trouble on build qeframework3.4.3 on windows7 64bit

[anantianshi]

Hi, all:
Recently I started to buit the epicsqt using this set(Windows 7 | MSVC 14.0, 64 bit | EPICS_HOST_ARCH=windows-x64 | EPICS3.14.12.3 | QWT-6.1.3 | QT-5.7.0 |EPICSQT- 3.4.3),I built the qwt sucessfully，the qt-designer can find the qwt widget. I used the qtcreator,qmake,jom.exe to build the qeframework and gui sucessfully and generated a qeplugin.dll and qeplugin.lib,I copied them to some directory just like the qwt,but the qt designer widgets box can not display.I do not konw why. also when buit the qegui, the qegui.exe can not work correctly,always say run out of avutil-56.dll. I do not set QE_FFMPEG at all. Any can help me solve the two problems and tell me how to build the epicsqt (qeframework and qegui) correctly? Thank you!