Filter Guru Required - Applying ebur128 filter to stream

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Filter Guru Required - Applying ebur128 filter to stream

David Favor
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.

I'm using bleeding edge ffmpeg...

     ffmpeg-1.2.0-2013-05-09-52932-gd1cb559

Thanks.

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Re: 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.
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