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UID title description helpviewer_keywords old-location tech.root ms.assetid ms.date ms.keywords req.header req.include-header req.target-type req.target-min-winverclnt req.target-min-winversvr req.kmdf-ver req.umdf-ver req.ddi-compliance req.unicode-ansi req.idl req.max-support req.namespace req.assembly req.type-library req.lib req.dll req.irql targetos req.typenames req.redist ms.custom f1_keywords dev_langs topic_type api_type api_location api_name
NF:vfw.ICSeqCompressFrameStart
ICSeqCompressFrameStart function (vfw.h)
The ICSeqCompressFrameStart function initializes resources for compressing a sequence of frames using the ICSeqCompressFrame function.
ICSeqCompressFrameStart
ICSeqCompressFrameStart function [Windows Multimedia]
_win32_ICSeqCompressFrameStart
multimedia.icseqcompressframestart
vfw/ICSeqCompressFrameStart
multimedia\icseqcompressframestart.htm
Multimedia
90103468-fcdc-4c40-b328-29fe467b9039
12/05/2018
ICSeqCompressFrameStart, ICSeqCompressFrameStart function [Windows Multimedia], _win32_ICSeqCompressFrameStart, multimedia.icseqcompressframestart, vfw/ICSeqCompressFrameStart
vfw.h
Windows
Windows 2000 Professional [desktop apps only]
Windows 2000 Server [desktop apps only]
Vfw32.lib
Msvfw32.dll
Windows
19H1
ICSeqCompressFrameStart
vfw/ICSeqCompressFrameStart
c++
APIRef
kbSyntax
DllExport
Msvfw32.dll
ICSeqCompressFrameStart

ICSeqCompressFrameStart function

-description

The ICSeqCompressFrameStart function initializes resources for compressing a sequence of frames using the ICSeqCompressFrame function.

-parameters

-param pc

Pointer to a COMPVARS structure initialized with information for compression.

-param lpbiIn

Format of the data to be compressed.

-returns

Returns TRUE if successful or FALSE otherwise.

-remarks

This function uses a COMPVARS structure to provide settings for the specified compressor and intersperses key frames at the rate specified by the lKey member of COMPVARS. You can specify values for the data rate for the sequence and the key-frame frequency by using the appropriate members of COMPVARS.

Use the ICSeqCompressFrameStart, ICSeqCompressFrame, and ICSeqCompressFrameEnd functions to compress a sequence of frames to a specified data rate and number of key frames.

When finished with compression, use the ICCompressorFree function to release the resources specified in COMPVARS.

COMPVARS needs to be initialized before you use this function. You can initialize the structure manually or you can allow the user to specify a compressor and initialize a COMPVARS structure by using the ICCompressorChoose function.

-see-also

Video Compression Functions

Video Compression Manager