dm365 osd vpde 后端流网络传送(编码后)

最新推荐文章于 2016-12-22 14:06:54 发布

yangzhifu

最新推荐文章于 2016-12-22 14:06:54 发布

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分类专栏： ti davinci 文章标签：网络 video reference output network stream

本文链接：https://blog.youkuaiyun.com/yangzhifu/article/details/7251899

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研究发现DM365后端添加OSD的图像流无法直接通过网络传输到另一端，除非通过处理器进行输入或外部回路。建议在不使用OSD或实现软件OSD的情况下，使用IPNetcam参考设计等软件将视频流传输到网络PC。

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最近在研究如果将dm365后端添加了osd的图像流通过网络传送到PC,看了很多文档，最后在ti官方网站上面得到了如下的信息：

The way that the OSD hardware in the VPBE was designed the final OSD mixed output is only available on the outgoing end of the VPBE, in otherwords there is no path for the video containing the OSD to get back into DDR, so it is not possible for the DM355 to send the OSD mixed video output to the network unless the VPBE output is taken in by another processor or looped back into the VPFE externally.

This being said, if you can deal without the OSD or implement OSD in software than you could use software like that which is included with the IP Netcam reference designs to stream video to a networked PC.

As Bernie indicated, the OSD functionality is part of the Video Port Back End (VPBE) which drives the video output port of the DM355. On the Base IPNC reference design, this would be available on the Video output. The DM355 does not have a way to bring the mixed video back into SDRAM that could be encapsulated in a network packet and sent over the network interface.

最后得到的结果是不能通过直接将dm365有添加了osd的数据通过网络传送到另外一端，但是直接给display线程显示还是可以的...