The source material is taken from the Elephant Dreams video project It contains H264 (1024x576 pixels), and stereo AAC. This file also contains CRC-32 values in the EBML header, the MetaSeek, the Segment Info, the Tracks and the Tags and PrevSize/Position in the Clusters for better error recovery. The aspect ratio has also been stretched artificially to represent a 2.35 movie (from the original 16:9 aspect ratio). That value affects the values of the file Duration in the Segment and the Clusters Timecode. The main one is the global TimecodeScale in the SegmentInfo is set to 100,000 rather than the default 1,000,000. This file has different features that need to be looked at carefully. It contains MPEG4.2 (DivX) video, (854x480) MP3 audio, uses only SimpleBlock (matroska DocType v2)ΔΆ. The sample comes from the Big Buck Bunny open project. This file is the absolute minimum a compliant player should be able to handle. Matroska should be able to support all the formats, but given the subject is really new, it's not covered by this suite of files. There is also 3D support that is meant to grow in the coming years. We won't blame you if you don't support these, but your users/customers will probably ask for it at some point. There are a number of features that are not essential to the playback experience but could really improve it, like support for tags, cover art, embedded fonts, segment linking. Those files should be handled as well, as long as the codec is supported. It is important to note that audio can also be used in audio only files, usually with the.
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