[轉載]vfw的AVI族函數讀取AVI檔案

#include "vfw.h"

#pragma comment(lib, "vfw32.lib")
#pragma comment(lib, "Winmm.lib")

	AVIFileInit();
	PAVIFILE pAviFile = nullptr;
	// 打開AVI檔案 
	int nRet = AVIFileOpen(&pAviFile, "10.82.27.20_00_201908231542_part0.avi", OF_READ, NULL);

	if (nRet == 0)
	{
		// 讀取AVI檔案的資訊
		AVIFILEINFO aviFileInfo = { 0 };
		AVIFileInfo(pAviFile, &aviFileInfo, sizeof(AVIFILEINFO));

		// 提取出AVI檔案的某種流，此例為視訊流
		PAVISTREAM pAviStrem = nullptr;
		AVIFileGetStream(pAviFile, &pAviStrem, streamtypeVIDEO, 0);

		// 讀取流資訊
		AVISTREAMINFO aviStreamInfo = { 0 };
		AVIStreamInfo(pAviStrem, &aviStreamInfo, sizeof(AVISTREAMINFO));
		/*
		// type 為流格式（音頻或視訊），handler為壓縮方法：如H264
		char handler[4],type[4];
 		handler[0] = stinfo.fccHandler;
 		handler[1] = stinfo.fccHandler >> 8;
		 handler[2] = stinfo.fccHandler >> 16;
		 handler[3] = stinfo.fccHandler >> 24;
 		type[0] = stinfo.fccType;
		type[1] = stinfo.fccType >> 8;
 		type[2] = stinfo.fccType >> 16;
		type[3] = stinfo.fccType >> 24;
		//如果是壓縮的視訊（一般都是壓縮的），打開讀取壓縮桢的函數
		PGETFRAME pGetFrame = AVIStreamGetFrameOpen(pAviStrem, NULL);
		//傳回解壓縮後，圖像的資訊
		LPBITMAPINFOHEADER lpbm = (LPBITMAPINFOHEADER)AVIStreamGetFrame(pGetFrame, 1);
		//讀入并解壓縮視訊的每一幀
		for (int i = 0; i < aviFileInfo.dwLength; i++)
		{
			memcpy(RGBbuf,(BYTE*)AVIStreamGetFrame(pgf,i)+40,pfi.dwWidth*pfi.dwHeight*3);
		}
		//關閉讀取壓縮桢的函數
		AVIStreamGetFrameClose(pGetFrame);*/

		char* szBuf = new char[500 * 1024];
		memset(szBuf, 0, 500 * 1024);

		const int headerSize = sizeof(CMD_HEADER) + sizeof(AV_VIDEO_INFO);
		while (!m_bExit)
		{
			for (int i = 0; i < aviFileInfo.dwLength; i++)
			{
				// 擷取編碼前資料
				AVIStreamRead(pAviStrem, i, 1, szBuf + headerSize, 500 * 1024 - headerSize, NULL, NULL);
			}
		}
		//釋放AVI檔案指針
		AVIFileRelease(pAviFile);
	}

	AVIFileExit();