Intel Indeo video/audio codec
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Through the 1990s the Intel Indeo codec was very popular, many computer video games and other software utilized it to encode their videos and audio. Indeo seems to be a blend, more precisely a portmanteau, of "Intel Video".
Originally the Indeo codecs were developed by the Intel Architecture Labs since 1992. It was one of the first codecs without a need of hardware acceleration. The version history goes from Intel Indeo version 2 (IR21), 3 (IV31 and IV32), 4 (IV4 and IV41) to 5 (IV50 and IV51). As of June 27, 2000, Ligos Technology acquired the rights to Intel Indeo media software.
Read more about Indeo on Wikipedia.
Ligos Indeo payware
Ligos later provided Indeo video version 5.2 called "Indeo XP for Windows" as payware with the following new features:
- Optimization of the Indeo Video 5 scalability feature
- A wavelet compression algorithm that improves visual quality over previous versions of Indeo
- Better compression at all levels of video quality than previous generation codecs
- Playback performance enhancements including smoother, interpolated "zoom by 2" playback
- Indeo XP also includes the legacy codecs Indeo Video 3.2, Indeo Video 4.5, and Indeo Audio 2.5
- For all Windows OS from Windows 95 to Windows XP
In January 2007 Ligos released a new package called "Ligos Indeo Codecs", which is also payware. It includes Indeo video codec 5.2, Indeo video codec 4.5 and Indeo audio decoder 2.5. Indeo video 3.2 support was dropped and "Indeo XP for Windows" wasn't available anymore.
As of the beginning of 2020, the website of Ligos Corporation went offline and the package "Ligos Indeo Codecs" isn't available anymore. For historic reasons view the website via archive.org: Ligos Indeo Codecs.
Indeo codec on Windows Vista/7/8/8.1/10
On Windows Vista, Windows 7, Windows 8, Windows 8.1(?) and Windows 10(?) the Indeo video codec is integrated but not registered. Open a command prompt ("Start" -> "Run..." -> type "cmd" or "command", click "OK") and execute the following commands.
First change directory (64 bit Windows only)
cd C:\Windows\SysWOW64
Second register the DLL
regsvr32 ir50_32.dll
Now the Indeo video codec is activated and videos based on this codec will be played back. To unregister Indeo just execute the command below. The following error message can be ignored, Indeo will be removed from being active.
regsvr32 /u ir50_32.dll
Indeo codec download
The latest free versions of Indeo 5, also supplied as iv5setup.exe, include Indeo video 3.2, Indeo video 4.5, Indeo video 5.11 and Indeo audio 2.5.
| codec/download | size | date | system |
|---|---|---|---|
| Intel Indeo v5.11 (notes) | 1.72 MiB | 1999/06/18 | Windows 95 Windows 98(SE) Windows ME Windows NT 3.51 Windows NT 4.0 Windows 2000 Windows XP |
| Ligos Indeo v5.11 | 1.77 MiB | (2000/06/26) |
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(published on 2016/06/05, last update on 2020/07/25)