Imports github.com/giorgisio/goav/avformat github.com/giorgisio/goav/swscale github.com/giorgisio/goav/avutil github.com/giorgisio/goav/avcodec github.com/giorgisio/goav/avdevice github.com/giorgisio/goav/avfilter github.com/giorgisio/goav/swresample Standard library imports fmt log os unsafe