tsengyichun
Joined: 30 Dec 2005
Posts: 1
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 Posted:
Fri Dec 30, 2005 8:55 am Post subject:
wma header issue |
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I have some questions about wma header.
In WAVEFORMATEX header, the Codec Specific Data field is not explained.
It seems that the field is relative to the wma codec. The below binary is captured from a ASF file( audio codec is wma ):
61 01 02 00 22 56 00 00 A6 0F 00 00 E8 02 10 00
0A 00 00 44 00 00 17 00 41 17 00 00 01 E8 02 E8
02 01 00 00
Codec ID : 01 61
Number of Channels : 00 02
Samples Per Second : 00 00 56 22
Average Number of Bytes Per Second: 00 00 of a6
Block Alignment: 02 e8
Bits Per Sample: 00 10
Codec Specific Data Size: 00 0A
Codec Specific Data: 00 44 00 00 17 00 41 17 00 00
I don't understand the Codec Specific Data field. If you understan the wma codec or you have the spec of wma , can you tell me? 
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