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 parent

WARNING **: 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 &quot;NewSample&quot; 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=&quot;data_%02d.mp4&quot; max-size-time=10000000000 

So, I want to reproduce it in my C# code and use my custom sink instead of default one (filesink). In 
[1] it is stated:

&gt; By default, it uses mp4mux and filesink, but they can be changed via the &#39;muxer&#39; and &#39;sink&#39; properties.

Here is my code:

    
        var rtph264depay = ElementFactory.Make(&quot;rtph264depay&quot;, &quot;rtph264depay&quot;);
        var h264parse = ElementFactory.Make(&quot;h264parse&quot;, &quot;h264parse&quot;);
        var splitmuxsink = ElementFactory.Make(&quot;splitmuxsink&quot;, &quot;splitmuxsink&quot;);
        splitmuxsink[&quot;max-size-time&quot;] = 10000000000;
        splitmuxsink[&quot;async-finalize&quot;] = false;

      
        var tempBin = splitmuxsink as Bin;

        var appSink = new AppSink(&quot;my_appsink&quot;);
        appSink.NewSample += AppSink_NewSample;
        appSink.EmitSignals = true;

        splitmuxsink[&quot;sink&quot;] = appSink;	

Code above gives a warn:

 WARN                     bin gstbin.c:1391:gst_bin_add_func:&lt;splitmuxsink&gt; Element &#39;my_appsink&#39; already has parent

WARNING **: 18:57:08.508: Could not add sink elements - splitmuxsink will not work

Given 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&#39;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：

```python
pipeline.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

pipeline.Add(rtspsrc, rtph264depay ,h264parse, splitmuxsink,  appSink);

    pipeline.Add(rtspsrc, rtph264depay ,h264parse, splitmuxsink ); //exclude appsink