Attached is a new port for audio/ffmpeg-normalize [1], which allows one to normalise audio to a given volume level. A common use case is to transform an audio file to a given LUFS level specified by the EBU R128 guidelines [2]. In English, that means that your audio file can be made to sound louder without sounding obnoxiously loud. This automates what otherwise is an extremely cumbersome, manual, two-pass process with FFmpeg, and is the suggested way to automate this process by FFmpeg [3].
ffmpeg-normalize also requires devel/py-tqdm (a Python progress bar), so I've attached a port of that too. Laurie [1] https://github.com/slhck/ffmpeg-normalize [2] https://en.wikipedia.org/wiki/EBU_R_128 [3] https://trac.ffmpeg.org/wiki/AudioVolume
ffmpeg-normalize.tgz
Description: application/tar-gz
py-tqdm.tgz
Description: application/tar-gz