In article <[email protected]>, Jim web <[email protected]> wrote:
> I have had some more info. I'm just checking what I'm allowed to pass > on! Once that's clear I'll do so. But the people I am talking to may not > know programme-specific details. OK, I can pass this on. Hope it helps, but I confess I don't understand all of it! So it may already be well known. I think the basic idea is that we may need to avoid some old 'legacy' arrangements. The response was... Anything served from akamaihd.net is from our legacy platform. That means Akamai are doing the media segmenting and manifest generation. These services are deprecated. Without giving too much away I can tell you that the 'current' HLS is served from hosts: llnwd.net - Limelight edgesuite.net - Akamai Manifests served from those hosts will look like: #EXTM3U #EXT-X-VERSION:2 ## Created with Unified Streaming Platform(version=1.7.18) # variants #EXT-X-STREAM-INF:BANDWIDTH=1013000,CODECS="mp4a.40.2,avc1.4D401E",RESOLUTI ON=704x396,FRAME-RATE=25 vf_b07nsx00_2e5666d8-dfa3-45e9-a812-315abab948f7.ism.hlsv2-audio=128000-vid eo=827000.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=1800000,CODECS="mp4a.40.2,avc1.64001F",RESOLUTI ON=704x396,FRAME-RATE=50 vf_b07nsx00_2e5666d8-dfa3-45e9-a812-315abab948f7.ism.hlsv2-audio=128000-vid eo=1570000.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=3117000,CODECS="mp4a.40.2,avc1.64001F",RESOLUTI ON=960x540,FRAME-RATE=50 vf_b07nsx00_2e5666d8-dfa3-45e9-a812-315abab948f7.ism.hlsv2-audio=128000-vid eo=2812000.m3u8 #EXT-X-STREAM-INF:BANDWIDTH=5510000,CODECS="mp4a.40.2,avc1.640020",RESOLUTI ON=1280x720,FRAME-RATE=50 vf_b07nsx00_2e5666d8-dfa3-45e9-a812-315abab948f7.ism.hlsv2-audio=128000-vid eo=5070000.m3u8 Which gives you 4 bitrate profiles in an ABR (adaptive bitrate) set. Note the "Created with Unified Streaming Platform" comment which shows we (the BBC) and not Akamai have segmented and packaged the content in-house. -- Electronics http://www.st-and.ac.uk/~www_pa/Scots_Guide/intro/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html _______________________________________________ get_iplayer mailing list [email protected] http://lists.infradead.org/mailman/listinfo/get_iplayer
