[gst-devel] Re: problem with the getting the output of goom

[Vincent Torri]

I've solved that problem

Vincent Torri


On Fri, 10 Feb 2006, Vincent Torri wrote:

>
> Hello,
>
> i would like to display the output of the goom element. In the pipeline, I
> have the following elements :
>
> +---------------------------------------------------------------+
> |   +------+   +-------------+                                  |
> |   | tee  |   |             |          pipeline                |
> |   |      +---+  audio sink |                                  |
> |   |      |   |             |                                  |
> |   |      |   +-------------+                                  |
> |   |      |                                                    |
> |   |      |   +----------------------------------------------+ |
> |   |      |   | vis bin                                      | |
> |   |      |   |   +------+   +------+   +-------+   +------+ | |
> |   |      |   |   |      |   |      |   |       |   |      | | |
> |   |      +---+---+ conv +---+ goom +---+ queue +---+ fake | | |
> |   |      |   |   |      |   |      |   |       |   | sink | | |
> |   |      |   |   +------+   +------+   +-------+   +------+ | |
> |   +------+   +----------------------------------------------+ |
> +---------------------------------------------------------------+
>
> I have a tee and an audio sink.
>
> 1) When there is a video stream, the vis bin is not added and the pipeline
> plays the video and audio perfectly.
>
> 2) When there is no video, I add the vis bin, like above: I create a bin
> that I add to the pipeline, I link it to the tee. I connect to the
> fakesink a callback on the handoff signal. The audio plays well, but the
> handoff callback is not called.
>
> Here is the construction of the vis bin :
>
> static GstElement *
> _em_visualisation_sink_create (Emotion_Gstreamer_Video *ev,
> Emotion_Video_Sink *vsink)
> {
>    GstElement         *visbin;
>    GstElement         *conv;
>    GstElement         *vis;
>    GstElement         *queue;
>    GstPad             *pad;
>
>    visbin = gst_bin_new ("visbin");
>
>    conv = gst_element_factory_make ("audioconvert", "aconv");
>    vis = gst_element_factory_make ("goom", "vis");
>    queue = gst_element_factory_make ("queue", NULL);
>    vsink->sink = gst_element_factory_make ("fakesink", NULL);
>    g_object_set (G_OBJECT (vsink->sink), "sync", TRUE, NULL);
>    g_object_set (G_OBJECT (vsink->sink), "signal-handoffs", TRUE, NULL);
>    g_signal_connect (G_OBJECT (vsink->sink),
>                      "handoff",
>                      G_CALLBACK (cb_handoff), ev);
>
>    gst_bin_add_many (GST_BIN (visbin), conv, vis, queue, vsink->sink,
> NULL);
>    gst_element_link_many (conv, vis, queue, vsink->sink, NULL);
>
>    pad = gst_element_get_pad (conv, "sink");
>    gst_element_add_pad (visbin, gst_ghost_pad_new ("sink", pad));
>    gst_object_unref (pad);
>
>   return visbin;
> }
>
> Here is how I add that bin:
>
> {
>   GstElement         *vissink;
>   GstElement         *tee;
>   GstPad             *vispad;
>   GstPad             *teepad;
>
>   vissink = _em_visualisation_sink_create (ev);
>   gst_bin_add (GST_BIN (ev->pipeline), vissink);
>   tee = gst_bin_get_by_name (GST_BIN (ev->pipeline), "tee1");
>
>   vispad = gst_element_get_pad (vissink, "sink");
>   teepad = gst_element_get_request_pad (tee, "src%d");
>   gst_pad_link (teepad, vispad);
>   gst_object_unref (teepad);
>   gst_object_unref (vispad);
>
>   gst_element_set_state (vissink, GST_STATE_PAUSED);
> }
>
> It's not a problem with the audio as the audio stream plays fine. The
> callback is just not called.
>
> I've also tried to not use the vis bin, and add and link directly the
> elements (and set them in the PAUSED state). Same problem.
>
> Maybe it's a stupid thing like an element not linked or not added, but I
> have verified that a lot of times.
>
> Maybe it's a bit deeper and I don't see the problem.
>
> Does someone see a problem with that code ?
>
> thank you
>
> Vincent Torri
>