Weird issues with audiomixer

[Michael Krog]

Hi.

I am trying hard to understand what I am doing wrong using the audiomixer element. 

I am using gstreamer 1.8.1 on Mac OS and I am trying to mix two audiostreams.

This basic pipeline works:

gst-launch-1.0 autoaudiosrc ! audiomixer ! autoaudiosink

This also works fine:

gst-launch-1.0 filesrc location=song2.mp3 ! mad ! audiomixer ! autoaudiosink

Now I want to mix those 2 together via the audiomixer like this:

gst-launch-1.0 filesrc location=song2.mp3 ! mad ! queue ! audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 ! audiomixer name=mix ! autoaudiosink autoaudiosrc ! queue ! audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 ! mix.

But it results in this:

PAUSERER rørledning ...

Rørledningen kører, og behøver ikke at blive PREROLL'ed ...

Rørledning sættes til AFSPIL ...

New clock: GstSystemClock

FEJL: fra element /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0: Intern datastrømsfejl.

Yderligere fejlsøgningsinformation:

gstbasesrc.c(2948): void gst_base_src_loop(GstPad *) (): /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0:

streaming task paused, reason not-negotiated (-4)

Execution ended after 0:00:00.036197000

PAUSERER rørledning ...

Rørledning sættes til KLAR ...

Rørledning sættes til NUL ...

Rørledning frigøres ...

I can make it work however, by simply adding wavenc and wavparse to the autoaudiosrc like this:

gst-launch-1.0 filesrc location=song2.mp3 ! mad ! queue ! audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 ! audiomixer name=mix ! autoaudiosink autoaudiosrc ! queue ! wavenc ! wavparse ! audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 ! mix. 

But why do I need to do that?

Thanx in advance!

- Michael

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[Sebastian Dröge-3]

On Mo, 2016-06-27 at 14:08 +0200, Michael Krog wrote:
> 
> Now I want to mix those 2 together via the audiomixer like this:
> gst-launch-1.0 filesrc location=song2.mp3 ! mad ! queue !
> audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 !
> audiomixer name=mix ! autoaudiosink autoaudiosrc ! queue !
> audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 ! mix.

There is no depth field in raw audio caps in 1.x. Use something like
  format=S16LE
or similar instead.

--

Sebastian Dröge, Centricular Ltd · http://www.centricular.com
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[Michael Krog]

Awesome! It works.

Thanks!

> Den 27. jun. 2016 kl. 14.24 skrev Sebastian Dröge <[hidden email]>:
>
> On Mo, 2016-06-27 at 14:08 +0200, Michael Krog wrote:
>>  
>> Now I want to mix those 2 together via the audiomixer like this:
>> gst-launch-1.0 filesrc location=song2.mp3 ! mad ! queue !
>> audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 !
>> audiomixer name=mix ! autoaudiosink autoaudiosrc ! queue !
>> audioconvert ! audio/x-raw,channels=2,rate=44100,depth=16 ! mix.
>
> There is no depth field in raw audio caps in 1.x. Use something like
>   format=S16LE
> or similar instead.
>
> --
>
> Sebastian Dröge, Centricular Ltd · http://www.centricular.com_______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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