Number of spect_bands in spectrum element

[Stefan Sauer]

On 12/16/2011 06:53 PM, victorvictor wrote:
> Hello 
>
> I am using the spectrum element. My pipeline is slowed down a lot (like 2 to
> 10 times slower) when I use some "spect_bands" values and not other :
> for example, with AUDIOFREQ = 44100, spect_bands = 10000 or 1000 works
> perfectly; 5000 makes it very slow, 5010 also, but 5020 doesn't... 7000
> makes it slower, 2000 faster than 5000 but still slower than normal...
> Values that are 44100 divided by a multiple of 2 seem to work...
>
> Is there an optimal number of frequency bands ("spect_bands") tu be used?

Yes, take a look at the GstFFT docs, in particular
gst_fft_next_fast_length().

Stefan

> Thanks 
>
> Victor
>
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