capFileAlloc macro

預先從硬碟配置固定大小的空間存放錄影檔案。

The capFileAlloc macro creates (preallocates) a capture file of a specified size. You can use this macro or explicitly send the WM_CAP_FILE_ALLOCATE message.

BOOL capFileAlloc(
hwnd,
dwSize
);

Parameters

hwnd

Handle to a capture window.

dwSize

Size, in bytes, to create the capture file.

Return Values

Returns TRUE if successful or FALSE otherwise.

If an error occurs and an error callback function is set using the capSetCallbackOnError macro, the error callback function is called.

Remarks

You can improve streaming capture performance significantly by preallocating a capture file large enough to store an entire video clip and by defragmenting the capture file before capturing the clip.