bug fixed gb mem leak

zhangmeng

2019-10-28 f2fb5eb58ae50bb35f2d0ae2673a596adc06cb00

 csrc/ffmpeg/property/VideoProp.cpp

@@ -17,6 +17,7 @@
   ,udp_port_x_(5000)
   ,udp_port_y_(65000)
    ,gpu_acc_(true)
   ,gpu_index_(-1)
    ,sample_aspect_ratio_(AVRational{0,1})
   {}