#EXT-X-PRELOAD-HINT tag does not appeared in m3u8 playlist

Wowza Streaming Engine
1

Hi team,

I’ve setup LL-HLS Live stream referring following article.
https://www.wowza.com/docs/deliver-apple-low-latency-hls-live-streams-using-wowza-streaming-engine

But I cannot find the #EXT-X-PRELOAD-HINT tag in the m3u8 playlist.
I’ve checked either playlist.m3u8 and playlist_sfm4s.m3u8 and also set the properties for LL-HLS but I couldn’t.

Are there any additional settings for using Preload Hint feature?

Thanks in advance.

2

Hi @danny which version of Streaming Engine are you on? This feature was added in Engine 4.8.5.

The #EXT-X-PRELOAD-HINT tag definitely shows up in the chunklist logs and I just confirmed it does in some tests. All I can think of is that you may not have LL-HLS enabled properly, the chunks/fragments aren’t generating correctly or you’re not using an iOS device that supports the LL-HLS spec.

These are just guesses though so in order for us to truly diagnose, we’ll need a support ticket. We’ll take a closer look and find the issue with you. Thanks.

3

Hi Rose,

Thank you for your quick reply.

I use Wowza Streaming Engine ver.4.8.10.

you’re not using an iOS device that supports the LL-HLS spec

I tested the LL-HLS stream using THEOPlayer on this site and Mac Chrome.

you may not have LL-HLS enabled properly, the chunks/fragments aren’t generating correctly

To use the PRELOAD HINT feature, is it necessary to set the chunk size to a specific number of seconds or less?

Thanks