# How to display CCTV camera in dashboard (RTSP)

**URL:** <https://discourse.nodered.org/t/how-to-display-cctv-camera-in-dashboard-rtsp/5860>\
**Category:** General\
**Created:** [16 December 2018 23:37 UTC](https://discourse.nodered.org/t/how-to-display-cctv-camera-in-dashboard-rtsp/5860 "2018-12-16T23:37:49Z")\
**Posts on this page:** 1\
**Showing post:** 78

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**Author:** ![BartButenaers](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/bartbutenaers/32/10476_2.png) [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Post date:** [9 February 2019 21:13 UTC](https://discourse.nodered.org/t/how-to-display-cctv-camera-in-dashboard-rtsp/5860/78 "2019-02-09T21:13:15Z")

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> [@wb666greene](#):
>
> entire webpage becomes very sluggish

@wb666greene: Yes that is indeed when the websocket is loaded to high. Dashboard won't be responsive anymore. That is why I wanted (in my node-red-contrib-ui-camera node) to have two modes:

- Push the messages to the dashboard, since that is fairly easy for users (just send a message with an image to the node's input). But I will warn them that this is not advised for lots of data.
- Pull the messages from the node-red flow (by using a 'src' attribute). A bit more work to setup, but much better performance.

> [@happytm](#):
>
> Following Link has lot of information about different video streaming related topics including webrtc

@happytm. WebRtc is indeed also an option. But perhaps somebody can later on make a dedicated UI node for webrtc. And as @wb666greene responded to your post, I also 'think' we cannot use it here for decoding a stream into individual images (like rtsp).

> [@dceejay](#):
>
> Ideally it could be a “media” widget and support both stills or video.

@dceejay: in that case you are aiming at the [node-red-contrib-ui-media](https://discourse.nodered.org/t/announce-node-red-contrib-ui-media/7669)? In the first version of my node-red-contrib-ui-camera node, I also had stuff provided to show images and video files. But I removed it from my node, since camera content has no finite length (like an image or video file). And I want to have PTZ controls, zones (with polygons), ... Not sure if it is wise to put all together in a single node, just because they both show an image (sequence)? To me camera images belong in a dedicated node...

> [@wb666greene](#):
>
> Absolutely, the main potential issue I see is that generally the AI (or other downstream processing) can't keep up with the full rtsp frame rate unless only a single stream is being processed or its a low rate stream, so many frames need to be "dropped".

The word "_absolutely_" sounds as music in my ears. This means that all experiments above have at least resulted in something usable. 🎉🎈

But indeed like you say: by having solved the rtsp stream decoding, we will end up with a massive amount of images in Node-RED. New developments will be required to be able to handle all this data. But one step at a time ... We have already done a lot of experiments with OpenCv matrices in Node-RED, but we had lots of issues when messages (containing references to OpenCv matrices) are cloned by Node-RED, and when NodeJS starts its garbage collection of those messages. But I have no time at the moment to digg into that again ...

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