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Indeo 3.2


General Information
Overview
Indeo 3.2 was developed by Intel in the 1980's, and was originally knows as "RealTime Video 2.1" (RT21). Indeo is very similar to the Cinepak codec. It is is well-suited to CD-ROM, has fairly high compression times, and plays back on a wide variety of machines.

Indeo 3.2 is a predeccesor to Intel Video Interactive (IVI), and uses an entirely different compression algorithm.

Architectures Supported
Pros, Cons & Tips
Pros
  • Takes about a third less time to compress video than Cinepak.
  • Indeo is sometimes superior (in terms of quality and image compression) to Cinepak when compressing "talking heads" type video, where most of the background image is static.

Cons
  • No longer supported in QuickTime for Windows 3.
  • Has color artifacting that some producers find objectionable.
  • A known bug prevents Indeo from properly handling content which is taller than it is wide.

Tips
  • The recommended key frame interval for Indeo is 4, regardless of the frame rate.
  • Data rate and quality settings are mutually exclusive -- if you select a fixed data rate, the quality slider is ignored.
  • For playback on QTW, Intel strongly recommends attaching the Indeo video palette to the movie -- it improves 8-bit video quality and playback performance (the Indeo palette is included with the codec release).
  • Trying to decide between Cinepak and Indeo? Here's some more information.


Ideal source material Video
Supported bit depths 16-bit color
Compression time 30% faster than Cinepak
Temporal compression? Yes
Special features -
Encoder requirements Any MacOS or Windows
Decoder requirements Any MacOS or Windows
Encoder availability Freely available from Intel
Decoder availability VfW: built-in
QT2: built into QTW2, seperate (free) install for Mac
QT3: not available for Windows, seperate (free) install for Mac
Algorithm Vector Quantization (VQ)
Manufacturer Intel


If you have any comments or tips & tricks to share about Indeo, please contact us at info@terran-int.com.



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