[gst-devel] Recordind from alsasrc to alsasink

[Guilherme]

Mates, Im using gst-lauch to get the following procedure:

1 - Read from a mic
2 - Save in a Buffer
3 - Playback recorded sound

gst-launch -v alsasrc ! queue ! alsasink

It works pretty well wih audiotestsrc ! alsasink

Could I get some help from you?

Tks!

-------------------

Guilherme Longo
Dept. Eng. da Computac,a~o
Unaerp

Linux User - #484927

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sledge hammer wrote:
> I think your problem is this:
>
> The queues should be between the demuxer and the decoder. I see that 
> you put them between the decoder and the audioconvert(for the audio 
> stream). The pipeline linkage should look like 
> src->demuxer->queuea->decodera->convert->resample->sinka
> src->demuxer->queuev->decoderv->sinkv
>
> > Date: Thu, 23 Apr 2009 08:31:41 -0700
> > From: alavariega at dextratech.com
> > To: gstreamer-devel at lists.sourceforge.net
> > Subject: Re: [gst-devel] play audio and video simultaneously
> >
> >
> > The "mad" element doesn't have dynamic pads, so it doesn't emit a 
> "pad-added"
> > signal. You can connect it directly to "audioconvert".
> >
> > Also I see that you declare "queueV" as a "GstElement**" and not as a
> > "GstElement*".
> >
> >
> > Hi Sledge, thanks for your reply!
> >
> > I have already made the corresponding changes and still not 
> activated the
> > signal that link the video decoder with the respective queue. when i 
> execute
> > the application this is the result:
> >
> > ** (testvideop:6043): DEBUG: Signal: pad-added
> > on_pad_added: audio/mpeg
> > ** (testvideop:6043): DEBUG: Linking audio pad to decodera
> > The audio pad src was linked
> > ** (testvideop:6043): DEBUG: Signal: pad-added
> > on_pad_added: video/mpeg
> > ** (testvideop:6043): DEBUG: Linking video pad to decoderv
> > The video pad src was linked
> >
> > There are no more errors, but they are not playing the video and audio
> > streams simultaneously
> >
> > Thanks in advance for the help,
> >
> > Best Regards,
> >
> > Alberto.
> >
> >
> >
> > #include<gst/gst.h>
> >
> > static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer
> > data);
> > static void on_pad_added (GstElement *element, GstPad *pad);
> > static void on_decpad_added(GstElement *element, GstPad *pad );
> >
> > GstElement *pipeline, *src, *demux, *decoderv, *sinkv, *decodera, 
> *convert,
> > *resample, *sinka;
> > GstElement *queueA, *queueV;
> >
> > int main(int argc, char *argv[])
> > {
> > GstStateChangeReturn ret;
> > GMainLoop *loop;
> > GstBus *bus;
> > /*initialization*/
> > gst_init(&argc,&argv);
> > loop = g_main_loop_new(NULL, FALSE);
> >
> > if(argc != 2)
> > {
> > g_print("Usage: %s <mpg/mpeg video file>", argv[0]);
> > return -1;
> > }
> >
> > pipeline = gst_pipeline_new("VIDEO PLAYER");
> > bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline));
> > gst_bus_add_watch(bus, bus_call, loop);
> >
> > src = gst_element_factory_make("filesrc", "filesource");
> > demux = gst_element_factory_make("dvddemux", "mpg-demux");
> >
> > /*Gstreamer video elements*/
> > decoderv = gst_element_factory_make("mpeg2dec", "mpeg-decoder");
> > sinkv = gst_element_factory_make("xvimagesink", "video-out");
> > if(!decoderv || !sinkv)
> > {
> > g_print("\nthe video could not playback\n");
> > return -1;
> > }
> >
> > /*Gstreamer audio elements*/
> >
> > decodera = gst_element_factory_make("mad", "decoder-audio");
> > convert = gst_element_factory_make("audioconvert", "a-convert");
> > resample = gst_element_factory_make("audioresample", "a-resample");
> > sinka = gst_element_factory_make("osssink", "play audio");
> > if(!decodera || !convert || !resample || !sinka)
> > {
> > g_print("\nthe audio could not playback\n");
> > return -1;
> > }
> >
> > queueA = gst_element_factory_make("queue", "queue-audio");
> > queueV = gst_element_factory_make("queue", "queue-video");
> >
> > g_object_set (G_OBJECT (src), "location", argv[1], NULL);
> > gst_bin_add_many(GST_BIN(pipeline), src, demux, decoderv,
> > queueV,sinkv,decodera,convert, resample, sinka, NULL);
> >
> > gst_element_link (src, demux);
> > gst_element_link (queueV, sinkv);
> > // gst_element_link (queueA, convert);
> > gst_element_link (decodera, convert);
> > gst_element_link (convert, resample);
> > gst_element_link (resample, sinka);
> >
> > g_signal_connect (demux, "pad-added",G_CALLBACK (on_pad_added), NULL);
> > //g_signal_connect (decodera,
> > "pad-added",G_CALLBACK(on_decpad_added),decodera);
> > g_signal_connect (decoderv,
> > "pad-added",G_CALLBACK(on_decpad_added),decoderv);
> >
> > /* run */
> > ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
> >
> > if (ret == GST_STATE_CHANGE_FAILURE)
> > {
> > GstMessage *msg;
> >
> > g_print ("Failed to start up pipeline!\n");
> >
> > /* check if there is an error message with details on the bus */
> > msg = gst_bus_poll (bus, GST_MESSAGE_ERROR, 0);
> > if (msg) {
> > GError *err = NULL;
> > g_print("\nDISPLAY ERROR:\n");
> > gst_message_parse_error (msg, &err, NULL);
> > g_print ("ERROR: %s\n", err->message);
> > g_error_free (err);
> > gst_message_unref (msg);
> > }
> > return -1;
> > }
> >
> > g_main_loop_run (loop);
> >
> > /* clean up */
> > gst_element_set_state (pipeline, GST_STATE_NULL);
> > gst_object_unref (pipeline);
> >
> > return 0;
> >
> > }
> >
> >
> > static gboolean bus_call (GstBus *bus, GstMessage *msg, gpointer
> > data)
> > {
> > GMainLoop *loop = data;
> >
> > switch (GST_MESSAGE_TYPE (msg)) {
> > case GST_MESSAGE_EOS:
> > g_print ("End-of-stream\n");
> > g_main_loop_quit (loop);
> > break;
> > case GST_MESSAGE_ERROR: {
> > gchar *debug = NULL;
> > GError *err = NULL;
> >
> > gst_message_parse_error (msg, &err, &debug);
> >
> > g_print ("Error: %s\n", err->message);
> > g_error_free (err);
> >
> > if (debug) {
> > g_print ("Debug details: %s\n", debug);
> > g_free (debug);
> > }
> >
> > g_main_loop_quit (loop);
> > break;
> > }
> > default:
> > break;
> > }
> >
> > return TRUE;
> > }
> >
> >
> > static void on_decpad_added(GstElement *element, GstPad *pad )
> > {
> > g_debug ("Signal: decoder pad-added");
> > GstCaps *caps;
> > GstStructure *str;
> > GstPad *targetsink;
> > caps = gst_pad_get_caps (pad);
> > g_assert (caps != NULL);
> > str = gst_caps_get_structure (caps, 0);
> > g_assert (str != NULL);
> >
> > g_debug ("Linking decoder to QUEUE pad ");
> > // Link it actually
> > //element = (element == decodera ? queueA : queueV);
> > targetsink = gst_element_get_pad ( queueV, "sink");
> > g_assert (targetsink != NULL);
> > gst_pad_link (pad, targetsink);
> > if (gst_pad_is_linked(pad))
> > g_print("The decoder pad src was linked\n");
> > else
> > g_print("The stream:%s pad src was
> > linked\n",gst_pad_get_name(pad));
> > gst_object_unref (targetsink);
> > gst_caps_unref (caps);
> > }
> >
> > static void on_pad_added (GstElement *element, GstPad *pad)
> > {
> > g_debug ("Signal: pad-added");
> > GstCaps *caps;
> > GstStructure *str;
> >
> > caps = gst_pad_get_caps (pad);
> > g_assert (caps != NULL);
> > str = gst_caps_get_structure (caps, 0);
> > g_assert (str != NULL);
> >
> > const gchar *c = gst_structure_get_name(str);
> > g_print("on_pad_added: %s\n",c);
> > if (g_strrstr (c, "video") || g_strrstr (c, "image")) {
> > g_debug ("Linking video pad to decoderv");
> > // Link it actually
> > GstPad *targetsink = gst_element_get_pad (decoderv, "sink");
> > g_assert (targetsink != NULL);
> > //g_print("\nVIDEO--pad source: %s\n",
> > gst_pad_get_name(pad));
> > //g_print("\nVIDEO--pad sink: %s\n",
> > gst_pad_get_name(targetsink));
> > gst_pad_link (pad, targetsink);
> > if (gst_pad_is_linked(pad))
> > g_print("The video pad src was linked\n");
> > gst_object_unref (targetsink);
> > }
> >
> > if (g_strrstr (c, "audio")) {
> > g_debug ("Linking audio pad to decodera");
> > // Link it actually
> > GstPad *targetsink = gst_element_get_pad (decodera, "sink");
> > g_assert (targetsink != NULL);
> > //g_print("\nAUDIO--pad source: %s\n",
> > gst_pad_get_name(pad));
> > //g_print("\nAUDIO--pad sink: %s\n",
> > gst_pad_get_name(targetsink));
> > gst_pad_link (pad, targetsink);
> > if (gst_pad_is_linked(pad))
> > g_print("The audio pad src was linked\n");
> > gst_object_unref (targetsink);
> > }
> >
> > gst_caps_unref (caps);
> > }
> >
> >
> >
> >
> > --
> > View this message in context: 
> http://www.nabble.com/play-audio-and-video-simultaneously-tp23175849p23197413.html
> > Sent from the GStreamer-devel mailing list archive at Nabble.com.
> >
> >
> > 
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