从摄像头得到视频流，从中任意选取5帧

代码说明：

  从摄像头得到视频流，从中任意选取5帧，保存成图像文件 2.从AVI文件读取视频，从中任意选取5帧，保存成图像文件 3.从摄像头得到视频流，在指定的窗口内实时显示该视频 4. 读取一jpg文件，对其旋转、缩放，然后显示出来 (Get a video stream a camera, which arbitrarily selected five, save it as an image file 2. Read the video AVI files, arbitrarily selected five, save it as an image file 3. To obtain a video stream the camera, displayed in real time within the specified window the video 4. read a jpg file, its rotation, scaling, and then displayed)

文件列表：

Debug
.....\testOpenCV.exe,102400,2016-09-18
.....\testOpenCV.ilk,596284,2016-09-18
.....\testOpenCV.pdb,2124800,2016-09-18
Release
.......\testOpenCV.exe,23552,2016-11-01
.......\testOpenCV.pdb,1207296,2016-11-01
testOpenCV
..........\Debug
..........\.....\CL.read.1.tlog,43702,2016-09-18
..........\.....\CL.write.1.tlog,922,2016-09-18
..........\.....\link-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link-rc.read.1.tlog,2,2016-09-18
..........\.....\link-rc.write.1.tlog,2,2016-09-18
..........\.....\link.2000-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.2000-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.2000-rc.read.1.tlog,2,2016-09-18
..........\.....\link.2000-rc.write.1.tlog,2,2016-09-18
..........\.....\link.2000.read.1.tlog,2,2016-09-18
..........\.....\link.2000.write.1.tlog,2,2016-09-18
..........\.....\link.2352-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.2352-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.2352-rc.read.1.tlog,2,2016-09-18
..........\.....\link.2352-rc.write.1.tlog,2,2016-09-18
..........\.....\link.2352.read.1.tlog,2,2016-09-18
..........\.....\link.2352.write.1.tlog,2,2016-09-18
..........\.....\link.3668-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.3668-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.3668-rc.read.1.tlog,2,2016-09-18
..........\.....\link.3668-rc.write.1.tlog,2,2016-09-18
..........\.....\link.3668.read.1.tlog,2,2016-09-18
..........\.....\link.3668.write.1.tlog,2,2016-09-18
..........\.....\link.3904-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.3904-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.3904-rc.read.1.tlog,2,2016-09-18
..........\.....\link.3904-rc.write.1.tlog,2,2016-09-18
..........\.....\link.3904.read.1.tlog,2,2016-09-18
..........\.....\link.3904.write.1.tlog,2,2016-09-18
..........\.....\link.7616-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.7616-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.7616-rc.read.1.tlog,2,2016-09-18
..........\.....\link.7616-rc.write.1.tlog,2,2016-09-18
..........\.....\link.7616.read.1.tlog,2,2016-09-18
..........\.....\link.7616.write.1.tlog,2,2016-09-18
..........\.....\link.7644-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.7644-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.7644-rc.read.1.tlog,2,2016-09-18
..........\.....\link.7644-rc.write.1.tlog,2,2016-09-18
..........\.....\link.7644.read.1.tlog,2,2016-09-18
..........\.....\link.7644.write.1.tlog,2,2016-09-18
..........\.....\link.7824-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.7824-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.7824-rc.read.1.tlog,2,2016-09-18
..........\.....\link.7824-rc.write.1.tlog,2,2016-09-18
..........\.....\link.7824.read.1.tlog,2,2016-09-18
..........\.....\link.7824.write.1.tlog,2,2016-09-18
..........\.....\link.788-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.788-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.788-rc.read.1.tlog,2,2016-09-18
..........\.....\link.788-rc.write.1.tlog,2,2016-09-18
..........\.....\link.788.read.1.tlog,2,2016-09-18
..........\.....\link.788.write.1.tlog,2,2016-09-18
..........\.....\link.7968-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.7968-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.7968-rc.read.1.tlog,2,2016-09-18
..........\.....\link.7968-rc.write.1.tlog,2,2016-09-18
..........\.....\link.7968.read.1.tlog,2,2016-09-18
..........\.....\link.7968.write.1.tlog,2,2016-09-18
..........\.....\link.8100-cvtres.read.1.tlog,2,2016-09-18
..........\.....\link.8100-cvtres.write.1.tlog,2,2016-09-18
..........\.....\link.8100-rc.read.1.tlog,2,2016-09-18
..........\.....\link.8100-rc.write.1.tlog,2,2016-09-18
..........\.....\link.8100.read.1.tlog,2,2016-09-18
..........\.....\link.8100.write.1.tlog,2,2016-09-18
..........\.....\link.read.1.tlog,16026,2016-09-18
..........\.....\link.write.1.tlog,1214,2016-09-18
..........\.....\testOpenCV.lastbuildstate,103,2016-09-18
..........\.....\testOpenCV.log,2506,2016-09-18
..........\.....\vc110.idb,1256448,2016-09-18
..........\.....\vc110.pdb,1699840,2016-09-18
..........\.....\Դ.obj,396532,2016-09-18
..........\Release
..........\.......\CL.read.1.tlog,94208,2016-11-01
..........\.......\CL.write.1.tlog,350,2016-11-01
..........\.......\link-cvtres.read.1.tlog,2,2016-11-01
..........\.......\link-cvtres.write.1.tlog,2,2016-11-01
..........\.......\link-rc.read.1.tlog,2,2016-11-01
..........\.......\link-rc.write.1.tlog,2,2016-11-01
..........\.......\link.read.1.tlog,8008,2016-11-01
..........\.......\link.write.1.tlog,350,2016-11-01
..........\.......\testOpenCV.lastbuildstate,92,2016-11-01
..........\.......\testOpenCV.log,2451,2016-11-01
..........\.......\vc110.pdb,1134592,2016-11-01
..........\.......\Դ.obj,2056516,2016-11-01
..........\testOpenCV.vcxproj,3578,2016-09-18
..........\testOpenCV.vcxproj.filters,941,2016-09-18
..........\testOpenCV.vcxproj.user,164,2016-09-18
..........\Դ.cpp,6314,2016-11-01
testOpenCV.sdf,39845888,2016-11-01