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ICSeqCompressFrame
The ICSeqCompressFrame function compresses one frame in a sequence of frames.
LPVOID ICSeqCompressFrame(
PCOMPVARS pc,
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| UINT uiFlags,
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| LPVOID lpBits,
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| BOOL * pfKey,
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| LONG * plSize
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| );
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Parameters
pc
Address of a COMPVARS structure initialized with information about the compression.
uiFlags
Reserved; must be zero.
lpBits
Address of the data bits to compress. (The data bits exclude header or format
information.)
pfKey
Returns whether or not the frame was compressed into a key frame.
plSize
Maximum size desired for the compressed image. The compressor might not be
able to compress the data to fit within this size. When the function returns, the
parameter points to the size of the compressed image. Images sizes are
specified in bytes.
Return Values
Returns the address of the compressed bits if successful or NULL 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 ICSeqCompressorFrameStart function. You can specify values for the data rate for the sequence and the
key-frame frequency by using the appropriate members of COMPVARS.
Use this function instead of the ICCompress function to compress a video sequence.
You can allow the user to specify a compressor and initialize a COMPVARS structure by using the ICCompressorChoose function. Or, you can initialize a COMPVARS structure manually.
Use the ICSeqCompressFrameStart, ICSeqCompressFrame, and ICSeqCompressFrameEnd functions to compress a sequence of frames to a specified data rate and
number of key frames. Use ICSeqCompressFrame once for each frame to be compressed.
When finished with compression, use the ICCompressorFree function to release the resources specified by COMPVARS.
See Also
COMPVARS, ICCompress, ICCompressorChoose, ICSeqCompressFrameStart, ICSeqCompressFrameEnd, ICCompressorFree
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