[gst-devel] gstbin test...

[thiagoss]

On Mon, Dec 29, 2008 at 2:51 PM, Yool-Je Cho <revizes at yahoo.co.kr> wrote:

> Hello...
>
> I tested gstbin..
>
> gst-launch-0.10 audiotestsrc ! queue ! audioconvert ! { vorbisenc ! oggmux
> } ! filesink location=audio.ogg
> is successed...
>
> but...below is
> Error: Internal data flow error. (gstbasesrc.c(2234): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstAudioTestSrc:audiotestsrc0:
> streaming task paused, reason not-linked (-1))
>
>
>
> static GstElement *make_encoder (void)
> {
>     GstElement *result;
>     GstElement *codec;
>     GstElement *mux;
>     GstPad *pad;
>     GstCaps *caps;
>
>     /* create result bin */
>     result = gst_bin_new(NULL);
>     g_assert(result);
>
>     /* create elements */
>     codec = gst_element_factory_make("vorbisenc", NULL);
>     g_assert(codec);
>
>     mux = gst_element_factory_make("oggmux", NULL);
>     g_assert(mux);
>
>     /* add elements to result bin */
>     gst_bin_add(GST_BIN(result), codec);
>     gst_bin_add(GST_BIN(result), mux);
>
>     /* link elements */
>     gst_element_link_pads(codec, "src", mux, "sink");
>

You should have tested the result of this call, it is failing because 'mux'
has no pad named 'sink'. oggmux uses 'request pads', read the docs about it
and you'll see how to fix this.


>     /* ghost src and sink pads */
>     pad = gst_element_get_static_pad(codec, "sink");
>     gst_element_add_pad(result, gst_ghost_pad_new("sink", pad));
>     gst_object_unref(pad);
>
>     pad = gst_element_get_static_pad(mux, "src");
>     gst_element_add_pad(result, gst_ghost_pad_new("src", pad));
>     gst_object_unref(pad);
>
>     return result;
> }
>
>
> static GstElement *make_pipeline(void)
> {
>     GstElement *result;
>     GstElement *audiosrc;
>     GstElement *queue;
>     GstElement *aconv;
>     GstElement *sink;
>     GstElement *encoder;
>
>     result = gst_pipeline_new(NULL);
>     g_assert(result);
>
>     /* create various elements */
>     audiosrc = gst_element_factory_make("audiotestsrc", NULL);
>     g_assert(audiosrc);
>
>     queue = gst_element_factory_make("queue", NULL);
>     g_assert(queue);
>
>     aconv = gst_element_factory_make("audioconvert", NULL);
>     g_assert(aconv);
>
>
>     sink = gst_element_factory_make("filesink", NULL);
>     g_object_set(sink, "location", "audio.ogg", NULL);
>     g_assert(sink);
>
>     /* add elements */
>     gst_bin_add(GST_BIN(result), audiosrc);
>     gst_bin_add(GST_BIN(result), queue);
>     gst_bin_add(GST_BIN(result), aconv);
>     gst_bin_add(GST_BIN(result), sink);
>
>     encoder = make_encoder();
>
>     gst_bin_add(GST_BIN(result), encoder);
>
>     /* link elements */
>     gst_element_link_pads(audiosrc, "src", queue, "sink");
>     gst_element_link_pads(queue, "src", aconv, "sink");
>     gst_element_link_pads(aconv, "src", encoder, "sink");
>     gst_element_link_pads(encoder, "src", sink, "sink");
>
>     gst_element_set_state(result, GST_STATE_READY);
>
>     return result;
> }
>
>
> Where is incorrect?
>
> Thanks..
>
>
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>
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-- 
Thiago Sousa Santos

Embedded Systems and Pervasive Computing Lab (Embedded)
Center of Electrical Engineering and Informatics (CEEI)
Federal University of Campina Grande (UFCG)
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