[gst-devel] Bug in osxaudiosrc? (Mac OS 10.5.5)

[Eric Zhang]

Hi, gstreamer-devel:

    Actually, I don't get what your problem is. Maybe this is because a
language limitation. if you wanna use osxaudiosink, add converter or any
other filter elements into your pipeline, otherwise the not-negotiation
error occurs. This is the sample pipeline from osxaudiosink's manual:

gst-launch -v filesrc location=sine.ogg ! oggdemux ! vorbisdec !
audioconvert ! audioresample ! osxaudiosink

    I think your can read gstreamer developer guide and maybe you will
figure out the answer yourself while reading it.

Eric Zhang


2008/11/11 Sjoerd Op 't Land <sjoerd at intercue.nl>

> Hello all,
>
> I am new to gstreamer, so please forgive me if the errors encountered
> are due to my inexperience. I am running Mac OS 10.5.5 on a MacBook
> Core 2 Duo and I compiled gstreamer, gst-plugins-base and gst-plugins-
> good from cvs (0.10.21.1).
>
> To start off, I wanted to create an audio loopthrough. First, I tried
> to get the output to work. With a little modification, I was able to
> produce a sine:
>
>  > gst-launch audiotestsrc ! audioconvert ! audio/x-raw-
> float,channels=2,width=32,depth=32 ! osxaudiosink
>
> (My first attempt failed, I don't know whether this is expected
> behaviour:
>  > gst-launch audiotestsrc ! osxaudiosink
> Setting pipeline to PAUSED ...
> Pipeline is PREROLLING ...
> ERROR: from element /GstPipeline:pipeline0/
> GstAudioTestSrc:audiotestsrc0: Internal data flow error.
> Additional debug info:
> gstbasesrc.c(2292): gst_base_src_loop (): /GstPipeline:pipeline0/
> GstAudioTestSrc:audiotestsrc0:
> streaming task paused, reason not-negotiated (-4)
> ERROR: pipeline doesn't want to preroll.
> Setting pipeline to NULL ...
> FREEING pipeline ...)
>
> The reason I am mailing you, is that I can't seem to get osxaudiosrc
> to function, tried various stream types and convert/resample options.
> The command line suggested in the source code unfortunately does not
> function:
>
>  > gst-launch -v -m osxaudiosrc ! fakesink
> Setting pipeline to PAUSED ...
> ERROR: Pipeline doesn't want to pause.
> Got Message from element "fakesink0" (state-changed): GstMessageState,
> old-state=(GstState)GST_STATE_NULL, new-
> state=(GstState)GST_STATE_READY, pending-
> state=(GstState)GST_STATE_VOID_PENDING;
> Got Message from element "osxaudiosrc0" (state-changed):
> GstMessageState, old-state=(GstState)GST_STATE_NULL, new-
> state=(GstState)GST_STATE_READY, pending-
> state=(GstState)GST_STATE_VOID_PENDING;
> Got Message from element "pipeline0" (state-changed): GstMessageState,
> old-state=(GstState)GST_STATE_NULL, new-
> state=(GstState)GST_STATE_READY, pending-
> state=(GstState)GST_STATE_PAUSED;
> Got Message from element "osxaudiosrc0" (error): GstMessageError,
> gerror=(GstGError)(NULL), debug=(string)"gstbasesrc.c\(2484\):\
> gst_base_src_start\ \(\):\ /GstPipeline:pipeline0/
> GstOsxAudioSrc:osxaudiosrc0:\012Check\ your\ filtered\ caps\,\ if\ any";
> ERROR: from element /GstPipeline:pipeline0/
> GstOsxAudioSrc:osxaudiosrc0: Could not negotiate format
> Additional debug info:
> gstbasesrc.c(2484): gst_base_src_start (): /GstPipeline:pipeline0/
> GstOsxAudioSrc:osxaudiosrc0:
> Check your filtered caps, if any
> Setting pipeline to NULL ...
> FREEING pipeline ...
>
> Thanks in advance for any suggestions. Again, I apologise beforehand
> if this is an error of mine, due to my inexperience with GStreamer.
>
> Best regards,
> Sjoerd Op 't Land
>
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