How can I slove problem in build qgc with gstreamer

(QGroundControl.exe:17348): GStreamer-WARNING **: 14:38:23.850: Failed to load plugin ‘E:/program/newversionQGC/build-qgroundcontrol-Desktop_Qt_5_12_6_MSVC2017_64bit-Release/staging/gstreamer-plugins\gstclosedcaption.dll’: ‘E:/program/newversionQGC/build-qgroundcontrol-Desktop_Qt_5_12_6_MSVC2017_64bit-Release/staging/gstreamer-plugins\gstclosedcaption.dll’: 鎵句笉鍒版寚瀹氱殑妯″潡銆

(QGroundControl.exe:17348): GStreamer-WARNING **: 14:38:24.891: Failed to load plugin ‘E:/program/newversionQGC/build-qgroundcontrol-Desktop_Qt_5_12_6_MSVC2017_64bit-Release/staging/gstreamer-plugins\gstdecklink.dll’: ‘E:/program/newversionQGC/build-qgroundcontrol-Desktop_Qt_5_12_6_MSVC2017_64bit-Release/staging/gstreamer-plugins\gstdecklink.dll’: 鎵句笉鍒版寚瀹氱殑妯″潡銆
and so on…
this problem may because of “/” and “”,but i don’t know how to slove it.

i think the ploblem happend in here,qt and gstreamer have different definitions in dll address("//“and”\")