MKVToolNix v83.0 released

[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]

Originally Posted by 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"

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]

Originally Posted by magsoud

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

See:
https://gitlab.com/mbunkus/mkvtoolnix/issues/1026

gMKVExtractGUI
MKVcleaver

[Mosu]

Originally Posted by magsoud

Please Create mkvextract-gui.exe

I might, one day; there's even a feature request 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]

Originally Posted by foxyshadis

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
• MPC-HC 1.8.3

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

The latest continuous builds (Windows, Linux) 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, 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 (needs to be applied for every input file that has chapters)

[Anakunda]

Originally Posted by sneaker_ger

--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, the Windows installer/portable version & macOS DMG & Linux AppImage and the source code.

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 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.
* mkvmerge: AV1 packetizer: updated the code for the finalized AV1-in-Matroska & WebM mapping specification. Part of the implementation of #2261.
* mkvmerge: AV1 support: the `--engage enable_av1` option has been removed again. Part of the implementation of #2261.
* mkvmerge: MP4 reader: added support for AV1. Part of the implementation of #2261.
* mkvmerge: DTS: implemented dialog normalization gain removal for extension substreams. Implements #2377.
* mkvmerge, mkvextract: simple text subtitles: added a workaround for simple text subtitle tracks that don't contain a duration. Implements #2397.
* mkvextract: added support for extracting AV1 to IVF. Part of the implementation of #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.
* MKVToolNix GUI: automatic scaling for high DPI displays is activated if the GUI is compiled with Qt ≥ 5.6.0. Fixes #1996 and #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.


## Bug fixes

* mkvmerge: JSON identification: fixed a bug when removing invalid UTF-8 data from strings before they're output as JSON. Fixes #2398.
* mkvmerge: MP4/QuickTime reader: fixed handling of PCM audio with FourCC `in24`. Fixes #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.
* 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.

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.