A Comparison Of Codecs: Divx Vs. WMV9 Vs. MPEG-2
The software used in testing the different codecs: Tmpg Encoder from Pegasys. Our test video is available in 16:9 format - the specification of 720x576 pixels (4:3) is incorrect.
A summary comparison of different video compression formats: at an extremely low data rate of 250 kBit/s, Divx 6 and 5.2.1 are unbeatable. The WMV9 codec exhibits obvious blurring. All DVD movies still use MPEG-2, a codec that is outdated and has big problems at lower data rates.
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| Video Format | File Type | Bit RateImage & Sound | Minimum bit ratefor good quality | Memory needed for60 min. of film | Standalone DVD playerplayback possible | Video quality | Dolby DigitalAudio |
|---|---|---|---|---|---|---|---|
| DV | AVI | 29000 kBit/s | 29000 kBit/s | 12700 MB | no | excellent | no |
| Divx 5.x | AVI | 10 bis 16000 kBit/s | 1500 kBit/s | 660 MB | yes | excellent | yes |
| XviD | AVI | 10 bis 16000 kBit/s | 1500 kBit/s | 660 MB | yes | good | yes |
| MPEG-1 | MPG | 1374 kBit/s | 1374 kBit/s | 600 MB | no | very poor | yes |
| MPEG-2 | VOB | 1200 bis 9800 kBit/s | 6000 kBit/s | 2600 MB | yes | excellent | yes |
| Quicktime | MOV | 10 bis 32000 kBit/s | 1700 kBit/s | 750 MB | no | satisfactory to good | no |
| Windows Media | WMV | 4 bis 20000 kBit/s | 2000 kBit/s | 880 MB | no | good | no |
Overview and evaluation of the most important video formats.
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