mkvmerge: MP3 packetizer: the MP3 packetizer will no longer drop timestamps from source containers if they go backwards. mkvmerge: Matroska reader: fixed handling BlockGroups and SimpleBlocks with negative timestamps. mkvinfo: the timestamps of SimpleBlocks with negative timestamps are now shown correctly.

mkvmerge: MP4 reader: offsets in 'ctts' are now always treated as signed integers, even with version 0 atoms. Bug fixes: mkvmerge: MP4 reader: fixed track offsets being wrong in certain situations regarding the presence or absence of edit lists (elst atoms) & composition timestamps (ctts atoms). mkvmerge: HEVC/h.265 parser: added a workaround for invalid values for the 'default display window' in the VUI parameters of sequence parameter sets.

mkvmerge: HEVC/h.265 parser: mkvmerge will now drop all frames before the first key frame as they cannot be decoded properly anyway.

New features and enhancements: mkvmerge: AVC/h.264 parser: mkvmerge will now drop all frames before the first key frame as they cannot be decoded properly anyway.

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