Re: [Discuss-gnuradio] File source woes

[Dan Halperin]

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There is a gr_throttle block that you can use to rate-limit your data. I
think the only rate-limiting going on here is CPU time.

- -Dan

John Bratteli wrote:
> I'm attempting to write a script, based on
> usrp_fft.py, that will read a file of gr_complex and
> display it.  It works, except that it plays back much
> faster than it was recorded.  For example, I recorded
> a five second file and gave it to my script.  It
> looked to be correct data, but it finished playback in
> less than a second.  Here's the essential code:
> 
> self.input = gr.file_source(gr.sizeof_gr_complex,
> options.filename, options.loop)
> 
> adc_freq = 64e6 #inherent to USRP
> decim_rate = float(options.decim) #whatever decimation
> rate used in recording
> 
> input_rate = adc_freq / decim_rate
> 
> self.scope = fftsink.fft_sink_c(self, panel,
> fft_size=1024, sample_rate=input_rate)
> 
> self.connect(self.input, self.scope)
> 
> self._build_gui(vbox)
> 
> *********************************************
> 
> Any help would be greatly appreciated.
> 
> John Bratteli
> 
> 
>  
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