"mix-matrix" is not working at audioconvert

[周甫霖]

Hi all,

I'm trying to play a stereo sound file as a mono sound.

In fact, I'd like to just play only one specific channel such as left or right channel.

I've tried following pipeline structure to achieve:

```

gst-launch-1.0 -v filesrc location=stereo.wav ! wavparse ! audioconvert mix-matrix="<<(float)1.0, (float)0.0>, <(float)1.0, (float)0.0>>" ! audioresample ! autoaudiosink

```

But it seems not work.

The playback-sound heard just like it used to be.

I am wondering if I make some wrong usage?

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[Sebastian Dröge-3]

On Tue, 2019-10-15 at 16:31 +0800, 周甫霖 wrote:

> Hi all,
>
> I'm trying to play a stereo sound file as a mono sound.
>
> In fact, I'd like to just play only one specific channel such as left
> or right channel.
>
> I've tried following pipeline structure to achieve:
>
> ```
> gst-launch-1.0 -v filesrc location=stereo.wav ! wavparse !
> audioconvert mix-matrix="<<(float)1.0, (float)0.0>, <(float)1.0,
> (float)0.0>>" ! audioresample ! autoaudiosink
> ```
>
> But it seems not work.
>
> The playback-sound heard just like it used to be.
>
> I am wondering if I make some wrong usage?

Can you create an issue in gitlab about this? At least the
documentation needs to be improved as that's also how I would
understand how it is supposed to work :)

--
Sebastian Dröge, Centricular Ltd · https://www.centricular.com


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