[gst-devel] Playing Mp3 help
basavaraj P
basavarajp82 at gmail.com
Thu Nov 19 15:15:40 CET 2009
Hello Katcipis,
Thanks for this.
It worked for me.
Thanks,
Basavaraj
On Thu, Nov 19, 2009 at 7:30 PM, Tiago Katcipis <katcipis at inf.ufsc.br>wrote:
> Basavaraj,
> seeing your on_pad_added function it sens that you never connect the
> decoder on the convert, and never connect the convert on the sink. The
> following is missing after you connect the signal:
>
> *
> /* we link the elements together */
> /* file-source -> mp3-demuxer ~> mp3-decoder -> converter -> alsa-output
> */
> gst_element_link (source, demuxer);
> g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added),
> decoder);
> **gst_element_link (decoder, conv);
> gst_element_link (conv**, sink);*
>
>
> hope this helps you
>
> best regards,
> Katcipis
>
>
> On Thu, Nov 19, 2009 at 11:40 AM, basavaraj P <basavarajp82 at gmail.com>wrote:
>
>>
>> Hello Katcipis,
>>
>> Following is the on_pad_added function.
>>
>> *static void
>> on_pad_added (GstElement *element,
>> GstPad *pad,
>> gpointer data)
>> {
>> GstPad *sinkpad;
>> GstElement *decoder = (GstElement *) data;
>>
>> /* We can now link this pad with the mp3-decoder sink pad */
>> g_print ("Dynamic pad created, linking demuxer/decoder\n");
>>
>> sinkpad = gst_element_get_static_pad (decoder, "sink");
>>
>> gst_pad_link (pad, sinkpad);
>>
>> gst_object_unref (sinkpad);
>> }
>> *
>>
>> Thanks,
>> Basavaraj
>>
>>
>>
>>
>> On Thu, Nov 19, 2009 at 3:11 PM, Tiago Katcipis <katcipis at inf.ufsc.br>wrote:
>>
>>> It would be easier if you show your on_pad_added function, and if you
>>> tell exactly what error messages do you get when you run your application.
>>>
>>> To investigate the capabilities of a element you can use gst-inspect.
>>>
>>> On a terminal you can type for example:
>>> gst-inspect flump3dec
>>>
>>> it will give an complete specification of the flump3dec element.
>>>
>>> best regards,
>>> Katcipis
>>>
>>> On Thu, Nov 19, 2009 at 6:40 AM, basavaraj P <basavarajp82 at gmail.com>wrote:
>>>
>>>> Hello,
>>>>
>>>> Following is code which plays mp3 using playbin
>>>>
>>>> * /* set up */
>>>> play = gst_element_factory_make ("playbin2", "play");
>>>> g_object_set (G_OBJECT (play), "uri",
>>>> "file:///home/basavaraj/Music/JabSeTereNaina.mp3", NULL);
>>>>
>>>> bus = gst_pipeline_get_bus (GST_PIPELINE (play));
>>>> // gst_bus_add_watch (bus, my_bus_callback, loop);
>>>> gst_object_unref (bus);
>>>>
>>>> gst_element_set_state (play, GST_STATE_PLAYING);
>>>> *
>>>>
>>>> Following is code which does not play mp3. Please help me what all
>>>> plugins we need to connect and
>>>> how to find their capabilities
>>>>
>>>> * /* Create gstreamer elements */
>>>> GstElement* pipeline = gst_pipeline_new ("audio-player");
>>>> GstElement* source = gst_element_factory_make ("filesrc",
>>>> "file-source");
>>>> GstElement* demuxer = gst_element_factory_make ("mpegdemux2",
>>>> "mpeg-demuxer");
>>>> GstElement* decoder = gst_element_factory_make ("flump3dec",
>>>> "fluendo-decoder");
>>>> // GstElement* decoder = gst_element_factory_make("decodebin",
>>>> "decoderbin");
>>>> GstElement* conv = gst_element_factory_make ("audioconvert",
>>>> "converter");
>>>> GstElement* sink = gst_element_factory_make ("autoaudiosink",
>>>> "audio-output");
>>>>
>>>> if (!pipeline || !source || !demuxer || !decoder || !conv || !sink) {
>>>> g_printerr ("One element could not be created. Exiting.\n");
>>>> return -1;
>>>> }
>>>>
>>>> /* Set up the pipeline */
>>>>
>>>> /* we set the input filename to the source element */
>>>> // g_object_set (G_OBJECT (source), "uri",
>>>> "file:///home/basavaraj/Music/Jab.mp3", NULL);
>>>> g_object_set (G_OBJECT (source), "location",
>>>> "/home/basavaraj/Music/Jab.mp3", NULL);
>>>>
>>>> /* we add a message handler */
>>>> GstBus *bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
>>>> gst_bus_add_watch (bus, bus_call, loop);
>>>> gst_object_unref (bus);
>>>>
>>>> /* we add all elements into the pipeline */
>>>> /* file-source | mp3-demuxer | mp3-decoder | converter | alsa-output
>>>> */
>>>> gst_bin_add_many (GST_BIN (pipeline),
>>>> source, demuxer, decoder, conv, sink, NULL);
>>>>
>>>> /* we link the elements together */
>>>> /* file-source -> mp3-demuxer ~> mp3-decoder -> converter ->
>>>> alsa-output */
>>>> gst_element_link (source, demuxer);
>>>> g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added),
>>>> decoder);
>>>>
>>>> /* Set the pipeline to "playing" state*/
>>>> g_print ("Now playing: %s\n", argv[1]);
>>>> gst_element_set_state (pipeline, GST_STATE_PLAYING);
>>>> *
>>>>
>>>> Thanks in advance,
>>>> Basavaraj
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>
>>>
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>
>
> --
> "Se você se perder na selva africana, não precisa se desesperar. Basta
> sentar em uma pedra e começar a instalar GNU/Linux em seu laptop. Em menos
> de 5 minutos aparecerá alguém pra discordar de sua escolha de distribuição,
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> editor de textos..."
>
>
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