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