I try to deploy a mac app using macdeployqt. It used to work like a charm but since I use homebrew to get my libs, the deploy doesn't works, throwing a lot (+) of lines like that: ERROR: ". Sep 14, · We all love custom boot sounds do we not? The boot sound on our CF, or PC saber often defines the personality of said weapon. extract the contents to a folder called "FFmpeg_v_for_Audacity_on_OSX" anywhere on your computer, then follow the instructions below to locate libavformatdylib in the Libraries Preferences. The libavformat library provides a generic framework for multiplexing and demultiplexing (muxing and demuxing) audio, video and subtitle streams. It encompasses multiple muxers and demuxers for multimedia container formats. It also supports several input and output protocols to access a media resource. 2 See Also.