我正在尝试在kurento mediapipeline上应用一些GStreamer插件，在这里我希望Gstreamer代码在独立程序中正常工作，以发送与cutter相关的回调消息。
以下是我的代码：
namespace kurento
{
namespace module
{
namespace vadcustomfilter
{
std::string Id = "";
void VADCustomFilterImpl::busMessage(GstMessage * message)
{
GST_ERROR("***In BusMessage***");
if (message->type == GST_MESSAGE_EOS)
{
g_object_set(G_OBJECT(valve), "drop", FALSE, NULL);
}
const GstStructure *s = gst_message_get_structure(message);
const gchar *name = gst_structure_get_name(s);
GST_INFO("Name: %s\n", name);
if (message->type == GST_MESSAGE_ELEMENT)
{
if (strcmp(name, "cutter") == 0)
{
GstClockTime time = 0;
GstClockTime prevsilencetime = 0;
if (!gst_structure_get_boolean(s, "above", &above))
{
GST_ERROR("could not parse above");
}
GST_INFO("above: %d", above);
if (above)
{
if (isSpeaking == 0)
{
revsilencetime = time;
g_object_set(G_OBJECT(valve), "drop", FALSE, NULL);
}
/*Send Voice Detected Event */
try
{
GST_ERROR("Sending Event: VoiceDetected");
VoiceDetected event(shared_from_this(), "voice-detected", Id.c_str());
signalVoiceDetected(event);
GST_ERROR("Sent Event: VoiceDetected");
}
catch (std::bad_weak_ptr & e)
{
GST_ERROR("EXCEPTION: Voice activity detected ");
}
isSpeaking = 1;
}
else
{
if (isSpeaking == 1)
{
g_object_set(G_OBJECT(valve), "drop", TRUE, NULL);
}
isSpeaking = 0;
}
}
}
}
VADCustomFilterImpl::VADCustomFilterImpl(const boost::property_tree::
ptree & config,
std::shared_ptr <
MediaPipeline > mediaPipeline,
const std::string &pipelineId) :FilterImpl
(config,
std::dynamic_pointer_cast <MediaObjectImpl> (mediaPipeline))
{
-->Edit Start
g_object_set (element, "filter-factory", "audioconvert", NULL);
g_object_get (G_OBJECT (element), "filter", &audioconvertfilter, NULL);
if (audioconvertfilter == NULL) {
throw KurentoException (MEDIA_OBJECT_NOT_FOUND, "MediaObject not found: audioconvertfilter");
}
g_object_set (element, "filter-factory", "cutter", NULL);
g_object_get (G_OBJECT (element), "filter", &cutterfilter, NULL);
if (cutterfilter == NULL) {
throw KurentoException (MEDIA_OBJECT_NOT_FOUND, "MediaObject not found: cutterfilter");
}
g_object_set (G_OBJECT (cutterfilter), "threshold-dB", -39.0, NULL);
g_object_set (G_OBJECT (cutterfilter), "run-length", 400000000, NULL);
g_object_set (element, "filter-factory", "vadcustomfilter", NULL);
g_object_get (G_OBJECT (element), "filter", &vadCustomFilter, NULL);
bus_handler_id = 0;
GST_ERROR("PipelineId: constructor %s",pipelineId.c_str());
Id = pipelineId;
-->Edit End
}
void VADCustomFilterImpl::postConstructor()
{
GstBus *bus;
std::shared_ptr < MediaPipelineImpl > pipe;
FilterImpl::postConstructor();
pipe =
std::dynamic_pointer_cast <MediaPipelineImpl>
(getMediaPipeline());
g_assert(pipe);
/* #1. Add cutter filter here */
create_gst_cutter_filter(pipe);
bus = gst_pipeline_get_bus(GST_PIPELINE(pipe->getPipeline()));
g_assert(bus);
bus_handler_id = register_signal_handler(G_OBJECT(bus),
"message",
std::function <
void(GstElement *,
GstMessage *) >
(std::bind
(&VADCustomFilterImpl::
busMessage, this,
std::placeholders::_2)),
std::dynamic_pointer_cast <
VADCustomFilterImpl>
(shared_from_this()));
GST_ERROR("busMessage added successfully.");
g_object_unref(bus);
}
VADCustomFilterImpl::~VADCustomFilterImpl()
{
std::shared_ptr < MediaPipelineImpl > pipe;
if (bus_handler_id > 0)
{
pipe =
std::dynamic_pointer_cast <MediaPipelineImpl>
(getMediaPipeline());
GstBus *bus =
gst_pipeline_get_bus(GST_PIPELINE(pipe->getPipeline()));
unregister_signal_handler(bus, bus_handler_id);
g_object_unref(bus);
}
}
MediaObjectImpl *VADCustomFilterImplFactory::createObject(const boost::
property_tree::
ptree &
config,
std::
shared_ptr <
MediaPipeline
>
mediaPipeline,
const std::string &pipelineId)
const
{
GST_ERROR("Pipeline Id createObject %s", pipelineId.c_str());
return new VADCustomFilterImpl(config, mediaPipeline, pipelineId.c_str());
}
VADCustomFilterImpl::StaticConstructor VADCustomFilterImpl::
staticConstructor;
VADCustomFilterImpl::StaticConstructor::StaticConstructor()
{
GST_DEBUG_CATEGORY_INIT(GST_CAT_DEFAULT, GST_DEFAULT_NAME, 0,
GST_DEFAULT_NAME);
}
}/* vadcustomfilter */
}/* module */
}/* kurento */
我正在使用GstMessageTag在日志中打印gst_structure_get_name(name)的回调，但我没有收到cutter
代码流程中是否有任何缺失/错误？
修改：删除了添加插件过滤器的gstreamer方式，尝试在audioconvert上添加cutter element
但我在addIceCandidate上收到错误：
Req-> {"id":13,"method":"invoke","params":{"object":"ff394885-ff7b-4cd2-ac83-190ab58056c3_kurento.MediaPipeline/4911aa60-27e4-461e-86c0-10532bc30d4f_kurento.WebRtcEndpoint","operation":"addIceCandidate","operationParams":{"candidate":{"sdpMid":"audio","__module__":"kurento","sdpMLineIndex":0,"__type__":"IceCandidate","candidate":"candidate:1226269011 1 udp 2122260223 172.24.9.207 62808 typ host generation 0 ufrag nSC45+9JNTCJm+yr"}},"sessionId":"15daae09-de86-4293-a3de-28f33f2d0b16"},"jsonrpc":"2.0"}
Res {"id":13,"error":{"code":40401,"message":"Error adding candidate","data":{"type":"ICE_ADD_CANDIDATE_ERROR"}},"jsonrpc":"2.0"}
答案 0 :(得分：2)
您创建gstreamer元素的方式似乎不是Kurento期望的方式。基本上，您正在函数create_gst_cutter_filter中创建未正确链接的元素。
如果你正在创建一个过滤器，所有gstreamer的东西（创建元素并连接它们）应该在你调用vadcustomfilter的gstreamer元素中完成，这个元素只需要一个接收器和一个src pad。
如果你想创建一种不同类型的元素，因为你正在添加mulltifilesink，你需要从MediaElement扩展并创建一个从KmsElement扩展的gstreamer元素。您可以在kms-elements project中看到相关示例。
修改
关于服务器返回的错误。它似乎与此处的问题无关，而是与依赖性问题有关。请回来this question并检查您是否遇到同样的问题