ICCompressorChoose

The ICCompressorChoose function displays a dialog box in which a user can select a compressor. This function can display all registered compressors or list only the compressors that support a specific format.

BOOL ICCompressorChoose(
  HWND hwnd,      
  UINT uiFlags,   
  LPVOID pvIn,    
  LPVOID lpData,  
  PCOMPVARS pc,   
  LPSTR lpszTitle 
);
 

Parameters

hwnd

Handle of a parent window for the dialog box.

uiFlags

Applicable flags. The following values are defined:

ICMF_CHOOSE_ALLCOMPRESSORS

All compressors should appear in the selection list. If this flag is not specified, only the compressors that can handle the input format appear in the selection list.

ICMF_CHOOSE_DATARATE

Displays a check box and edit box to enter the data rate for the movie.

ICMF_CHOOSE_KEYFRAME

Displays a check box and edit box to enter the frequency of key frames.

ICMF_CHOOSE_PREVIEW

Displays a button to expand the dialog box to include a preview window. The preview window shows how frames of your movie will appear when compressed with the current settings.

pvIn

Uncompressed data input format. Only compressors that support the specified data input format are included in the compressor list. This parameter is optional.

lpData

Address of an AVI stream interface to use in the preview window. You must specify a video stream. This parameter is optional.

pc

Address of a COMPVARS structure. The information returned initializes the structure for use with other functions.

lpszTitle

Address of a null-terminated string containing a title for the dialog box. This parameter is optional.

Return Values

Returns TRUE if the user chooses a compressor and presses OK. Returns FALSE on error or if the user presses CANCEL.

Remarks

Before using this function, set the cbSize member of the COMPVARS structure to the size of the structure. Initialize the rest of the structure to zeros unless you want to specify some valid defaults for the dialog box. If specifying defaults, set the dwFlags member to ICMF_COMPVARS_VALID and initialize the other members of the structure. For more information about initializing the structure, see the ICSeqCompressFrameStart function and COMPVARS.

QuickInfo

  Windows NT: Requires version 3.1 or later.
  Windows: Requires Windows 95 or later.
  Windows CE: Unsupported.
  Header: Declared in vfw.h.
  Import Library: Use vfw32.lib.

See Also

Video Compression Manager Overview, Video Compression Functions, COMPVARS, ICSeqCompressFrameStart