# Adaptive bitrate of LL-HLS **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [October 12, 2020, 6:53am UTC](https://community.wowza.com/t/adaptive-bitrate-of-ll-hls/92113 "2020-10-12T06:53:43Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![jesper\_lai](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jesper\_lai](https://community.wowza.com/u/jesper_lai)\ **Post date:** [October 12, 2020, 6:53am UTC](https://community.wowza.com/t/adaptive-bitrate-of-ll-hls/92113/1 "2020-10-12T06:53:43Z")
Hi, I was wondering why adaptive bitrate of LL-HLS is not working based on my setting. █ Here’s Flash Media Encoder setting URL: rtmp://172.16.46.143:1935/live Stream: myStream █ SMIL file ![image](https://us1.discourse-cdn.com/flex002/uploads/wowza1/original/1X/34a00c5244860a059c18606dbf7419ee2eebe66e.png) █ Also, enable the transcoder \> Transrate (Default) including source, 720p, 360p, 160p █ On Incoming Stream page, can see Default Instance (_definst_) including streams above streaming is working under [https://172.16.46.143/live/myStream/playlist.m3u8](https://172.16.46.143/live/myStream/playlist.m3u8) replacing “myStream” with “myStream\_160p”, “myStream\_360p”, “myStream\_720p” are also working but not working with [http://172.16.46.143:1935/live/myStream/smil:myStream.smil/playlist.m3u8](http://172.16.46.143:1935/live/myStream/smil:myStream.smil/playlist.m3u8) first, downloading m3u8 file is passed “172.16.46.143:1935/live/myStream/smil:myStream.smil/playlist.m3u8” 2nd, dowloading chunk got 404 error “172.16.46.143:1935/live/myStream/smil:myStream.smil/chunklist\_w877383523\_b744100\_sleng.m3u8” Is anything wrong with current setting? my test player is “akamai players/hlsjs” thanks ---
**Author:** ![jesper\_lai](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jesper\_lai](https://community.wowza.com/u/jesper_lai)\ **Post date:** [October 12, 2020, 10:13am UTC](https://community.wowza.com/t/adaptive-bitrate-of-ll-hls/92113/2 "2020-10-12T10:13:08Z")
after correct the myStream\_source bitrate which is the same as myStream\_720p now I got another error HTTPStreamerAdapterCupertinoStreamer.onPlaylist: Rendition is not supported [live/myStream/smil:myStream.smil/chunklist\_w665802848\_b744100\_sleng.m3u8]: AUDIOVIDEO PlaylistDelegate.getManifest[app[live] stream[myStream\_720p] format[CMAF], type[AUDIOVIDEO]]: Manifest doesn’t exist: live/myStream/smil:myStream.smil/chunklist\_w665802848\_b744100\_sleng.m3u8 ---
**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\ **Post date:** [October 12, 2020, 2:44pm UTC](https://community.wowza.com/t/adaptive-bitrate-of-ll-hls/92113/3 "2020-10-12T14:44:44Z")
Welcome to our community @jesper_lai. 👋 What is the audio codec you are using? Usually we check to make sure your stream names and bitrates/resolutions match for all the renditions, which they look like they do. So, if it is saying rendition not supported, it can potentially be the codecs, usually the audio codec. Is it aac? If it’s working in wowza test players or vlc and not in the akamai player, we’ll need a support ticket to run some tests to see why not. ---
**Author:** ![jesper\_lai](https://avatars.discourse-cdn.com/v4/letter/j/e480ec/32.png) [@jesper\_lai](https://community.wowza.com/u/jesper_lai)\ **Post date:** [October 14, 2020, 7:58am UTC](https://community.wowza.com/t/adaptive-bitrate-of-ll-hls/92113/4 "2020-10-14T07:58:18Z")
many thanks, finally, the issue was fix automatically and I did nothing changed excluding correct the birate btw, may I know while using LL-HLS, the shortest latency is just about 1.5s ~ 3s? ![image](https://us1.discourse-cdn.com/flex002/uploads/wowza1/original/1X/1e91bbadf48ead053499f0442fc7cdcb5712087a.png) or… it’s possible to have shorter latency after changing something else? thanks ---
**Author:** ![Rose\_Power-Wowza\_Com](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/rose_power-wowza_com/32/431_2.png) [@Rose\_Power-Wowza\_Com](https://community.wowza.com/u/Rose_Power-Wowza_Com)\ **Post date:** [October 22, 2020, 5:55pm UTC](https://community.wowza.com/t/adaptive-bitrate-of-ll-hls/92113/5 "2020-10-22T17:55:24Z")
Oh so sorry, missed your reply, I didn’t get a notification. I can tell you what we are consistently seeing on average with our extensive testing is 2 to 2.5 seconds. If you need anything lower, you might want to consider WebRTC? It also depends on if you are using a CDN or not since that is another potential latency add-on before it reaches the viewer.