GstCaps filter issue

doon don-prog at mail.ru
Thu Jul 23 06:42:24 PDT 2015


Thanks for the response!
Yes, oggdemux really need audio/ogg on sink pad. Now I trying to link
audioconvert to autoaudiosink with the same caps and with caps with
"audio/ogg" type but still have same error.
I think I don't quite understand something, can you explain?
I trying to change rate of my audio.
Sérgio Agostinho wrote
> Hi,
> 
> You're setting a caps filter of type audio/x-raw between the filesource
> and
> the typefind element, but the demuxer you selected (oggdemux) does not
> support that on its sink pad.
> 
> What are you trying to do?
> 
> Cheers
> 
> 2015-07-23 2:57 GMT+02:00 doon <

> don-prog@

> >:
> 
>> I trying to create filter using caps:
>> *               GMainLoop *loop;
>>                 GstElement *pipeline, *source, *demuxer, *decoder,
>> *typefind, *conv,
>> *sink;;
>>                 GstBus *bus;
>>                 guint bus_watch_id;
>>
>>
>>                 loop = g_main_loop_new(NULL, FALSE);
>>
>>                 pipeline = gst_pipeline_new ("audio-player");
>>                 source   = gst_element_factory_make ("filesrc",
>>  "file-source");
>>                 typefind = gst_element_factory_make ("typefind",
>> "typefinder");
>>                 demuxer  = gst_element_factory_make ("oggdemux",
>> "ogg-demuxer");
>>                 decoder  = gst_element_factory_make ("vorbisdec",
>>  "vorbis-decoder");
>>                 conv     = gst_element_factory_make ("audioconvert",
>> "converter");
>>                 sink     = gst_element_factory_make ("autoaudiosink",
>> "audio-output");
>>
>>                 if (!pipeline || !source || !demuxer || !decoder || !conv
>> || !sink) {
>>                         g_printerr ("Не удалось создать один из элементов
>> конвейера. Работа
>> приложения завершена.\n");
>>                         return -1;
>>                 }
>>                 g_signal_connect (typefind, "have-type", G_CALLBACK
>> (cb_typefound), loop);
>>                 g_object_set(G_OBJECT(source), "location", name_of_file,
>> NULL);
>>
>>                 bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
>>                 bus_watch_id = gst_bus_add_watch(bus, bus_call, loop);
>>                 gst_object_unref(bus);
>>
>>                 gst_bin_add_many(GST_BIN(pipeline), source, typefind,
>> demuxer, decoder,
>> conv, sink, NULL);
>>
>>                 GstCaps *my_caps = gst_caps_new_simple
>> ("audio/x-raw","rate", G_TYPE_INT,
>> 384,NULL);
>>
>>
>>                 gboolean test=false;
>>                 test = gst_element_link_filtered(source,typefind,
>> my_caps);
>>                 test = gst_element_link(typefind, demuxer);
>>                 test = gst_element_link_many(decoder, conv,sink, NULL);
>>
>>
>>                 g_signal_connect(demuxer, "pad-added",
>> G_CALLBACK(on_pad_added),
>> decoder);*
>>
>> But get error:
>> *Debug: gsttypefindelement.c(1169): gst_type_find_element_loop ():
>> /GstPipeline:a
>> udio-player/GstTypeFindElement:typefinder:
>> stream stopped, reason not-linked*
>>
>> Var test == 1 after gst_element_link_filtered(source,typefind, my_caps);
>>       test == 0 after gst_element_link(typefind, demuxer);
>>       test == 1 after gst_element_link_many(decoder, conv,sink, NULL);
>> If I just change gst_element_link_filtered on gst_element_link all going
>> ok
>> and file plays.
>> What am I doing wrong?
>>
>>
>>
>> --
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