What is matroska codec

There MAY be further additions to v4. Attacks on a Matroska Reader could include:. RFC] [! RFC] when, and only when, they appear in all capitals, as shown here. This document defines specific terms in order to define the format and application of Matroska. Specific terms are defined below:. All top-levels elements Segment and direct sub-elements are coded on 4 octets — i.

Matroska from version 1 through 3 uses language codes that can be either the 3 letters bibliographic ISO form [! Starting in Matroska version 4, either [! ISO] or [! Country codes are the same 2 octets country-codes as in Internet domains [!

IANADomains] based on [! ISO] alpha-2 codes. Each level can have different meanings for audio and video. Here is the list of possible levels for both audio and video:. That means the references first, and then the frames referencing them. A consequence is that timestamps might not be consecutive. Lacing is a mechanism to save space when storing data. It is typically used for small blocks of data referred to as frames in Matroska.

There are 3 types of lacing:. LBR audio streams. Description: DTS Lossless audio that does not have a core substream. Initialization: The Private Data contains the first three Vorbis packet in order. These include the first header packet containing only the word fLaC as well as all metadata packets. Description: Channel number and sample rate have to be read from the corresponding audio element.

The header and seektable are dropped. Description: The Wavpack packets consist of a stripped header followed by the frame data. For more details, check the WavPack muxing description. Each event is stored in its own Block.

The timestamp in the block header of Matroska indicates the start display time, the duration is set with the Duration element. Description: This is the graphical subtitle format used in the Digital Video Broadcasting standard. Description: The same subtitle format used on DVDs.

Supported is only format version 7 and newer. VobSubs consist of two files, the. All remaining lines but the ones containing timestamps and file positions are put into the CodecPrivate element.

For each line containing the timestamp and file position data is read from the appropriate position in the. Description: This is the graphical subtitle format used on Blu-rays. For more information, see hdmv-text-subtitles on HDMV text presentation. Description: This is the textual subtitle format used on Blu-rays. For more information, see hdmv-presentation-graphics-subtitles on HDMV graphics presentation.

Description: A subtitle format developed for ogg. The mapping for Matroska is described on the Xiph wiki. As for Theora and Vorbis, Kate headers are stored in the private data as xiph-laced packets. The rest is full PCI packets. Description: the BlockAdditional data is interpreted as opaque additional data passed to the codec with the Block data.

There are currently 2 different tools to do this look here for the announcement of their latest versions , but the list keeps on growing. Of course, this doesnt make much sense if you dont have any plans to add something to the file that AVI or OGM cannot support, like adding another audio track in an unsupported audio compression format.

From VirtualdubMod you can also directly encode into. A: On the download page you will find links to several players and components that allow you to play back Matroska files.

Many operating systems nowadays come with Matroska capabilities out of the box, too. A: You can embed lyrics or transcriptions e. You can use chapters to separate parts of a track or a live album.

This is a little complex but we will try to explain. First Ogg is not the same thing as Ogm. Ogg is an RFC spec now, and is very useful for what it was designed for, streaming over lossy links, and Ogm is an implementation of Ogg placing other 'things' inside.

Will Matroska be streamable? Yes, but low bitrate streaming like streaming Vorbis, will always be better in Ogg. This is because their design is for different purposes. Menu Home What is Matroska? Q: What is matroska? Q: What are the advantages of matroska compared to AVI?