[gst-devel] Recordind from alsasrc to filesink
Guilherme
grlongo.ireland at gmail.com
Sun Apr 26 15:06:27 CEST 2009
Also trying:
gst-launch alsasrc ! audioconvert ! level ! audioconvert ! flacenc !
filesink location=my_file.mp3
does create the file but no snd is recorded.
;o(
Tks!
-------------------
Guilherme Longo
Dept. Eng. da Computac,a~o
Unaerp
Linux User - #484927
*Before Asking
http://www.istf.com.br/?page=perguntas
!- I'd rather die on my feet than live on my knees -!
Guilherme wrote:
> 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
>
> *Before Asking
> http://www.istf.com.br/?page=perguntas
>
> !- I'd rather die on my feet than live on my knees -!
>
>
>
> 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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