gst_mpeg_audio_parse_head_check:<mpegaudioparse1> invalid samplerate: 0x3 - WARN during audio crossfading
Rossana Guerra
guerra.rossana at gmail.com
Tue Nov 15 22:14:03 PST 2011
Hi I did a crossfading code, it works almost fine, at the begining of the
second audio clip two little dry noises appear.
The applications runs for avi files.
During the crossfade I do linear interpolation of volume property.
Running the code with GST_DEBUG = 2, this is the warn for the second clip:
c:471:gst_mpeg_audio_parse_head_check:<mpegaudioparse1> invalid samplerate:
0x3
Is the noise related to this warn?
Thanks
Rossana
Here's the core of the code:
GstElement * getBin(const gchar * nomBin, GstElement * &v1, GstElement
*&v2, GstElement * &aconv1, GstElement * &aconv2, GstElement * &mixer)
{
GstElement * bin = gst_bin_new(nomBin);
if (!bin)
{
g_printerr ("No se pudo crear el bin. Saliendo\n");
return NULL;
}
v1 = gst_element_factory_make ("volume","vol1");
v2 = gst_element_factory_make ("volume","vol2");
aconv1 = gst_element_factory_make ("audioconvert","aconv1");
aconv2 = gst_element_factory_make ("audioconvert","aconv2");
mixer = gst_element_factory_make("adder", "mixer");
if ((!v1) || (!v2) || (!aconv1) || (!aconv2) || (!mixer))
{
g_printerr ("Alguno de los elementos del Bin no pudo ser creado.
Saliendo\n");
return NULL;
}
// Anexamos al bin
gst_bin_add_many(GST_BIN (bin),v1,v2,aconv1,aconv2,mixer, NULL);
gst_element_link (aconv1,v1);
gst_element_link (aconv2,v2);
/* Now link volume outs to adder ins, on request */
GstPad *pad = 0;
pad = gst_element_get_request_pad(mixer, "sink%d");
g_assert(pad != NULL);
gst_pad_link(gst_element_get_pad(v1,"src"), pad);
pad = gst_element_get_request_pad (mixer, "sink%d");
g_assert(pad != NULL);
gst_pad_link(gst_element_get_pad(v2, "src"), pad);
return bin;
}
void getAndSetController(GstElement * volumen2, gdouble duracion)
{
GstController * ctrl = NULL;
if (!(ctrl = gst_controller_new (G_OBJECT (volumen2), "volume",NULL))) {
cout << "No creo controlador.." << endl;
GST_WARNING ("No puede controlar el elemento fuente\n");
return;
}
// Todo valor GValue debe inicializarse en 0
GValue val_double = { 0, };
g_value_init (&val_double, G_TYPE_DOUBLE);
// Creo la fuente al controlador y la asocio al controlador
// Seteo modo de interpolacion
GstInterpolationControlSource * csource =
gst_interpolation_control_source_new();
gst_controller_set_control_source (ctrl, "volume", GST_CONTROL_SOURCE
(csource));
gst_interpolation_control_source_set_interpolation_mode(csource,GST_INTERPOLATE_LINEAR);
// Seteo primer valor
g_value_set_double(&val_double, 0.0);
gst_interpolation_control_source_set(csource,(0 *
GST_MSECOND),&val_double);
// Seteo segundo valor
g_value_set_double (&val_double, 1.0);
gst_interpolation_control_source_set(csource,(duracion *
GST_MSECOND),&val_double);
g_object_unref (csource);
}
void addGhostPadsToBin(GstElement *aconv1, GstElement * aconv2, GstElement
* mixer, GstElement* bin)
{
/* add ghostpad */
GstPad * pad1 = gst_element_get_static_pad (aconv1, "sink");
gst_element_add_pad(bin, gst_ghost_pad_new("alfasink1", pad1));
gst_object_unref (GST_OBJECT (pad1));
GstPad * pad2 = gst_element_get_static_pad (aconv2, "sink");
gst_element_add_pad(bin, gst_ghost_pad_new("alfasink2", pad2));
gst_object_unref(GST_OBJECT(pad2));
GstPad * pad3 = gst_element_get_static_pad (mixer, "src");
gst_element_add_pad(bin, gst_ghost_pad_new("mixersrc", pad3));
gst_object_unref(GST_OBJECT(pad3));
}
void crossTransicion(gdouble duracion, GstElement * & bin,gint transicion =
1)
{
// devuelve el bin
GstElement * volumen1, *volumen2, *aconv1,*aconv2,*mixer;
volumen1 = 0;
volumen2 = 0;
aconv1 = 0;
aconv2 = 0;
mixer = 0;
bin = getBin("bin",volumen1, volumen2,aconv1,aconv2,mixer); // Crea el
bin y los elementos
getAndSetController(volumen2,duracion);
addGhostPadsToBin(aconv1, aconv2, mixer, bin);
}
GstElement * getSetPipeline(gchar *argv[])
{
gint dur1 = 9000; // duration (in ms) to play of first clip
gint dur2 = 8000; // duration (in ms) to play of second clip
gint dur_crossfade = 500; //number of milliseconds to crossfade for
GstElement *comp = 0;
GstElement *pipeline, *audio1, *audio2, *op, *bin, *queue, *sink;
// ejecuta 2 clips serialmente con un crosdfade entre ellos usando el
elemento (GnlOlin) gnlcomposition
if ((comp = gst_element_factory_make("gnlcomposition",
"micomposicion")) == NULL)
{
printf ("\n Fallo al crear gnlcomposition \n");
return NULL;
}
GstCaps *caps =
gst_caps_from_string("audio/x-raw-int;audio/x-raw-float");
// Create our composition
g_object_set(G_OBJECT(comp), "caps", caps, NULL);
op = gst_element_factory_make("gnloperation", "op");
crossTransicion(dur_crossfade, bin,1);
if (gst_bin_add (GST_BIN (op), bin) == FALSE)
{
printf ("\n No pudo agregar el bin a la gnloperacion op \n");
return NULL;
}
g_object_set (op,"start", (dur1-dur_crossfade) * GST_MSECOND,NULL);
g_object_set (op,"duration", dur_crossfade * GST_MSECOND,NULL);
g_object_set (op,"media-start", 0 * GST_MSECOND,NULL);
g_object_set(op,"media-duration", dur_crossfade * GST_MSECOND,NULL);
g_object_set(op,"priority",0,NULL);
if (gst_bin_add (GST_BIN (comp), op) == FALSE)
{
printf ("\n No pudo agregar la gnloperacion a la gnlcomposition \n");
return NULL;
}
// configura primer clip
if ((audio1 = gst_element_factory_make("gnlfilesource", "audio1")) ==
NULL)
{
printf ("\n Falló la creacion del gnlfilesource \n");
return NULL;
}
if (gst_bin_add (GST_BIN (comp), audio1) == FALSE)
{
printf ("\n No pudo agregar audio1 a comp \n");
return NULL;
}
g_object_set (audio1, "location", argv[1], NULL);
g_object_set(audio1, "uri", argv[1],NULL);
g_object_set (audio1, "start", 0 * GST_MSECOND, NULL);
g_object_set (audio1, "duration", dur1 * GST_MSECOND, NULL);
g_object_set (audio1, "media-start", 0* GST_MSECOND, NULL);
g_object_set (audio1, "media-duration", dur1 * GST_MSECOND, NULL);
g_object_set (audio1, "priority", 1,NULL);
// crea 2º clip
if ((audio2 = gst_element_factory_make("gnlfilesource", "audio2")) ==
NULL)
{
printf ("\n Falló la creacion del gnlfilesource \n");
return NULL;
}
if (gst_bin_add (GST_BIN (comp), audio2) == FALSE)
{
printf ("\n No pudo agregar audio2 a comp \n");
return NULL;
}
g_object_set (audio2, "location", argv[2], NULL);
g_object_set (audio2,"uri",argv[2],NULL);
g_object_set (audio2, "start", (dur1-dur_crossfade) * GST_MSECOND,
NULL);
g_object_set (audio2, "duration", dur2 * GST_MSECOND, NULL);
g_object_set (audio2, "media-start", 0 * GST_MSECOND, NULL);
g_object_set (audio2, "media-duration", dur2 * GST_MSECOND, NULL);
g_object_set (audio2, "priority", 2,NULL);
// setup the backend viewer
queue = gst_element_factory_make("queue", "queue");
sink = gst_element_factory_make("autoaudiosink", "sink");
pipeline = gst_pipeline_new ("audio-player");
/* Agrego elementos al pipeline */
gst_bin_add_many (GST_BIN (pipeline),comp, queue, sink, NULL);
g_signal_connect (comp, "pad-added", G_CALLBACK (on_pad_added),queue);
gst_element_link (queue, sink);
return pipeline;
}
void startPlay(GstElement * pip)
{
/* Set the pipeline to "playing" state*/
gst_element_set_state (pip, GST_STATE_PLAYING);
}
int main(gint argc, gchar *argv[])
{
GMainLoop *loop = NULL;
/* init GStreamer */
gst_init (&argc, &argv);
gst_controller_init (&argc, &argv);
loop = g_main_loop_new (NULL, FALSE);
/* chequeamos sintaxis */
if (argc != 3)
{
g_print ("Uso: %s <URI1> <URI2>\n", argv[0]);
return -1;
}
GstElement * play = getSetPipeline(argv);
GstBus *bus2 = gst_pipeline_get_bus (GST_PIPELINE (play));
gst_bus_add_watch (bus2, bus_call, loop);
gst_object_unref (bus2);
cout << "...PLAY" << endl;
startPlay(play);
GST_DEBUG_BIN_TO_DOT_FILE(GST_BIN(play),
GST_DEBUG_GRAPH_SHOW_ALL,"audio2");
/* now run */
g_main_loop_run (loop);
/* also clean up */
gst_element_set_state (play, GST_STATE_NULL);
gst_object_unref (GST_OBJECT (play));
return 0;
}
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