451a43f61da7baee559005881d94203e *tests/data/fate/matroska-zero-length-block.matroska
633 tests/data/fate/matroska-zero-length-block.matroska
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#media_type 0: subtitle
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0,       1000,       1000,     2000,        5, 0x05b801df
0,       3300,       3300,     3700,       16, 0x300705b2
[STREAM]
TAG:DESCRIPTION=This track uses header removal compression and has a Block of size zero before reversing it.
[/STREAM]