Install FFmpeg avdevice in GitHub CI

Author: jonoomph

.github/workflows/ci.yml

@@ -80,7 +80,7 @@ jobs:
             cmake swig doxygen graphviz curl lcov \
             libasound2-dev \
             qtbase5-dev qtbase5-dev-tools libqt5svg5-dev \
-            libfdk-aac-dev libavcodec-dev libavformat-dev \
+            libfdk-aac-dev libavcodec-dev libavdevice-dev libavformat-dev \
             libavutil-dev libswscale-dev libswresample-dev \
             libzmq3-dev libbabl-dev \
             libopencv-dev libprotobuf-dev protobuf-compiler \