[FFmpeg-user] Filter Guru Required - Applying ebur128 filter to stream

[Liam Condron-Farnos]

> There's very little documentation on the ebur128 filter.
>
> It appears the way this works is via two pass processing.
>
> 1) first pass builds normalization data
>
> 2) second pass applies data to audio stream
>
> If there's an example of this somewhere, pass along the link.

http://ffmpeg.org/ffmpeg-all.html#ebur128

'This filter takes an audio stream as input and outputs it unchanged.'

As far as I can tell, it just logs information about the audio,
without changing anything (well... it looks like it can write some
loudness-based metadata to the audio stream). There are some examples
of its usage at the documentation.