Removing silence from a stream

[Mailing List SVR]

Hi,

can you share your input file please?

Nicola

Il 29/02/2016 11:11, Sagar ha scritto:
> I am using /gst-launch-1.0 -v -t -m filesrc location=myvideo.webm ! decodebin
> ! audioconvert ! removesilence remove=true ! pulsesink/  what I want is that
> the audio to be played with out the silence
>
> but remove silence doesnt seem to be doing that.
>
>
> I also tried an alternative method by using /valve/ but there is some
> timestamp issue because of which some voice audio is lost.
>
> #define GLIB_DISABLE_DEPRECATION_WARNINGS
>
> #include <gst/gst.h>
> #include <string.h>
> #include <math.h>
>
> static GMainLoop *loop;
> GstElement *play;
> GstElement *valve;
>
> int isSpeaking =1;
> GstClockTime silencestarttime = 0;
> GstClockTime silenceendtime = 0;
>
> static gboolean
> my_voice_callback (GstBus     *bus,
> 		 GstMessage *message,
> 		 gpointer    data)
> {
> 	if (message->type == GST_MESSAGE_EOS) {
> 		g_main_loop_quit (loop);
> 	}
> 	return TRUE;
> }
>        
> static gboolean
> my_bus_callback (GstBus     *bus,
> 		 GstMessage *message,
> 		 gpointer    data)
> {
>    GstClockTime endtime;
>    if (message->type == GST_MESSAGE_EOS) {
>    	if(isSpeaking ==0){
> 		silenceendtime = endtime;
> 		g_print ("\tsilence start time: %" GST_TIME_FORMAT "\n",GST_TIME_ARGS
> (silencestarttime));
> 		g_print ("\tsilence end time: %" GST_TIME_FORMAT "\n",GST_TIME_ARGS
> (silenceendtime));
> 		
>    	}
>    	g_main_loop_quit (loop);
>    }
>
>    if (message->type == GST_MESSAGE_ELEMENT) {
>      const GstStructure *s = gst_message_get_structure (message);
>      const gchar *name = gst_structure_get_name (s);
>
>      if (strcmp (name, "level") == 0) {
>        gint channels;
>        GstClockTime starttime;
>        
>        gdouble rms_dB, peak_dB, decay_dB;
>        gdouble rms;
>        const GValue *array_val;
>        const GValue *value;
>        GValueArray *rms_arr, *peak_arr, *decay_arr;
>        gint i;
>
>        if (!gst_structure_get_clock_time (s, "endtime", &endtime))
>          g_warning ("Could not parse endtime");
>
> 	  starttime = endtime - GST_SECOND;	
> 	
> 	  if(silencestarttime == 0){
> 	  	silencestarttime =starttime ;
> 	  }
> 	
> 	  if(silenceendtime == 0){
> 	  	silenceendtime =starttime;
> 	  }
> 	
>        /* the values are packed into GValueArrays with the value per channel
> */
>        array_val = gst_structure_get_value (s, "rms");
>        rms_arr = (GValueArray *) g_value_get_boxed (array_val);
>
>        array_val = gst_structure_get_value (s, "peak");
>        peak_arr = (GValueArray *) g_value_get_boxed (array_val);
>
>        array_val = gst_structure_get_value (s, "decay");
>        decay_arr = (GValueArray *) g_value_get_boxed (array_val);
>
>        /* we can get the number of channels as the length of any of the value
>         * arrays */
>        channels = rms_arr->n_values;
>        
>        for (i = 0; i < channels; ++i) {
> 	    value = g_value_array_get_nth (rms_arr, i);
> 	    rms_dB = g_value_get_double (value);
>
> 	    value = g_value_array_get_nth (peak_arr, i);
> 	    peak_dB = g_value_get_double (value);
>
> 	    value = g_value_array_get_nth (decay_arr, i);
> 	    decay_dB = g_value_get_double (value);
> 	
> 	    if(rms_dB > -40){
> 			if(isSpeaking ==0){
> 				g_object_set(G_OBJECT(valve), "drop", FALSE , NULL);
> 						
> 				
> 				silenceendtime = starttime;
> 				g_print ("\tsilence start time: %" GST_TIME_FORMAT "\n",GST_TIME_ARGS
> (silencestarttime));
> 				g_print ("\tsilence end time: %" GST_TIME_FORMAT "\n",GST_TIME_ARGS
> (silenceendtime));
> 				
> 			}
> 			isSpeaking = 1;
> 		}
> 		else{
> 			if(isSpeaking==1){
> 				g_object_set(G_OBJECT(valve), "drop", TRUE , NULL);
> 				silencestarttime = starttime;
> 			}
> 			isSpeaking =0;
> 			g_print ("\nsilence: %" GST_TIME_FORMAT "\n",GST_TIME_ARGS (starttime));
> 			continue;
> 		}
>        }
>      }
>    }
>    
>
>    /* we want to be notified again the next time there is a message
>     * on the bus, so returning TRUE (FALSE means we want to stop watching
>     * for messages on the bus and our callback should not be called again)
>     */
>    return TRUE;
> }
>
> int
> main (int argc, char *argv[])
> {
>
>    GstBus *bus;
>
>    /* gstreamer */
>    gst_init (&argc, &argv);
>    
>    /* we need to run a GLib main loop to get the messages */
>    loop = g_main_loop_new (NULL, FALSE);
>    
>    play = gst_parse_launch("filesrc location=audiosilence.mp4 ! decodebin !
> audioconvert !  level interval=1000000000 !tee name=t ! queue ! fakesink t.
> ! queue ! valve name=valve ! audioconvert ! wavenc !  filesink
> location=valve.wav", NULL);
>    g_assert (play);
>   
>   
>    bus = gst_pipeline_get_bus (GST_PIPELINE (play));
>    gst_bus_add_watch (bus, my_bus_callback, NULL);
>
>    gst_element_set_state (play, GST_STATE_PLAYING);
>
>    valve = gst_bin_get_by_name(GST_PIPELINE (play),"valve");
>    g_main_loop_run (loop);
>   
>    gst_element_set_state (play, GST_STATE_NULL);
>    gst_object_unref (GST_OBJECT (play));
>    
>    gst_object_unref (bus);
>
>    gst_object_unref (GST_OBJECT (valve));
>    g_main_loop_unref (loop);
>    
>    return 0;
> }
>
>
>
>
> P.S: What I want to achive is a non silent chunks audio.
>
>
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Removing-silence-from-a-stream-tp973199p4676108.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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