[FFmpeg-user] ffmpeg audio resample filter.

[Daniel Carrasco Marín]

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 any
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?.


Thanks in advance, im sorry for my english, and if somewone knows a good
guide of audio conversions, would be nice to tell me where i can found it
;).