Why Libav?

[Jellyfrog]

Is there any reason you picked Libav (avconv) over FFmpeg?

[Jellyfrog]

Should probably change brew install ffmpeg to brew install libav also

[manast]

The reason is that I think avcodec is a more active project, with better documentation and more releases. However I think that the dependency on libav can be removed, currently I am only using it to parse the file and read the metadata...

[Jellyfrog]

It gives a rather cryptic error if you install ffmpeg instead of libav

events.js:72
        throw er; // Unhandled 'error' event
              ^
Error: spawn ENOENT
    at errnoException (child_process.js:980:11)
    at Process.ChildProcess._handle.onexit (child_process.js:771:34)

[manast]

that is simply that it did not find the avconv command line tool... I guess I should invest some time in better error reporting :)