how to enabled EXT-X-ALLOW-CACHE tag

Wowza Streaming Engine
1

Hi,

Can someone point me in the right direction on how to configure wowza to create m3u8’s with the line “#EXT-X-ALLOW-CACHE:NO”

Below is a part of an m3u8 which my wowza is generating currently:

#EXTM3U

#EXT-X-TARGETDURATION:10

#EXT-X-MEDIA-SEQUENCE:1

#EXTINF:10,

media_1.mp3?wowzasessionid=xxxxxxx

#EXTINF:10,

media_2.mp3?wowzasessionid=xxxxxxx

#EXTINF:10,

media_3.mp3?wowzasessionid=xxxxxxx

#EXTINF:10,

media_4.mp3?wowzasessionid=xxxxxxx

This is what I would like the m3u8 to be instead:

#EXTM3U

#EXT-X-ALLOW-CACHE:NO

#EXT-X-TARGETDURATION:10

#EXT-X-MEDIA-SEQUENCE:1

#EXTINF:10,

media_1.mp3?wowzasessionid=xxxxxxx

#EXTINF:10,

media_2.mp3?wowzasessionid=xxxxxxx

#EXTINF:10,

media_3.mp3?wowzasessionid=xxxxxxx

#EXTINF:10,

media_4.mp3?wowzasessionid=xxxxxxx

Thanks,

Michael

2

Michael,

What are you trying to do or prevent?

Richard

3

I get that. What is the goal, purpose of doing this?

Richard

4

In any case, further info here, I don’t think it is possible to do this.

Richard

5

We will look at adding a way to do this.

Richard

6

It is something we will consider. It’s on a list.

Richard

7

Hi Richard,

Currently our Apple HTTP Live Streams are generating m3u8’s without the “#EXT-X-ALLOW-CACHE:NO” line.

I’ve been asked by our developers to add the line “#EXT-X-ALLOW-CACHE:NO” to the Wowza generated m3u8 playlist.

They would like to test streams with the EXT-X-ALLOW-CACHE option.

Thanks,

Michael

8

Thanks Richard.

I’ve asked the developers why they need this again.

Will respond with more info once they provide an answer.

9

Heres the response from developers for why

“We want (have to) follow all possible measures to prevent caching by browsers - this option is in the HLS spec precisely for this reason.”