How do I avoid "not negotiated error"?

[S Boucher]

I get the following error:
GStreamer Error: gstbasetransform.c(1918): gst_base_transform_handle_buffer (): /GstPipeline:player/GstBin:mbaudiosink/GstAudioConvert:audioconvert:
not negotiated

I have a pipeline which uses decoderbin. This means that buffers are pushed in the pipeline while the pipeline is not yet fully linked.

How am I supposed to know when it is ok for the source's pad task to push data in order to avoid negotiation errors?

I do set the caps of the src pad of my source element.

I'm using autoaudiosink as the sink of the pipeline.  If I switch to pulsesink, then the problem does not seem occur, but given that this is an intermittent problem, it's not clear that I'm actually fixing anything by going to pulsesink.



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[Tim-Philipp Müller-2]

On Wed, 2010-02-24 at 12:23 -0800, S Boucher wrote:

> I have a pipeline which uses decodebin.

"A pipeline"? If you could provide details about the whole pipeline,
that would be helpful.

> I'm using autoaudiosink as the sink of the pipeline.  If I switch to
>  pulsesink, then the problem does not seem occur, but given that this
>  is an intermittent problem, it's not clear that I'm actually fixing
>  anything by going to pulsesink.

Maybe you're missing an audioresample element in addition to the
audioconvert?

Cheers
 -Tim



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[S Boucher]

--- On Wed, 2/24/10, Tim-Philipp Müller <[hidden email]> wrote:

> > I have a pipeline which uses decodebin.
>
> "A pipeline"? If you could provide details about the whole
> pipeline,
> that would be helpful.

homemadesrc->decodebin->audioconvert->audioresample->volume->audiopanorama->autoaudiosink

> > I'm using autoaudiosink as the sink of the
> pipeline.  If I switch to
> >  pulsesink, then the problem does not seem occur,
> but given that this
> >  is an intermittent problem, it's not clear that
> I'm actually fixing
> >  anything by going to pulsesink.
>
> Maybe you're missing an audioresample element in addition
> to the
> audioconvert?

The problem is intermittent, not systematic.



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