# scan through the m4fd to get the data back out of them after injecting them into a live stream on nDVR.

**URL:** <https://community.wowza.com/t/scan-through-the-m4fd-to-get-the-data-back-out-of-them-after-injecting-them-into-a-live-stream-on-ndvr/52863>\
**Category:** Wowza Developer Dojo\
**Tags:** wowza-streaming-server-java-api\
**Created:** [February 18, 2019, 3:36pm UTC](https://community.wowza.com/t/scan-through-the-m4fd-to-get-the-data-back-out-of-them-after-injecting-them-into-a-live-stream-on-ndvr/52863 "2019-02-18T15:36:49Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![alex\_byrd1](https://avatars.discourse-cdn.com/v4/letter/a/7bcc69/32.png) [@alex\_byrd1](https://community.wowza.com/u/alex_byrd1)\
**Post date:** [February 18, 2019, 3:36pm UTC](https://community.wowza.com/t/scan-through-the-m4fd-to-get-the-data-back-out-of-them-after-injecting-them-into-a-live-stream-on-ndvr/52863/1 "2019-02-18T15:36:49Z")

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I have built the DVR insert data into the stream with http inject listener and the other java modules needed. I now have a system that injects the data into the stream and works with the nDVR and the data is still in sync with the video, on playing “back in time” or live - I can see the injected data in the Wowza player.

I would like to be able to scan through the data to pull out time points so the user can jump around the DVR stream and get to the bit they want. Is there a way to pull out the m4fd data? or just stream it out very fast without the video to get the data points? alternative suggestions welcome

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