[Libav-user] Synchronising audio to system clock

[drwho]

One of the audio hifi streaming devices used to drop or insert samples.  
In newer versions they fine tune the audio pll to match the stream 
rate.  Beware Sonos has a patent on the behavior you just described.  
What is your application?

On 2021-10-12 10:35 a.m., Simon Brown wrote:
> Hi,
> I'm using the ffmpeg decode engine to receive opus encoded audio over 
> IP and push it into my buffer which connects to my audio driver 
> (custom firmware, not a PC).  The audio driver expects audio at 48kHz 
> and plays it at 48kHz locked to its system clock rate.  However, the 
> audio coming in is from a different system, so is at 48kHz+/-delta 
> relative to my system clock rate.
>
> How do PCs cope with this sample rate difference?  Can FFMpeg be 
> trained to a system clock rate, so that it can resample the audio at 
> the 'correct' rate?  The final problem I have is that I want latency 
> to be minimal.
>
> Any suggestions welcome.
>
> Thanks,
> Simon
>
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