audiomixer gaps

[Matthew Waters]

Don't use 'do-timestamp=true' with audiotestsrc.  It will not do the 
right thing.

Cheers
-Matt

On 8/12/20 5:12 pm, jim nualart wrote:
> Hi,
> Hoping that someone can shed some light on this...
>
> The following pipeline results in a file with gaps every 5 seconds:
> export TESTSOURCE1="audiotestsrc wave=0 volume=0.8 is-live=true 
> do-timestamp=true samplesperbuffer=480"
> export SINK="wavenc ! filesink location=test.wav"
> timeout 60 gst-launch-1.0 $TESTSOURCE1 ! audiomixer ! $SINK
>
> If you open the resulting wav file (e.g., in audacity), there are gaps 
> every 5 seconds.
>
> If you remove the audiomixer from the pipeline, there are no gaps. If 
> you use an adder (instead of the audiomixer), there are no gaps.
>
> I've looked at logs (GST_DEBUG=audiomixer:6), and there are no obvious 
> errors/warnings/etc.
>
> I realize that the audiotestsrc is not really a live-source and I'm 
> not sure how well it behaves as such. But I am actually 
> troubleshooting a similar issue using an alsasrc instead. I am hoping 
> that if I understand what's going on here, it will help on the other 
> issue. (For the issue with the alsasrc, I've gone so far as to write 
> the data to files; one at the src of the element feeding the 
> audiomixer, and one at the src of the audiomixer itself -- the first 
> shows no gaps, while the later does show gaps.)
>
> Many thanks in advance to any advice.
> -jim
>
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