我是openCV的新手,最近获得了openCV 2.4.7的预编译版本,并成功地将其与visual studio 2010集成.
显然库似乎工作正常,但当我尝试使用imshow显示图像时,它显示窗口但不显示图像.
{
cv::Mat image = cv::imread("F:/office_Renzym/test3.jpg",CV_LOAD_IMAGE_UNCHANGED);
if(image.empty())
{
cout<<"image not loaded";
}
else
{
cv::namedWindow( "test", CV_WINDOW_AUTOSIZE );
cv::imshow("test",image);
}
}
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我正在尝试实现Instagram视频裁剪功能.为此,我需要获得正确的视频方向,我将以MPMoviePlayerController正确的宽高比布局我的视图,然后用户将能够平移视频并显示方形视频将在动作中被裁剪.
我在获取正确的视频方向时遇到问题.我正在使用以下代码
AVURLAsset *asset = [AVURLAsset URLAssetWithURL:fileUrl options:nil];
NSArray *tracks = [asset tracksWithMediaType:AVMediaTypeVideo];
AVAssetTrack *track = [tracks objectAtIndex:0];
UIInterfaceOrientation orientation =[self orientationForTrack:track];
// method to get orientation
- (UIInterfaceOrientation)orientationForTrack:(AVAssetTrack *)videoTrack
{
CGSize size = [videoTrack naturalSize];
CGAffineTransform txf = [videoTrack preferredTransform];
if (size.width == txf.tx && size.height == txf.ty)
return UIInterfaceOrientationLandscapeRight;
else if (txf.tx == 0 && txf.ty == 0)
return UIInterfaceOrientationLandscapeLeft;
else if (txf.tx == 0 && txf.ty == size.width)
return UIInterfaceOrientationPortraitUpsideDown;
else
return UIInterfaceOrientationUnknown; …Run Code Online (Sandbox Code Playgroud) video objective-c mpmovieplayercontroller uiinterfaceorientation ios