System information (version)

• OpenCV => latest(master)
• Operating System / Platform => Windows 10 Creators 64 Bit
• Compiler => Visual Studio 2015 64

Detailed description

I have an rtsp server which crashes after prolonged TCP connection. I have no way of avoiding this device, and I don't have control to fix the crash. UDP is needed. However, after bug "fix" http://code.opencv.org/issues/2235#note-18 ffmpeg capture is hardcoded to TCP.

Steps to reproduce

Normal opening of RTSP stream using cv::VideoCapture

this->Capture = std::make_shared<cv::VideoCapture>(this->VideoURL, this->RequestedCaptureAPI);
this->Capture->read(*this->Frame)