lib log fix

zhangmeng

2019-09-27 0c98249d381d6e56c78d6e752a49e768a4c4d22e

 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})
   {}