[Matroska-devel] please help with EBML Lacing

[александр]

Hi!

Please help with EBML Lacing... I can't calculate correct frame sizes.

For example, I have such header of Simple Block:

A3 50 A6 82 02 00 86 07    9F E1 630A BD 98 5F11 AC  ... FirstFrameData

where:

A3   - Simple Block

50A6 - size = 4262

82   - Track Number = 2

0200 - uint - timecode = 512

86   - keyframe, EBML lacing

07   - Frame Count = 8

===

9F     - first Frame size: 10011111 = 31 
E1     - secont FrameSize = 0xE1 - 0x80 - 0x3F =  0x22 => 34+31= 65
630A  - 3rd = 0x630A - 0x4000 - 0x1FFF = 0x30B => 779+65 = 844
BD     - 4th = 61 + 844 =  905
...
etc, so I have following 8 frame sizes: 31, 65, 844, 905, 929, 8882, 8926, -16334
Last one with minus because total block size is just 4262.

If I look at the dump closely, I suppose that first 4 frame sizes must be: 31, 65, 860, 842

Please help to find  an error.

Best regards,
Alex.




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