录像方向设置

-(AVCaptureConnection *)connectionWithMediaType:(NSString *)mediaType fromConnections:(NSArray *)connections

{

    for ( AVCaptureConnection *connectionin connections ) {

        for ( AVCaptureInputPort *portin [connection inputPorts] ) {

            if ( [[port mediaType]isEqual:mediaType] ) {

                return connection;

            }

        }

    }

    return nil;

}

AVCaptureConnection *videoConnection = [ self connectionWithMediaType:AVMediaTypeVideofromConnections:[output connections]];

        if ([videoConnection isVideoOrientationSupported])

            [videoConnection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];