Microsoft MPEG-4: Difference between revisions
Jump to navigation
Jump to search
m (add link to j-frame) |
m (add fourcc 'MP42') |
||
| Line 1: | Line 1: | ||
* FourCCs: MP43, DIV3, WMV7, WMV8, AP41, COL1 | * FourCCs: MP42, MP43, DIV3, WMV7, WMV8, AP41, COL1 | ||
* Company: [[Microsoft]] | * Company: [[Microsoft]] | ||
* Technical Description: http://svn.mplayerhq.hu/michael/trunk/docs/msmpeg4.txt?view=co | * Technical Description: http://svn.mplayerhq.hu/michael/trunk/docs/msmpeg4.txt?view=co | ||
Revision as of 01:16, 4 October 2007
- FourCCs: MP42, MP43, DIV3, WMV7, WMV8, AP41, COL1
- Company: Microsoft
- Technical Description: http://svn.mplayerhq.hu/michael/trunk/docs/msmpeg4.txt?view=co
- Samples:
- AngelPotion variation: http://samples.mplayerhq.hu/V-codecs/AP41/
- COL1: http://samples.mplayerhq.hu/V-codecs/COL1/
- MP43: http://samples.mplayerhq.hu/V-codecs/MP43/
- WMV1/7: http://samples.mplayerhq.hu/V-codecs/WMV1/
- WMV2/8: http://samples.mplayerhq.hu/V-codecs/WMV8/
The Microsoft MPEG-4 codecs are similar to the ISO MPEG-4 coding standard but with various modifications to specifics such as Huffman tables and prediction methods. These are the different codecs covered under the umbrella of Microsoft's version of MPEG-4:
- Microsoft MPEG-4 version 1
- Microsoft MPEG-4 version 2
- Microsoft MPEG-4 version 3
- Microsoft Windows Media Video v1/v7 (WMV7)
- Microsoft Windows Media Video v2/v8 (WMV2/WMV8)
The full line of Microsoft MPEG-4 codecs is supported by FFmpeg with one current caveat: WMV8 support is missing one coding mode sometimes referred to as J-type frames, an alternate type of I-frames in the coding scheme.