[FFmpeg-user] ffmpeg audio resample filter.

Timothy Gu timothygu99 at gmail.com
Sat May 18 19:17:57 CEST 2013

On May 18, 2013 2:09 AM, "Daniel Carrasco Marín" <danielmadrid19 at gmail.com>
> Hi friends,
> I've found this command line to get higher quality conversion between
> samplerates and i want to know if someone can help me to understand how
> works and what is every option:
> -af aresample=osr=44100:filter_size=256:cutoff=1
> I've tried to found some about filter_size in google and i've not found
> interesting thing... I've found that -cutoff is for set bandwidth of audio
> but i always know that, i want to know how works: for example, what happen
> if i change cutoff=1 to cutoff=0.7 or cutoff=1.5, and how it affects to
> final audio quality. I want the same with filter_size, what happen if i
> change it to 200 or 300, and what osr mean in this command line?.

Did you read the documentation?


for the filter and


for the options meaning.

Timothy G.

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