[FFmpeg-devel] [PATCH v3] doc/filters: Add double-pass example for loudnorm

[Gyan Doshi]

On 22-08-2018 04:43 AM, Marvin Scholz wrote:

>>
>>> + at example
>>> +ffmpeg -i input -af 
>>> loudnorm=I=-23:TP=-1:measured_I=-9.0:measured_TP=1.5:measured_LRA=9.4:measured_thresh=-19.5:print_format=summary 
>>> output
>>
>> Since your input LRA is 9.4, and output LRA is 7 (default), the filter 
>> will upsample to 192 kHz. You should resample afterwards.
>>
> 
> Ok, whats the correct way to do that?

e.g.

     ffmpeg -i input -af loudnorm=...,aresample=48000 output

Ideally, loudnorm should call a resampler internally, but for now, this 
is what we can do.

Thanks,
Gyan