[gst-devel] Sound recording

[Andreas Volz]

Am Sat, 30 Dec 2006 17:22:02 +0100 schrieb René Stadler:

> Am Samstag, den 30.12.2006, 16:52 +0100 schrieb Andreas Volz:
> > Am Sat, 30 Dec 2006 16:28:05 +0100 schrieb René Stadler:
> > 
> > > Am Samstag, den 30.12.2006, 14:06 +0100 schrieb Andreas Volz:
> > > > Am Fri, 29 Dec 2006 10:38:42 -0600 schrieb keith preston:
> > > > 
> > > > > >
> > > > > >
> > > > > >
> > > > > > Is there an example code that shows how to record sound
> > > > > > files?
> > > > > 
> > > > > 
> > > > > gst-launch-0.10 alsasrc ! wavenc ! filesink location=temp.wav
> > > > > 
> > > > > Look at some of the gstreamer documentation for how to write
> > > > > the app that makes this pipeline and suitably control this the
> > > > > pipeline. The above command should record wavs.   Mp3 and ogg
> > > > > are not much different.
> > > > 
> > > > Thanks, the command worked. But if I like to create a C
> > > > application that realizes this pipe I get this warning at start
> > > > time:
> > > > 
> > > > (ogg_player:19889): GStreamer-WARNING **: Trying to connect
> > > > elements that don't share a common ancestor: alsasrc-source and
> > > > wavenc-enc
> > > > 
> > > > Some code points:
> > > > 
> > > >   pipeline = gst_pipeline_new ("audio-player");
> > > >   source = gst_element_factory_make ("alsasrc",
> > > > "alsasrc-source"); enc = gst_element_factory_make ("wavenc",
> > > > "wavenc-enc"); sink = gst_element_factory_make ("filesink",
> > > > "filesink-sink"); ...
> > > >   gst_element_link (source, enc);
> > > >   gst_element_link (enc, sink);
> > > > 
> > > > So where is the problem?
> > > > 
> > > > regards
> > > > Andreas
> > > 
> > > You probably forgot adding one of the elements to the pipeline.
> > 
> > I added it to the pipeline, but I added also an uninitialized
> > element to the pipeline. After removing the element it works great. 
> > 
> > Thanks
> > Andreas
> > 
> 
> Out of curiosity, what do you mean by "*uninitialized* element"?

I added a GstElement *conv; with gst_bin_add_many (GST_BIN (pipeline)...
to a Bin without a conv=gst_element_factory_make(...) call before. I
didn't even set conv to NULL.

regards
Andreas