PCM data to be kept has a precise timestamp of 3:18.90625. mkmverge allows up to 1 ms of deviation when determining which blocks to keep. As 3:18.90625 is less than 1ms away from 3:18.907, this block is kept.

[Anakunda]

Input files - chapters file and audio track (WAV)

--output stereo.mka stereo.w64 --split chapters:all --chapters chapters.txt --no-chapters

I still am sure PCM data can be cut accurately and not by blocks or rounded to frames like CDA.

[sneaker_ger]

JFYI: Input options belong before the respective input file, i.e.
--output stereo.mka --no-chapters stereo.w64 --split chapters:all --chapters chapters.txt
(I guess it doesn't matter here as w64 shouldn't have chapters.)