一台视频混合渲染器 9 (VMR9) 可以渲染更多视频流吗？

发布于 2024-11-05 10:16:41 字数 313 浏览 0 评论 0原文

我使用相同数量的 VMR9 实例以 Windows 形式渲染多个视频流。我使用 DirectShowLib-2005 在 C# 中执行此操作。

如果需要显示 100 个视频，我将创建 100 个 FilterGraph (IFilterGraph2)，每个 FilterGraph 将容纳一个 VMR9 实例 (VideoMixinRenderer9)，每个实例将渲染 1 个视频流。

这会很快耗尽 RAM...

我可以让一个 VMR9 过滤器渲染多个视频流，这样我就可以减少 VMR9 实例的数量，并渲染更多数量的视频流吗？

任何帮助将不胜感激。

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沉默的熊 2024-11-12 10:16:41

嗯...我想通了...如果有人有更好的示例，请在此处发布，我会将其标记为已接受的答案。

图表：
我想用一个 VMR9 渲染器渲染的图表

如果您在 GrapgEdit（或其他东西）中渲染它，它会显示第一个（ Input0) 流和其下方的第二个流 (Input1)，但我希望它们同时可见！

为此，必须对 VMR9 进行如下配置（错误处理和省略一些 VMR9 配置）：

//Setting VMR9 to run in WINDOWLESS MODE
filterConfig = (IVMRFilterConfig9)vmr;
filterConfig.SetRenderingMode(VMR9Mode.Windowless);

//Number of streams that I want to render together (mix)
filterConfig.SetNumberOfStreams(2);

//Get the MIXER CONTROL that will be used to configure video rendering surfaces
mixerCtrl = (IVMRMixerControl9)vmr;

//*** RENDER THE PINS SO THE GRAPH CONNECTS CORRECTLY (omitted) ***

//Define areas of the clipping window that will be covered by each video stream
NormalizedRect r1 = new NormalizedRect(0,0,0.5f, 0.5f);
NormalizedRect r2 = new NormalizedRect(0.5f, 0.5f, 1f, 1f);

//For each stream (0 and 1) set the output rect
mixerCtrl.SetOutputRect(0, ref r1);
mixerCtrl.SetOutputRect(1, ref r2);

此后，流将在剪辑窗口的左上角和右下角部分呈现，并且它们都是正确显示和渲染！！！
显示包含使用一个 VMR9 渲染的 2 个视频流的结果剪辑窗口

如果您想显示更多视频流，只需 相应地设置NumberOfStreams，并为每个流配置NormalizedRect。这样我就可以使用一个 VMR9 实例渲染更多流，而且不需要担心 RAM 耗尽。

现在VMR9真正的酷炫表现出来了...:D xD

PS
看起来 16 个流已经是极限了......

Well... I figured it out... if someone has a better example, please post it here, I will mark it as an accepted answer.

The graph:
The graph I want to render with one VMR9 renderer

If you render this in GrapgEdit (or something else) it displays the first (Input0) stream and the second one (Input1) underneath it, but I want them to be visible at the same time!

To do this, VMR9 must be configured as such (error handling and some VMR9 configuration omitted):

//Setting VMR9 to run in WINDOWLESS MODE
filterConfig = (IVMRFilterConfig9)vmr;
filterConfig.SetRenderingMode(VMR9Mode.Windowless);

//Number of streams that I want to render together (mix)
filterConfig.SetNumberOfStreams(2);

//Get the MIXER CONTROL that will be used to configure video rendering surfaces
mixerCtrl = (IVMRMixerControl9)vmr;

//*** RENDER THE PINS SO THE GRAPH CONNECTS CORRECTLY (omitted) ***

//Define areas of the clipping window that will be covered by each video stream
NormalizedRect r1 = new NormalizedRect(0,0,0.5f, 0.5f);
NormalizedRect r2 = new NormalizedRect(0.5f, 0.5f, 1f, 1f);

//For each stream (0 and 1) set the output rect
mixerCtrl.SetOutputRect(0, ref r1);
mixerCtrl.SetOutputRect(1, ref r2);

After this, the streams are rendered in top left and bottom right portion of the clipping window, and they are both shown and rendered correctly!!!
Shows the resulting clipping window containing 2 video streams rendered with one VMR9

If you want to display more video streams, just SetNumberOfStreams accordingly, and configure NormalizedRect for each one. This way I can render more streams with one VMR9 instance, and I don't need to worry about RAM running out.

Now the true coolness of VMR9 shows up... :D xD

PS
It looks like 16 streams is the limit...

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