JohnB wrote: > This business of what bit rate is available seems rather odd. > > On Radio 3 and Radio 4 (the only two I have looked at) the BBC iPlayer > flash client indicates that the stream is 320 kbps, HDS from the > limelight server. That usually (but not always) tallies with the > bandwidth I measure with a utility. > > I've just looked at what seems to be available for HLS and DASH for > Radio 3, using the BBC's AOD availability link and then the > mediaselector links given: > > The DASH stream has two "Adaption Sets" - one giving a min/max of > 128/320 kbps (perhaps for UK users?) and one giving a min/max of 48/96 > kbps (perhaps for non-UK users?) > > But the HLS stream only has 128 kbps available. > > (Forgive me if I am talking nonsense as I am not very knowledgeable and > am feeling my way.)
I think the strategy is a bit mixed up but I see the underlying principles as follows. 1. Radio 3 gets better quality compared to other station. 2. HLS is intended for Apple iPad/iOS assumed to be mobile (e.g 3g) so possibly restricted bandwidth (i.e. minimise chance of rebuffering) and limited audio quality and so no need for high quality but there is choice of available quality sbr_high, sbr_med, sbr_low anmd sbr_vlow - when checking bandwidth check which setting is used in the URL. 3. HDS (played by Flash player) and RTMP (also played by Flash) so user is expected to have a high speed internet connection and possibly connected to a high quality audio system. 4. DASH is new and so settings are still being experimented - BBC hope to have automatic rate adjustment. Offering better qaulity will move users over and then after a few montsh like BBC with new AAC stream a few years ago - they'll drop the bandwidth. DASH live stream is as you said - non UK only 48/96 whereas UK get two higher rate. However Listen Again (aod) Dash for non UK offers 320k through browser interface but only 48k for RTMP. HDS listen again is not offered ( I think it used to be) Has HDS for Listen Again also gone for UK browser users ? ------------------------------------------------------------------------ bpa's Profile: http://forums.slimdevices.com/member.php?userid=1806 View this thread: http://forums.slimdevices.com/showthread.php?t=53229 _______________________________________________ plugins mailing list plugins@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/plugins
