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<p>Greetings,</p>
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<p>I have an application where I need to control the output sample rate of an audio resampling filter on the fly, with parts-per-million resolution.</p>
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<p>I've found an example that gets close at:</p>
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<p><a href="https://github.com/andrewrk/libavfilter-example/blob/master/main.c" class="OWAAutoLink" id="LPlnk26204" previewremoved="true">https://github.com/andrewrk/libavfilter-example/blob/master/main.c</a></p>
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<p>I've even managed to convince it to accept arbitrary sample rates with parts-per-million resolution. To be fair, I cannot hear the difference between 64000 samples per second and 64000.000001 samples per second. But I can hear the difference between 64000
samples per second and 40100 samples per second.</p>
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<p><span style="font-size: 12pt;">What I need to figure out is:</span><br>
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<p>- Is it possible to change the resample rate of the aformat filter (lines 61-72) on the fly somewhere in the <span>audio_decode_frame() function?</span></p>
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<p>- Does the aformat filter actually output fractional sample rates, or merely round to the nearest integer rate?</p>
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<p><span></span>- Is there a filter that is better suited to this task?<br>
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<p>Peter.</p>
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