# \[beta testing\] nodes for live streaming mp4
**URL:** https://discourse.nodered.org/t/beta-testing-nodes-for-live-streaming-mp4/33743
**Category:** Share Your Nodes
**Created:** [4 October 2020 23:35 UTC](https://discourse.nodered.org/t/beta-testing-nodes-for-live-streaming-mp4/33743 "2020-10-04T23:35:12Z")
**Posts on this page:** 3
**Page:** 18
### Author:  [@Lupin\_III](https://discourse.nodered.org/u/Lupin_III)
#### Post date: [21 September 2021 08:47 UTC](https://discourse.nodered.org/t/beta-testing-nodes-for-live-streaming-mp4/33743/343 "2021-09-21T08:47:10Z")
Hi, I don't know if this can help (I haven't read all the messages from the beginning but I'll do it as soon as I can). With sub-flow you can set some "environment properties" that can be changed via messages too. And these can be even used to modify some settings of the inside nodes. I used this feature once and it took a while to understand it and how it works
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### Author:  [@Lupin\_III](https://discourse.nodered.org/u/Lupin_III)
#### Post date: [21 September 2021 08:57 UTC](https://discourse.nodered.org/t/beta-testing-nodes-for-live-streaming-mp4/33743/344 "2021-09-21T08:57:08Z")
You can set the environment variables for the subflow and for its input/output. If I'm not wrong I remember I was able to pass them as value to the inside node
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [5 October 2021 08:57 UTC](https://discourse.nodered.org/t/beta-testing-nodes-for-live-streaming-mp4/33743/345 "2021-10-05T08:57:12Z")
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