[gst-devel] Help for dshowaudiosrc

[cammille at polytech.unice.fr]

I would prefer to not recompile dshowaudiosrc if it's possible.
My microphone is not muted. So I don't understand why it didn't work. With
the windows magnetophone I can register my voice. Very strange...

I don't find any information about property probe.. so I don't know how to
use it.

> Hi,
>
> 2 solutions.
>
> ****The first one (user) is to click on volume icone from task bar then
> Options->properties then select "Enregistrement" ("Recording") then select
> microphone then OK then unmute microphone.
>
> ****The second solution (using code), is to recompile dshowaudiosrc using
> this patch:
> http://bugzilla.gnome.org/show_bug.cgi?id=517203  (just see the last post)
>
> Then the following code could be used to list, select and configure the
> input channel of your choise (S/PDIF, lineIn, Mic etc..)
>
> ----------------------------- list audio input ------------------------
> vector<string> listAudioInputs(const string audioDeviceName)
> GstElement* audiodevicesrc = create_element("dshowaudiosrc",
> "audiodevicesrc");
>  g_object_set(G_OBJECT(audiodevicesrc), "device-name",
> audioDeviceName.c_str(), NULL);
>
>  GstPad* pad = gst_element_get_static_pad  (audiodevicesrc, "src");
>  gst_pad_get_caps (pad);
>  if (pad)
>      gst_object_unref(pad);
>
>  vector<string> l_inputs;
>  GstMixer *mixer = GST_MIXER (audiodevicesrc);
> const GList* list = gst_mixer_list_tracks (mixer);
>
>  for (const GList* item = list; item != NULL; item = item->next)
> {
>     GstMixerTrack *track = (GstMixerTrack*)item->data;
>      l_inputs.push_back(string(track->label));
> }
>
>  if (audiodevicesrc)
> {
>      gst_element_set_state (audiodevicesrc, GST_STATE_NULL);
>      gst_object_unref(GST_OBJECT (audiodevicesrc));
> }
>
> return l_inputs;
> }
> ------------------------------------------------------------------------------------------------------
>
> ---------------------------- select record input and set volume
> -------------------------------------
> void setAudioInput(const string audioInput, int volumePercentOfMax)
> {
>   GstMixer *mixer = GST_MIXER (audiodevicesrc);
>   GstMixerTrack *track = NULL;
>   const GList* list = gst_mixer_list_tracks (mixer);
>   for (const GList* item = list; item != NULL; item = item->next)
>    {
>       GstMixerTrack *track_next = (GstMixerTrack*)item->data;
>       if (audioInput == std::string(track_next->label))
>            track = track_next;
>         else
>            //mute other audio inputs
>            gst_mixer_set_mute(mixer, track_next, TRUE);
>    }
> if (track)
> {
>     vector<gint> volumes(m_audioNbChannels, (gint)(volumePercentOfMax *
> track->max_volume / 100.0));
>      gst_mixer_set_record (mixer, track, TRUE);
>      gst_mixer_set_volume (mixer, track, &volumes[0]);
>
>   }
> }
>
> ------------------------------------------------------------------------------------------------------
>
> They are some bad things in this code but the idea is there.
>
> You can also use property probe on dshowaudiosrc to list all the audio
> device names installed on your system.
>
> J.
>
>
> 2009/3/18 <cammille at polytech.unice.fr>
>
>> Hello,
>>
>> I'm trying to use dshowaudiosrc on Windows but I have some problems.
>>
>> For example, I try :
>>
>> gst-launch-0.10.exe dshowaudiosrc ! audioconvert ! vorbisenc ! oggmux !
>> filesink location=foo.ogg
>>
>> And hen I talk in my micro the file foo.ogg is empty.
>> I already verified if my micro functions correctly. It does.
>>
>> If I try :
>> gst-launch-0.10.exe audiotestsrc ! audioconvert ! vorbisenc ! oggmux !
>> filesink location=foo.ogg it works !
>>
>>
>> Where is the problem ?
>>
>>
>>
>>
>>
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> powering Web 2.0 with engaging, cross-platform capabilities. Quickly and
> easily build your RIAs with Flex Builder, the Eclipse(TM)based development
> software that enables intelligent coding and step-through debugging.
> Download the free 60 day trial.
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