(vision): fix QTPlayer for udp stream on windows
Summary
When making use of QtPlayer to grab and display an udp stream on windows, there is an empty error, and the stream is not displayed. The openCV player can be used as comparison, to check that the stream can be well grabbed. This works fine on linux
Steps to reproduce
On windows only
- Generate an udp video stream
This can be done with ffmpeg and a device
ffmpeg -f dshow -i video="deviceID" -f mpegts udp://127.0.0.1:8585
- Launch ARCalibration and the calibration application
- Choose "stream" and set udp://127.0.0.1:8585
Dev environment
- OS: Windows