bpa wrote: 
> Programmes are identified by the vpid (not pid) but vpid can be a brand,
> a channel and lots of other things (check out BBC programme ontology - 
> http://www.bbc.co.uk/ontologies

I must admit, I hadn't realised there was so much documentation
available. Nevertheless, I can't work out what the difference between a
pid and a vpid is, although I've seen similar hash-looking things
applied to brands, episodes, images, etc. The "Programme Ontology" seems
to call them "POs".

I agree with you that encouraging use of these APIs and then pulling the
rug out again a few years later is pretty shoddy behaviour. I think it's
a result of too many managers (all of whom have to come up with new
imperatives to justify their position) and too little money to let
people quietly doing a good job get on with it. I'm probably
oversimplifying it (you've referred to new platforms making existing
systems obsolete, for example).

> To convert a vpid to a playable URL can vary over time, the source and
> age (i.e. archive or recent) of the programs but for most normal
> programs it is a case of wrapping the vpid into an mtis URL.

If I look at the web page for a particular episode of a particular
programme (say the "Gramophone" episode of 50 Things That Made the
Modern Economy: http://www.bbc.co.uk/programmes/p04x6xg6), what is the
"p04x6xg6"? pid? vpid? The JSON version of this page has no other
identifying information, which is why I assumed this must be used by
iPlayer (Triode's, not the official apps) to construct the playable URL
(but I haven't looked at iPlayer to investigate). Do iPlayer / Extras
(when data's available!) get a fully-formed URL from somewhere based on
more than just this hash?

> There is - it is called Nitro but mere mortals cannot use it
> https://developer.bbc.co.uk/nitro

We spoke about Nitro further up this topic a month or so ago. I meant to
say there was no current way to get a Squeezebox to play anything from a
couple of weeks ago. I was envisaging a text box, very much like the
"Tune In URL" on the LMS Radio submenu that just took the pid / vpid (or
extracted it from a longer URL to make copy & paste easier) discovered
from the web browser as a quick and dirty method of playing any given
programme. I've listened to "50 Things...", as it happens, because this
programme has an mp3 url published due to its availability as a podcast,
but how can I play "Just a Minute" from 4 April...?


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