Problems with Audio capture in IOS

[aft]

On Sun, Apr 6, 2014 at 6:43 PM, Sebastian Dröge
<sebastian at centricular.com> wrote:
> On So, 2014-04-06 at 17:32 +0600, aft wrote:
>> Hi,
>>
>> I'm trying to capture voice from an IOS device and send it over
>> network using rtpbin. Now When i try to do the same between two
>> desktops (linux/Windows) it works fine. But in case of iOS device the
>> voice is distorted to the point that nothing can be recognized...
>>
>> The code i'm using to capture the voice is :
>>
>> pipeline = gst_pipeline_new (NULL);
>>    g_assert(pipeline);
>>
>>    audiosrc = gst_element_factory_make ("osxaudiosrc", NULL); //ios
>> audio source and mac audio src same?
>>    g_assert (audiosrc);
>>    audioconv = gst_element_factory_make ("audioconvert", NULL);
>>    g_assert (audioconv);
>>    audiores = gst_element_factory_make ("audioresample", NULL);
>>    g_assert (audiores);
>>    /* the encoding and payloading */
>>    audioenc = gst_element_factory_make ("alawenc", NULL);
>>    g_assert (audioenc);
>>    audiopay = gst_element_factory_make ("rtppcmapay", NULL);
>>    g_assert (audiopay);
>>    /* add capture and payloading to the pipeline and link */
>>    gst_bin_add_many (GST_BIN (pipeline), audiosrc, audioconv, audiores,
>>                      audioenc, audiopay, NULL);
>>
>>    if (!gst_element_link_many (audiosrc, audioconv, audiores, audioenc,
>>                                audiopay, NULL)) {
>>        g_error ("Failed to link audiosrc, audioconv, audioresample, "
>>                 "audio encoder and audio payloader");
>>    }
>>
>> I'm feeling i'm doing something wrong when choosing the appropriate
>> element used as "src".
>
> Does it work better if you force a different sample rate after the
> source with a capsfilter (e.g. try 16000, 32000, 44100 and 48000)?
>

Well no luck with different sample rates. The caps i'm using :

GstCaps *rescaps;
   rescaps = gst_caps_new_simple("audio/x-raw", "format",
G_TYPE_STRING, "S32LE",//also tried "S16LE"
                                 "rate", G_TYPE_INT, 48000, //also
tried 44100, 32000, 16000
                                 "channels", G_TYPE_INT, 2, //also tried 1
                                 NULL);
   gst_element_link_filtered (audiosrc, audioenc, rescaps);
   gst_element_link (audioenc, audiopay);


> --
> Sebastian Dröge, Centricular Ltd - http://www.centricular.com
> Expertise, Straight from the Source
>
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>



-- 
-Cheers
-Arif