divx5 supports 3point GMC, Thanks to Robert Norberg for the info
xvid supports 3point GMC (since mid july), Thanks to Edouard Gomez for the info
sklmp4 supports trellis quantization, Thanks to Thomas for the info
xvid supports trellis quantization, info from xvid-dev mailinglist
added sklmp4 codec, thanks to skal for the info
new ffmpeg features: rvlc decoding
new xvid features: 1 & 2 warp point GMC de/encoding. Thanks to Christoph Lampert for the info
new ffmpeg features: qpel encoding, chroma Motion estimation, trellis quantization
Added 3ivx D4 PR2. Thanks to Capt. Stux *-Jedi for the info.
Added envivo decoder, xvid decoder supports slices. Thanks to suxen drol for the info.
Added "*" for unverified entries. ffmpeg supports dynamic b frames for encoding now.
Divx5 doesnt seem to support decoding of gmc with more then 1 warp point (it just crashed)
Xvid has GMC support, now
adding text, instead of just colors, so broken browsers like netscape 4.x & lynx display
at least someting
Divx5 does support RVLC decoding. Thanks to Andrea Graziani for the info.
Divx5 does support adaptive quantization (the psychovisual enhancements stuff activates it). Thanks to Eugene Kuznetsov for that info.
| ffmpeg/libavcodec | divx5 | xvid | envivo v1.2.46 | 3ivx D4 PR2 | sklmp4 | |
|---|---|---|---|---|---|---|
| ac/dc prediction | Sup | Sup | Sup | Sup | Sup* | Sup* |
| mpeg quantizer | Sup | Bug, rounding? | Sup | Sup* | Sup* | Sup* |
| B-Vop | Sup | Bug, B before I | Sup | Sup* | Sup* | Sup* |
| 4-MV | Sup | Sup | Sup | Sup* | Sup* | Sup* |
| quarter pel MC | Sup | Bug, 1. chroma rounding 2. 4mv |
Sup* | Sup* | Sup* | Sup* |
| Global MC | Sup | Sup* | Sup* | Sup* | Part, 1 warp point is supported* | Sup* |
| interlacing | Sup | No | Part, only DCT* | No* | No* | Sup* |
| reduced res VOP | No | No* | Sup* | Sup* | No* | Sup* |
| slices | Sup | Sup | Sup* | Sup* | Sup* | Sup* |
| data partitioning | Sup | Sup | No | Unk* | No* | No* |
| reversible vlc | Sup | Sup | No | Unk* | No* | No* |
| ffmpeg/libavcodec | divx5 | xvid | sklmp4 | |
|---|---|---|---|---|
| ac/dc prediction | Sup | Sup | Sup | Sup* |
| mpeg quantizer | Sup | No | Sup | Sup* |
| B-Vop | Sup | Sup | Sup | No* |
| dynamic b frame decision | Sup | No | Sup* | No* |
| 4-MV | Sup | No | Sup | Sup* |
| quarter pel MC | Sup | Bug, chroma rounding | Sup | Sup* |
| Global MC | No | Part, 1 warp point only | Sup* | Sup* |
| interlacing | Part, only DCT | No | Part, only DCT | Sup* |
| reduced res VOP | No | No | Sup* | Sup* |
| slices | Sup | Sup | No | Unk |
| data partitioning | Sup | Sup | No | No* |
| reversible vlc | No | No | No | No* |
| adaptive quantization | Sup | Sup | Sup | Sup* |
| custom quantizer matrixes | No | No | Sup | Sup* |
| Chroma Motion Estimation | Sup | Unk | Sup | Unk |
| Trellis Quantization | Sup | Unk | Sup | Sup* |
| Sup, supported |
Bug, buggy |
Part, partial |
No, not supported |
Unk, unknown |
* not verified by me |
|---|
if u notice ANY errors in the tables then please send me an email. if u dont want the codec of ur company listed here then tell me and ill remove it. patches / additions with codecs listed not here are very welcome too.
Note: i did not do extensive tests with the codecs except ffmpeg so there might be errors
some of the bugs mentioned might be corrected allready, if u do know about one then tell me so i
can fix the table
features which are supported but where it is not known if the support is complete are marked as unknown
for all "buggy/partial" entries the exact reason is mentioned
copyleft 2002-2003 Michael Niedermayer