# How to inject metadata into HLS live stream at a specific time?
**URL:** https://community.wowza.com/t/how-to-inject-metadata-into-hls-live-stream-at-a-specific-time/44768
**Category:** Wowza Streaming Engine
**Created:** [July 6, 2015, 10:04am UTC](https://community.wowza.com/t/how-to-inject-metadata-into-hls-live-stream-at-a-specific-time/44768 "2015-07-06T10:04:24Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Yuxiang\_Shen](https://community.wowza.com/u/Yuxiang_Shen)
#### Post date: [July 6, 2015, 10:04am UTC](https://community.wowza.com/t/how-to-inject-metadata-into-hls-live-stream-at-a-specific-time/44768/1 "2015-07-06T10:04:24Z")
Hi there,
I need to insert metadata into HLS live stream at a specific time, like “10.5s after the beginning”. Now I know how to insert ID3 tags into it, but I cannot control the time. Is there any way to do this in Wowza?
Thanks!
Yorick
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### Author:  [@Yuxiang\_Shen](https://community.wowza.com/u/Yuxiang_Shen)
#### Post date: [July 6, 2015, 3:16pm UTC](https://community.wowza.com/t/how-to-inject-metadata-into-hls-live-stream-at-a-specific-time/44768/2 "2015-07-06T15:16:03Z")
Found an expedient way to achieve this: IMediaStream.timeCode. (and IMediaStream.videoTimeCode). This method returns the time relative to the beginning of this stream. For example, if I wanna insert metadata at 10.5s, I can call new Timer().schedule(metadataInjector(…), 10.5 \* 1000 - currentStream.videoTimeCode()). I checked the output stream with DVBInspector and found the metadata was inserted roughly around 10.5s (with about 500ms’ deviation).
I’d appreciate it if someone could propose a more accurate way.
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### Author:  [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)
#### Post date: [July 15, 2015, 7:08am UTC](https://community.wowza.com/t/how-to-inject-metadata-into-hls-live-stream-at-a-specific-time/44768/3 "2015-07-15T07:08:55Z")
Yorick, you might have a read through this [forum post](http://community.wowza.com/t/-/43622) for an answer
Salvadore