terryJones,
That is correct. Indeo gave their codec away for years and now started charging for it.
Here are the two Knowledge Base Articles that cover it:
Windows Media Player for Windows XP Supported Codecs
The information in this article applies to:
Microsoft Windows Media Player for Windows XP Home Edition
Microsoft Windows Media Player for Windows XP Professional
This article was previously published under Q291948
SUMMARY
This article provides a list of codecs that are supported in Microsoft Windows Media Player for Microsoft Windows XP.
MORE INFORMATION
The following codecs are supported in Windows Media Player for Windows XP:
Cinepak codec
ClearVideo Decoder Driver
Fraunhofer IIS MPEG Layer-3 Codec
Fraunhofer IIS MPEG Layer-3 Codec for MSACM
Intel Audio Codec
Intel I.263 Video Driver
Intel Indeo 3.0 Video Codec
Intel Indeo 5.0 Video Codec
Intel Indeo(R) Video Interactive 32-bit Driver
Intel RAW YVU9 Video Driver
Lernout And Hauspie Codecs
Microsoft MPEG-4 Standard Video Codec
Microsoft MPEG-4 Video Codec v1
Microsoft MPEG-4 Video Codec v2
Microsoft MPEG-4 Video Codec v3
Microsoft Network Audio CODEC
Microsoft Screen Video Decompressor
Microsoft Windows Media Video v7
Microsoft Windows Media Video v8
Sharp G.726 Audio Codec
Sipro Lab Audio Telecom CODEC (Acelp)
Streaming Animation Support
Vivo H.263 Video CODEC
Vivo Siren Audio CODEC
VivoActive Audio CODEC
Voxware MetaSound
Voxware MetaVoice
Windows Media Audio Codec
NOTE: Not all of the supported codecs are installed by default. These codecs will be downloadable when you play content that requires the codec.
"Unspecified Error" Message When Playing an Indeo Video Format (IVF) File
The information in this article applies to:
Microsoft Windows Media Player for Windows XP Home Edition
Microsoft Windows Media Player for Windows XP Professional
Microsoft Windows Media Player 7.1
Microsoft Windows Media Player 7
This article was previously published under Q281919
SYMPTOMS
When you attempt to play an Indeo Video Format (IVF) file in Windows Media Player, the file may not be played and you may receive the following error message:
Unspecified Error
CAUSE
This behavior can occur if you try to play the IVF file by using a Uniform Resource Locator (URL).
RESOLUTION
To work around this behavior, copy the file to your hard disk before you play it. To do so, follow these steps:
Right-click the link to the IVF file, and then click Save Target As.
Specify the location where you want to save the file.
Double-click the file on your hard disk to play it.
Take Care,
Richard