Fourcc.

Udgivet d. 13/3 - 2002 af Microsoft.
Er hentet på adressen: http://www.microsoft.com/hwdev/devdes/fourcc.htm

FOURCC for Video Compression


Contents:
FOURCCs and DirectDraw
Registered FOURCCs
Registering a FOURCC Code
FOURCC Data Formats

Four-Character Codes (FOURCC), a set of codes that are four characters in length, was introduced by Microsoft to clearly identify video data stream formats. The unique FOURCC value assigned to every compression format and pixel layout allows video frames to be passed between file and codec by ensuring the FOURCC of the source frame matches a FOURCC supported by the codec. FOURCCs describe the software technology that was used to produce multimedia data. By implication, they also describe the format of the data itself.

This article describes how FOURCC is used and provides information about how to register FOURCCs with Microsoft. To register a FOURCC code, send e-mail to mmreg@microsoft.com. Please include your name, title, company name, and phone and fax numbers. For more information, see Registering a FOURCC Code later in this article.

FOURCCs and DirectDraw

Microsoft® DirectDraw® uses FOURCC codes that are stored in file headers of files containing multimedia data such as bitmap images, sound, or video. DirectDraw-based applications use FOURCCs for image color and format conversion. If an application calls the IDirectDrawSurface7::GetPixelFormat method to request the pixel format of a surface whose format is not red-green-blue (RGB), the dwFourCC member of the DDPIXELFORMAT structure identifies the FOURCC when the method returns.

In addition, the biCompression member of the BITMAPINFOHEADER structure can be set to a FOURCC to indicate the codec used to compress or decompress an image. For more information on the use of FOURCCs to this function call, see biHeight and Video Formats in DirectShow.

Registered FOURCCs

FOURCCs are registered with Microsoft by the vendors of the respective multimedia software technologies. The currently registered FOURCCs appear in the following list.

Compressor Code Description
ANIM Intel - RDX
AUR2 AuraVision - Aura 2 Codec - YUV 422
AURA AuraVision - Aura 1 Codec - YUV 411
BT20 Brooktree - MediaStream codec
BTCV Brooktree - Composite Video codec
CC12 Intel - YUV12 codec
CDVC Canopus - DV codec
CHAM Winnov, Inc. - MM_WINNOV_CAVIARA_CHAMPAGNE
CPLA Weitek - 4:2:0 YUV Planar
CVID Supermac - Cinepak
CWLT reserved
DUCK Duck Corp. - TrueMotion 1.0
DVE2 InSoft - DVE-2 Videoconferencing codec
DXT1 reserved
DXT2 reserved
DXT3 reserved
DXT4 reserved
DXT5 reserved
DXTC DirectX Texture Compression
FLJP D-Vision - Field Encoded Motion JPEG With LSI Bitstream Format
GWLT reserved
H260 Intel - Conferencing codec
H261 Intel - Conferencing codec
H262 Intel - Conferencing codec
H263 Intel - Conferencing codec
H264 Intel - Conferencing codec
H265 Intel - Conferencing codec
H266 Intel - Conferencing codec
H267 Intel - Conferencing codec
H268 Intel - Conferencing codec
H269 Intel - Conferencing codec
I263 Intel - I263
I420 Intel - Indeo 4 codec
IAN Intel - RDX
ICLB InSoft - CellB Videoconferencing codec
ILVC Intel - Layered Video
ILVR ITU-T - H.263+ compression standard
IRAW Intel - YUV uncompressed
IV30 Intel - Indeo Video 3 codec
IV31 Intel - Indeo Video 3.1 codec
IV32 Intel - Indeo Video 3 codec
IV33 Intel - Indeo Video 3 codec
IV34 Intel - Indeo Video 3 codec
IV35 Intel - Indeo Video 3 codec
IV36 Intel - Indeo Video 3 codec
IV37 Intel - Indeo Video 3 codec
IV38 Intel - Indeo Video 3 codec
IV39 Intel - Indeo Video 3 codec
IV40 Intel - Indeo Video 4 codec
IV41 Intel - Indeo Video 4 codec
IV42 Intel - Indeo Video 4 codec
IV43 Intel - Indeo Video 4 codec
IV44 Intel - Indeo Video 4 codec
IV45 Intel - Indeo Video 4 codec
IV46 Intel - Indeo Video 4 codec
IV47 Intel - Indeo Video 4 codec
IV48 Intel - Indeo Video 4 codec
IV49 Intel - Indeo Video 4 codec
IV50 Intel - Indeo 5.0
MP42 Microsoft - MPEG-4 Video Codec V2
MPEG Chromatic - MPEG 1 Video I Frame
MRCA FAST Multimedia - Mrcodec
MRLE Microsoft - Run Length Encoding
MSVC Microsoft - Video 1
NTN1 Nogatech - Video Compression 1
qpeq Q-Team - QPEG 1.1 Format video codec
RGBT Computer Concepts - 32 bit support
RT21 Intel - Indeo 2.1 codec
RVX Intel - RDX
SDCC Sun Communications - Digital Camera Codec
SFMC Crystal Net - SFM Codec
SMSC Radius - proprietary
SMSD Radius - proprietary
SPLC Splash Studios - ACM audio codec
SQZ2 Microsoft - VXtreme Video Codec V2
SV10 Sorenson - Video R1
TLMS TeraLogic - Motion Intraframe Codec
TLST TeraLogic - Motion Intraframe Codec
TM20 Duck Corp. - TrueMotion 2.0
TMIC TeraLogic - Motion Intraframe Codec
TMOT Horizons Technology - TrueMotion Video Compression Algorithm
TR20 Duck Corp. - TrueMotion RT 2.0
V422 Vitec Multimedia - 24 bit YUV 4:2:2 format (CCIR 601).
For this format, 2 consecutive pixels are represented by a 32 bit (4 byte) Y1UY2V color value.
V655 Vitec Multimedia - 16 bit YUV 4:2:2 format.
VCR1 ATI - VCR 1.0
VIVO Vivo - H.263 Video Codec
VIXL Miro Computer Products AG - for use with the Miro line of capture cards.
VLV1 Videologic - VLCAP.DRV
WBVC Winbond Electronics - W9960
XLV0 NetXL, Inc. - XL Video Decoder
YC12 Intel - YUV12 codec
YUV8 Winnov, Inc. - MM_WINNOV_CAVIAR_YUV8
YUV9 Intel - YUV9
YUYV Canopus - YUYV compressor
ZPEG Metheus - Video Zipper

The following list shows the FOURCC values for DIB compression.

Compressor Code Description
CYUV Creative Labs, Inc - Creative Labs YUV
FVF1 Iterated Systems, Inc. - Fractal Video Frame
IF09 Intel - Intel Intermediate YUV9
JPEG Microsoft - Still Image JPEG DIB
MJPG Microsoft - Motion JPEG DIB Format
PHMO IBM - Photomotion
ULTI IBM - Ultimotion
VDCT Vitec Multimedia - Video Maker Pro DIB
VIDS Vitec Multimedia - YUV 4:2:2 CCIR 601 for V422
YU92 Intel - YUV

Registering a FOURCC Code

Registering codes with Microsoft prevents needless duplication of work and helps development of standards. To register a FOURCC code, send e-mail to mmreg@microsoft.com. Please include your name, title, company name, and phone and fax numbers.

Use this e-mail address to register the following:

FOURCC Data Formats

Data formats for FOURCC include: RBG, YUV, and compressed formats. RGB describes the colors produced by emitting light, such as on a video monitor. YUV formats can be either packed or planar. In packed YUV formats, Y, U, and V samples are packed together in macropixels and stored in a single array. Planar formats store each component in a separate array and then fuse the three separate planes to create the final image.







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