gstreamer停止沉默流媒体
我有两台终端在我的ubuntu机器上打开。 这个想法是对麦克风说话,然后通过扬声器播放。 在第一个终端上,我使用以下命令设置了gstreamer扬声器:
gst-launch-0.10 pulsesrc! audioconvert! audio / x-raw-int,channels = 1,depth = 16,width = 16,rate = 22000! rtpL16pay! udpsink host = localhost port = 5000
另一个终端上的监听器使用这个命令
gst-launch-0.10 -v udpsrc port = 5000! “application / x-rtp,media =(string)audio,clock-rate =(int)22000,width = 16,height = 16,encoding-name =(string)L16,encoding-params =(string)1,channels =(int)1,channel-positions =(int)1,payload =(int)96“! rtpL16depay! audioconvert! alsasink sync = false
我现在想做的就是启动代码,并在大约2秒没有声音时自动停止流。 我应该如何去做这件事?
Udpsrc有一个名为“timeout”的属性,通过设置此属性,元素将在管道总线上发布消息,以防在特定时间内没有收到包。 你的接收管道应该看起来像这样:
gst-launch-0.10 -v udpsrc port = 5000 timeout = 2000! “application / x-rtp,media =(string)audio,clock-rate =(int)22000,width = 16,height = 16,encoding-name =(string)L16,encoding-params =(string)1,channels =(int)1,channel-positions =(int)1,payload =(int)96“! rtpL16depay! audioconvert! alsasink sync = false
巴士回调应该看起来像这样:
gboolean
bus_callback (GstBus * bus, GstMessage * message, gpointer data)
{
GError *error;
gchar *parsed_txt;
const GstStructure *st = gst_message_get_structure (message);
const gchar *typename = GST_MESSAGE_TYPE_NAME (message);
const gchar *srcname = GST_MESSAGE_SRC_NAME (message);
GST_LOG ("New %s message from %s: %s", typename, srcname,
st ? gst_structure_get_name(st) : "(null)");
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_INFO:
gst_message_parse_info (message, &error, &parsed_txt);
g_print ("%sn", parsed_txt);
g_free (parsed_txt);
g_error_free (error);
break;
case GST_MESSAGE_ERROR:
gst_message_parse_error (message, &error, &parsed_txt);
GST_ERROR ("%s (%s)", error->message,
parsed_txt ? parsed_txt : "no debug info");
if (parsed_txt)
g_free (parsed_txt);
GST_DEBUG ("No error handling callback registered");
break;
case GST_MESSAGE_ELEMENT:
/* We don't care for messages other than timeouts */
if (!gst_structure_has_name (st, "GstUDPSrcTimeout"))
break;
GST_WARNING ("Timeout received from udpsrc");
gst_element_set_state(GST_ELEMENT (pipeline),GST_STATE_NULL));
break;
default:
break;
}
祝你好运!
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