Это ОГРОМНЫЙ Пакет всевозможных и невозможных кодеков, включая: DivX Pro, DivX ;) MPEG-4 Low and Fast motion, XviD (Koepi's), Microsoft MPEG-4, Fraunhofer MPEG-2 A/V, MP3 audio, DivX WMA Audio, Ogg Vorbis audio, AC3 audio, DivX Anti-Freeze и другие.
Откроются ЛЮБЫЕ форматы видео и аудио!
подробности для асов:

Player:
Media Player Classic [version 6.4.9.0+ SVN build 2006-10-16]

ffdshow:
ffdshow [rev. 486]
extra plugins
ffdshow VFW interface

DirectShow video filters:
XviD [version 1.2.0-dev build 2006-11-02]
DivX [version 6.2.5.34]
CoreAVC [version 0.0.0.4]
On2 VP6 [version 6.4.2.0]
On2 VP7 [version 7.0.10.0]
MPEG-1 / MPEG-2 (Cyberlink) [version 6.0.0.3402]
MPEG-1 / MPEG-2 (InterVideo) [version 7.0.27.191]
MPEG-1 / MPEG-2 (DScaler5) [version 0.0.8.0]
MPEG-1 / MPEG-2 (Gabest) [version 1.0.0.3]
MPEG-1 / MPEG-2 (MainConcept) [version 1.0.0.78]
MPEG-1 / MPEG-2 (Ligos) [version 4.0.0.77]

VFW video codecs:
XviD [version 1.2.0-dev build 2006-04-20]
DivX Pro [version 6.4.0.51]
x264 [rev. 578]
Windows Media 9 VCM [version 9.0.1.369]
On2 VP6 [version 6.4.2.0] [Encoding]
On2 VP7 [version 7.0.10.0] [Encoding]
Intel Indeo [version 5.2562.15.54]
Intel Indeo [version 4.51.16.2]
Intel Indeo [version 3.24.15.03]
Intel I.263 [version 2.55.1.16]
huffyuv [version 2.1.1 CCE Patch 0.2.5]
I420 (Helix) [version 1.2]
YV12 (Helix) [version 1.2]

DirectShow audio filters:
MP3 (Fraunhofer) [version 1.9.0.311]
AC3/DTS/LPCM (AC3Filter) [version 1.11]
AC3/DTS/LPCM (InterVideo) [version 7.0.27.191]
MP1/MP2 (MainConcept) [version 1.0.0.78]
Vorbis (CoreVorbis) [version 1.1.0.79]
AAC (CoreAAC) [version 1.2.0.575]
AAC (3ivX Pro) [version D4 4.5.1]
MusePack [version 1.0.0.3]
Monkey's Audio [version 1.00]
WavPack (CoreWavPack) [version 1.0.3]
FLAC (illiminable) [version 0.73.1936]
Voxware MetaSound [version 1.0.0.12]
AAC encoder (3ivX Pro) [version D4 4.5.1]

ACM audio codecs:
MP3 (Fraunhofer) [version 3.3.2]
MP3 (LAME) [version 3.97]
AC3 (ffcHandler) [version 1.3.1]
Vorbis [version 0.0.3.6]
DivX ;) Audio [version 4.2.0.0]

DirectShow source filters:
MP4 splitter (Haali Media Splitter) [version 1.6.338.23]
MP4 splitter (Gabest) [version 1.0.0.3]
Matroska splitter (Haali Media Splitter) [version 1.6.338.23]
Matroska splitter (Gabest) [version 1.0.2.9]
Ogg splitter (Haali Media Splitter) [version 1.6.338.23]
FLV splitter (Gabest) [version 1.0.0.1]
MPEG-TS splitter (Haali Media Splitter) [version 1.6.338.23]
MPEG demuxer (Cyberlink) [version 1.0.0.4528]
MPEG demuxer (Gabest) [version 1.0.0.3]
MPEG demuxer (MainConcept) [version 1.0.1.20]
MPEG demuxer (Elecard) [version 1.0.31.51211]
MP3 Source (DCoder) [version 1.3]
SHOUTcast Source [version 1.0.0.1]

DirectShow subtitle filter:
DirectVobSub (a.k.a. VSFilter) [version 2.37]
DirectVobSub (a.k.a. VSFilter) [version 2.33]

DirectShow audio filters (general purpose):
Morgan Multimedia Stream Switcher [version 0.9.9]

Encoding tools:
LAME CLI and DLL [version 3.97]
LameDropXPd [version 3.97]
OggDropXPd [version 1.8.9 aoTuVb5]

Tools:
GSpot Codec Information Appliance [version 2.60 beta 3]
Sherlock [version 2.0]
VobSubStrip [version 0.11]
GraphEdit [build 041201]
MMCompView [version 1.10]
AVI Fixed [version 2.0b1]
FourCC Changer
Bitrate Calculator