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wmainfo

wmainfo is a library for reading low level information from files encapsulated in an Advanced Systems Format header. Files of this type typically have a .wma extension for audio only files, and .wmv for video files. wmainfo is available for both Ruby and Python, and both of these libraries are ports of Dan Sully's Audio-WMA Perl module. All credit for the hard work is owed to Dan.

wmainfo can extract the following information:

• Content, size and offset of objects in the ASF_Header_Object
• Meta-tags from the ASF_Content_Description_Object
• Information from the ASF_File_Properties_Object (filesize, bitrate, creation date etc)
• Additional tags/info from ASF_Extended_Content_Description_Object
• Check for *Content_Encryption_Object(s) to see if the file is DRMed
• Contents of Asf_Stream_Properties_Object

download

wmainfo-rb Ruby library

Download the Ruby library from the wmainfo-rb rubyforge project page.
You can also install via remote gems:

# gem install -r wmainfo-rb

And you can also use this ebuild file if you run Gentoo:

wmainfo-rb-0.5.ebuild

wmainfo-py Python library

Newest:

• wmainfo-py-0.3 tarball
• wmainfo-py-0.3 zip archive

Older:

• wmainfo-py-0.2 tarball
• wmainfo-py-0.2 zip archive
• wmainfo-py-0.1 tarball

usage examples

wmainfo-rb Ruby library

irb(main):001:0> require 'wmainfo'
=> true
irb(main):002:0> file = WmaInfo.new("heartOfStone.wma")
    ...irb output omitted...
irb(main):003:0> file.tags
=> {"rating"=>"", "title"=>"Heart Of Stone", "author"=>"The Rolling Stones", 
"description"=>"", "copyright"=>""}
irb(main):004:0> file.info
=> {"seekable"=>2, "preroll"=>1578, "send_duration"=>1697700000, "broadcast"=>0, 
"playtime_seconds"=>170, "play_duration"=>1712940000, "creation_date"=>127340750804910000, 
"min_packet_size"=>4490, "data_packets"=>457, "bitrate"=>96, "max_bitrate"=>96647, 
"max_packet_size"=>4490, "creation_date_unix"=>1089601480, "filesize"=>2054339, 
"creation_string"=>Sun Jul 11 20:04:40 PDT 2004, "fileid_guid"=>
"2A354329-09B6-473A-B449-610E2116509D"}
irb(main):005:0> file.print_objects
ASF_Codec_List_Object: 86D15240-311D-11D0-A3A4-00A0C90348F6 170 1941
ASF_Stream_Properties_Object: B7DC0791-A9B7-11CF-8EE6-00C00C205365 114 2111
ASF_Header_Object: 75B22630-668E-11CF-A6D9-00AA0062CE6C 2359 7
ASF_Extended_Content_Description_Object: D2D0A440-E307-11D2-97F0-00A0C95EA850 314 1627
ASF_Content_Description_Object: 75B22633-668E-11CF-A6D9-00AA0062CE6C 102 2257
ASF_File_Properties_Object: 8CABDCA1-A947-11CF-8EE4-00C00C205365 104 30
ASF_Stream_Bitrate_Properties_Object: 7BF875CE-468D-11D1-8D82-006097C9A2B2 32 2225
ASF_Header_Extension_Object: 5FBF03B5-A92E-11CF-8EE3-00C00C205365 1493 134
    ...irb output omitted...
irb(main):006:0> file.hasdrm?
=> false

You can also see the rdoc documentation for wmainfo-rb.

wmainfo-py Python library

>>> import wmainfo
>>> file = wmainfo.WmaInfo("heartOfStone.wma")
>>> file.tags
{'Rating': u'', u'AlbumTitle': u'The Rolling Stones Now', 'Description': u'',
'Copyright': u'', 'Author': u'The Rolling Stones', 'Title': u'Heart Of Stone',
u'Year': u'1965', u'TrackNumber': 4L}
>>> file.info
{'fileid_guid': '2A354329-09B6-473A-B449-610E2116509D', 'send_duration': 1697700000L, 
'max_packet_size': 4490L, 'creation_string': 'Mon Jul 12 03:04:40 2004', 'preroll': 
1578L, 'min_packet_size': 4490L, 'play_duration': 1712940000L, 'data_packets': 457L, 
'creation_date': 127340750804910000L, 'broadcast': 0L, 'playtime_seconds': 170L, 
'creation_date_unix': 1089601480, 'seekable': 2L, 'max_bitrate': 96647L, 'bitrate': 
96L, 'filesize': 2054339L}
>>> file.printobjects()
ASF_Extended_Content_Description_Object: D2D0A440-E307-11D2-97F0-00A0C95EA850 314 1627
ASF_Stream_Properties_Object: B7DC0791-A9B7-11CF-8EE6-00C00C205365 114 2111
ASF_Content_Description_Object: 75B22633-668E-11CF-A6D9-00AA0062CE6C 102 2257
ASF_File_Properties_Object: 8CABDCA1-A947-11CF-8EE4-00C00C205365 104 30
ASF_Stream_Bitrate_Properties_Object: 7BF875CE-468D-11D1-8D82-006097C9A2B2 32 2225
ASF_Codec_List_Object: 86D15240-311D-11D0-A3A4-00A0C90348F6 170 1941
ASF_Header_Extension_Object: 5FBF03B5-A92E-11CF-8EE3-00C00C205365 1493 134
ASF_Header_Object: 75B22630-668E-11CF-A6D9-00AA0062CE6C 2359 7
>>> file.hasdrm()
False

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