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Question by Alexandre Licinio · Sep 27, 2018 at 04:49 PM · wowza streaming enginewowza ndvrwowza player

WSE nDVR Adaptive bitrate goes lowest resolution when playing

Hello,

I have strange issue.


When i play the stream with the wowza player with /live/ngrp:myStream.stream_all/playlist.m3u8?DVR the player starts with the higher resolution then go down to the lowest and never get back to the higher resolution.

When i play the same stream without ?DVR at the end so the live, it plays the higher resolution and adapts itself to the network conditions. Everything is working well.

I didn't find same issue explained in the forum :(

Thanks

Cheers

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Answer by Rose Power-Wowza Community Manager · Sep 28, 2018 at 09:07 PM

hmmm...I think it's best at this point to have our engineers run some tests to debug. Can you go ahead and open a support ticket?

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avatar image Alexandre Licinio · Sep 28, 2018 at 09:08 PM 0
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Yes Rose, i will, thanks for your support.

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Answer by Rose Power-Wowza Community Manager · Sep 28, 2018 at 05:10 PM

Adaptive bitrate delivery - When using Wowza nDVR, you can leverage Synchronized Multimedia Integration Language (SMIL) files for adaptive bitrate delivery. The SMIL workflow requires an encoder that can generate multiple bitrate streams from the same source with properly aligned keyframes.

Important: The streams used in adaptive bitrate streaming must have aligned keyframes. Wowza nDVR creates chunks based on the keyframe alignment and the adaptive bitrate switching occurs on chunk boundaries.
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Answer by Rose Power-Wowza Community Manager · Sep 28, 2018 at 05:14 PM

Please refer to this as well @Alexandre Licinio:

https://www.wowza.com/docs/how-to-debug-dvr-abr-stream-alignment


If you still require assistance, please open a support ticket and we will work with you to resolve it. Thanks!

https://www.wowza.com/support/open-ticket

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avatar image Alexandre Licinio · Sep 28, 2018 at 09:06 PM 0
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Thanks but i followed what explained

https://www.wowza.com/docs/how-to-debug-dvr-abr-stream-alignment but the browser query forever and show nothing.

I have a live app with 4 streams:

myStream.stream_160p

myStream.stream_240p

myStream.stream_360p

myStream.stream_720p

After installing the plugin and restarting wowza and launching the stream file i query with

:8086/dvrreport?app=live&streams=myStream.stream_720p,myStream.stream_360p but the browser still loads and never stops loading.

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