> Hi,

> I'm the current maintainer of Directshow Filters for Ogg Vorbis,
> Speex, Theora and FLAC, and I would like to improve the Windows Media
> Player user experience when it comes to these file formats.

> Alex Zambelly wrote back in 2003 (http://tinyurl.com/bama4j)
> "I believe getting the metadata promotion to work correctly might
> require
> a more WMP-friendly plugin, as opposed to just a DirectShow filter.
> I'm
> actually surprised no one in the Ogg development community has looked
> into that yet."

> I have dumped all the interfaces that Windows Media Player 11 queries
> for the FLAC source filter:

> INFO: NonDelegatingQueryInterface: {56A86895-0AD4-11CE-
> B03A-0020AF0BA770}, [IBaseFilter]
> INFO: NonDelegatingQueryInterface: {56A868A6-0AD4-11CE-
> B03A-0020AF0BA770}, [IFileSourceFilter]
> INFO: NonDelegatingQueryInterface: {8E1C39A1-DE53-11CF-
> AA63-0080C744528D}, [IAMOpenProgress]
> INFO: NonDelegatingQueryInterface: {F90A6130-B658-11D2-
> AE49-0000F8754B99}, [IAMDeviceRemoval]
> INFO: NonDelegatingQueryInterface: {0000010C-0000-0000-
> C000-000000000046}, [IPersist]
> INFO: NonDelegatingQueryInterface: {FA2AA8F5-8B62-11D0-
> A520-000000000000}, [IAMNetShowExProps]
> INFO: NonDelegatingQueryInterface: {3C43D14F-25B3-4E34-A36C-
> F575DEEA29C0}, [Unknown GUID Name]
> INFO: NonDelegatingQueryInterface: {56A868FE-0AD4-11CE-
> B0A3-0020AF0BA770}, [IAMPlayList]
> INFO: NonDelegatingQueryInterface: {DFDFD197-A9CA-43D8-
> B341-6AF3503792CD}, [IMFVideoRenderer]
> INFO: NonDelegatingQueryInterface: {56A868B5-0AD4-11CE-
> B03A-0020AF0BA770}, [IBasicVideo]
> INFO: NonDelegatingQueryInterface: {81A3BD32-
> DEE1-11D1-8508-00A0C91F9CA0}, [IMixerOCX]
> INFO: NonDelegatingQueryInterface:
> {095CAB33-2B11-46F7-8107-6B67D4065CD6}, [IWMPVideoNodeInternal]
> INFO: NonDelegatingQueryInterface: {36B73880-
> C2C8-11CF-8B46-00805F6CEF60}, [IMediaSeeking]
> INFO: NonDelegatingQueryInterface: {56A868B2-0AD4-11CE-
> B03A-0020AF0BA770}, [IMediaPosition]
> INFO: NonDelegatingQueryInterface: {2DD74950-A890-11D1-
> ABE8-00A0C905F375}, [IAMFilterMiscFlags]
> INFO: NonDelegatingQueryInterface: {56A868B4-0AD4-11CE-
> B03A-0020AF0BA770}, [IVideoWindow]
> INFO: NonDelegatingQueryInterface: {56A868B3-0AD4-11CE-
> B03A-0020AF0BA770}, [IBasicAudio]
> INFO: NonDelegatingQueryInterface: {B8E8BD60-0BFE-11D0-
> AF91-00AA00B67A42}, [IIPDVDec]
> INFO: NonDelegatingQueryInterface: {C1960960-17F5-11D1-
> ABE1-00A0C905F375}, [IAMStreamSelect]
> INFO: NonDelegatingQueryInterface: {B45DD570-3C77-11D1-
> ABE1-00A0C905F375}, [IID_IMpegAudioDecoder]
> INFO: NonDelegatingQueryInterface: {5738E040-B67F-11D0-
> BD4D-00A0C911CE86}, [IPersistMediaPropertyBag]
> INFO: NonDelegatingQueryInterface: {0BB53976-978F-41F9-A66B-
> A29CC318A817}, [Unknown GUID Name]
> INFO: NonDelegatingQueryInterface:
> {55272A00-42CB-11CE-8135-00AA004BB851}, [IPropertyBag]

> There are two unknown interfaces {3C43D14F-25B3-4E34-A36C-
> F575DEEA29C0} and {0BB53976-978F-41F9-A66B-A29CC318A817}, are they
> responsible for querying metadata? maybe, maybe not.

> This metadata should be added by somebody in the database, like Jim
> Travis suggested on this
> thread http://tinyurl.com/c3aqur by using IWMPMedia::setItemInfo. Is
> there a possibility that Windows Media Player would ask somebody about
> the metadata?

> WMP Tag Support Extender (http://wmptagext.sourceforge.net/) project
> has created a Windows Media Player plugin which spies on events and
> adds the metadata, is this the only way to add metadata for 3rd
> parties? by creating an Windows Media Player plugin?

> Windows Media Player 10 Mobile uses information acquired from
> IAMMediaContent interface - http://tinyurl.com/abpvhe is this an
> accident?

> Another problem I'm facing is that if I try to play a FLAC file
> directly from the Library the duration is set to 00:00 and seeking is
> not possible.

> If I play the file directly by invoking "%programfiles%\windows media
> player\wmplayer.exe" file duration is determined correctly, seeking
> works.

> If I have made a playlist and play the file from there the duration is
> set correctly and seeking works.
> How can I overcome this problem?

> Many thanks,
> Cristian.