英文:
Gstreamer (-sharp)-- how to add my custom sink to splitmuxsink
问题
我想要为splitmuxsink添加自定义的输出，也就是说，我想要将来自IP摄像头的h264流按照10秒的间隔分割成块，但我希望它在我控制的缓冲区中进行。类似于下面的管道，但不是存储到文件，而是处理appsink事件"NewSample"并在我自己的缓冲区上工作，而不是存储到文件：
gst-launch-1.0 rtspsrc buffer-mode=0 location=rtsp://camera?videocodec=h264 ! rtph264depay ! h264parse ! splitmuxsink location="data_%02d.mp4" max-size-time=10000000000
因此，我想在我的C#代码中复制它，并在默认的sink（filesink）之外使用我的自定义sink。在文档中指出：
默认情况下，它使用mp4mux和filesink，但可以通过'muxer'和'sink'属性进行更改。
以下是我的代码：
var rtph264depay = ElementFactory.Make("rtph264depay", "rtph264depay");var h264parse = ElementFactory.Make("h264parse", "h264parse");var splitmuxsink = ElementFactory.Make("splitmuxsink", "splitmuxsink");splitmuxsink["max-size-time"] = 10000000000;splitmuxsink["async-finalize"] = false;var tempBin = splitmuxsink as Bin;var appSink = new AppSink("my_appsink");appSink.NewSample += AppSink_NewSample;appSink.EmitSignals = true;splitmuxsink["sink"] = appSink;
上面的代码会产生一个警告：
WARN bin gstbin.c:1391:gst_bin_add_func:<splitmuxsink> Element 'my_appsink' already has parentWARNING **: 18:57:08.508: Could not add sink elements - splitmuxsink will not work
考虑到appSink的Parent属性为空。我尝试了另一种方法：
appSink.Parent = tempBin; //或者 tempBin.Add(appSink)
但它产生了完全相同的错误。
我做错了什么？是否有另一种方法可以通过splitmuxsink自定义sink手动处理h264块到我的缓冲区中？
提前感谢您的回答。
<details><summary>英文:</summary>I want to add my custom sink for splitmuxsink, namely I want to split h264 stream from ip camera into chunks by 10 seconds, but I want it in some controlled by me buffer. Smth like pipeline below but instead of file, I want to handle appsink event "NewSample" and work with 10 second buffer on my own, not to store to file:gst-launch-1.0 rtspsrc buffer-mode=0 location=rtsp://camera?videocodec=h264 ! rtph264depay ! h264parse ! splitmuxsink location="data_%02d.mp4" max-size-time=10000000000So, I want to reproduce it in my C# code and use my custom sink instead of default one (filesink). In[1] it is stated:> By default, it uses mp4mux and filesink, but they can be changed via the 'muxer' and 'sink' properties.Here is my code:var rtph264depay = ElementFactory.Make("rtph264depay", "rtph264depay");var h264parse = ElementFactory.Make("h264parse", "h264parse");var splitmuxsink = ElementFactory.Make("splitmuxsink", "splitmuxsink");splitmuxsink["max-size-time"] = 10000000000;splitmuxsink["async-finalize"] = false;var tempBin = splitmuxsink as Bin;var appSink = new AppSink("my_appsink");appSink.NewSample += AppSink_NewSample;appSink.EmitSignals = true;splitmuxsink["sink"] = appSink;Code above gives a warn:WARN bin gstbin.c:1391:gst_bin_add_func:<splitmuxsink> Element 'my_appsink' already has parentWARNING **: 18:57:08.508: Could not add sink elements - splitmuxsink will not workGiven that property Parent of appSink is null. Another approach I use:appSink.Parent = tempBin; //or tempBin.Add(appSink)gives the very same error.What I'm doing wrong? Is there another approach to handle h264 chunks manually in my buffer via splitmuxsink custom sink?Thanks in advance.[1]: https://gstreamer.freedesktop.org/documentation/multifile/splitmuxsink.html?gi-language=c#properties</details># 答案1**得分**: 1代码中存在一个问题，该问题未在上面给出，即我将appSink作为单独的元素添加到了管道中：```pythonpipeline.Add(rtspsrc, rtph264depay ,h264parse, splitmuxsink, appSink);
这是错误的，因为appSink已经是splitmuxsink的一部分。所以一切似乎都可以这样工作：
pipeline.Add(rtspsrc, rtph264depay ,h264parse, splitmuxsink ); // 排除appSink
英文:
There seems to be the issue with code, which is not presented above, namely I added appSink as separate element to pipeline:
pipeline.Add(rtspsrc, rtph264depay ,h264parse, splitmuxsink, appSink);
which is wrong, because appSink is already part of splitmuxsink. So everything seems to be working with:
pipeline.Add(rtspsrc, rtph264depay ,h264parse, splitmuxsink ); //exclude appsink
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