AVI - Windows Audio-Video Interleaved RIFF
[File Formats]
Detailed Description
- Windows Copyright Microsoft Corporation.
- Access to the AVI format uses Windows AVIFile library. Available in Windows Only.
When writing a new file you must use an ".avi" extension, or the Windows API will fail.
You must link the application with "im_avi.lib" and you must call the function imFormatRegisterAVI once to register the format into the IM core library.
Depends also on the VFW library (vfw32.lib). When using the "im_avi.dll" this extra library is not necessary.
If using Cygwin or MingW must link with "-lvfw32". Old versions of Cygwin and MingW use the "-lvfw_ms32" and "-lvfw_avi32".
- See im_format_avi.h
Data Types: Byte
Color Spaces: RGB, MAP and Binary (Gray saved as MAP)
Compressions (installed in Windows XP by default):
NONE - no compression [default]
RLE - Microsoft RLE (8bpp only)
CINEPACK - Cinepak Codec by Radius
MSVC - Microsoft Video 1 (old)
M261 - Microsoft H.261 Video Codec
M263 - Microsoft H.263 Video Codec
I420 - Intel 4:2:0 Video Codec (same as M263)
IV32 - Intel Indeo Video Codec 3.2 (old)
IV41 - Intel Indeo Video Codec 4.5 (old)
IV50 - Intel Indeo Video 5.1
IYUV - Intel IYUV Codec
MPG4 - Microsoft MPEG-4 Video Codec V1 (not MPEG-4 compliant) (old)
MP42 - Microsoft MPEG-4 Video Codec V2 (not MPEG-4 compliant)
CUSTOM - (show compression dialog)
DIVX - DivX 5.0.4 Codec (DivX must be installed)
(others, must be the 4 charaters of the fourfcc code)
Can have more than one image.
Can have an alpha channel (only for RGB)
Internally the components are always packed.
Lines arranged from top down to bottom or bottom up to top. But are saved always as bottom up.
Handle(0) returns NULL. imBinFile is not supported.
Handle(1) returns PAVIFILE.
Handle(2) returns PAVISTREAM.
Attributes:
FPS IM_FLOAT (1) (should set when writing, default 15)
AVIQuality IM_INT (1) [1-10000, default -1] (write only)
KeyFrameRate IM_INT (1) (write only) [key frame frequency, if 0 not using key frames, default 15]
DataRate IM_INT (1) (write only) [kilobits/second, default 2400]
Comments:
Reads only the first video stream. Other streams are ignored.
All the images have the same size, you must call imFileReadImageInfo/imFileWriteImageInfo
at least once.
For codecs comparsion and download go to:
http://graphics.lcs.mit.edu/~tbuehler/video/codecs/
http://www.fourcc.org
Function Documentation
| void imFormatRegisterAVI |
( |
void |
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) |
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