Oh and I think Mr Forrester may have been a tad dishonest (possibly unintentionally) when claiming RTMP and FLV where just like PDF and that anyone can create readers for them. PDF is an ISO standard! I can't find formal standards for RTMP and FLV, did I miss them somewhere? Tried RFC/IETF and ISO, neither have anything. ----
I meant before PDF become a ISO standard, and I didn't mean to compare them as standards but rather proprietary standards which got turned into standards. Of course it was all unintentional :( Sorry for the upset this might have caused :( Ian Forrester This e-mail is: [x] private; [] ask first; [] bloggable Senior Producer, BBC Backstage BC5 C3, Media Village, 201 Wood Lane, London W12 7TP email: [EMAIL PROTECTED] work: +44 (0)2080083965 mob: +44 (0)7711913293 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andy Sent: 22 January 2008 14:02 To: [email protected] Subject: Re: [backstage] RTMP stream URL resolving script On 21/01/2008, Iain Wallace <[EMAIL PROTECTED]> wrote: > Back to RTMP. I was looking at the documentation and some of the code > for RTMP with a view to maybe porting it into this script. It's really > quite nasty! If only there was a nice simple document. Unfortunately it all appears to be reverse engineered. And thus there are parts that are clear guess work (or just plain not defined. Like the randomish data used near the beginning of the handshake). At the risk of going wildly of topic. Is there anywhere that describes all this business with remote procedure calls? Does this mean an RTMP client needs to have a full interpreter for some programming language and isn't allowing unauthenticated remote entities to make function calls on your system a "bad idea". I can think of lots of unfriendly function calls one would not want people to make. > Any extensions to this script from me are likely going to be calls to > apps importing the rtmp.c written for Gnash. PHP calls to a C library? (Sorry been a very long time since I did PHP, many years, ah the good old days ) I was trying to write a little something in Java to basically determine what programs where available, what versions where available and some details about them. Ran into one massive problem. Well 2, one I have more important commitments that come first, and 2: How does one obtain a list of whats on iPlayer without spidering the entire A to Z each time? Is there something one can put in the filter URL parameter that says "only programs added since X"? Or a way of listing more than 6 entries at a time? Oh and I think Mr Forrester may have been a tad dishonest (possibly unintentionally) when claiming RTMP and FLV where just like PDF and that anyone can create readers for them. PDF is an ISO standard! I can't find formal standards for RTMP and FLV, did I miss them somewhere? Tried RFC/IETF and ISO, neither have anything. Also would it be possible to get the stream in a sensible format? If you ever want iPlayer on a mobile use a viable format. For reference Android (Google's Mobile Platform) supports MPEG4 and H.264. How about a stream in one of those formats? The biggest problem with getting iPlayer on exotic devices is the BBC lack of public documentation and no simple way of finding out things that should be documented fully somewhere. As an example here is some questions I had after only a few hours work on some Java code: The versions listed on the HTML page have a date. What timezone is this meant to be in? Am I correct in thinking the month is 0 indexed? And that the order is: Year, Month, Day_Of_Month, Hour, Minutes, Seconds With Hour being expressed using the 24 hour clock? And how precisely is Midnight represented? And which elements are optional in the XML files? Which elements can be repeated? What are the different values of the id field in the element error returned when a stream is invalid? What do these values mean and when do they occur? What are the acceptable characters in the PID? What are the acceptable characters in the Token field? How precisely does the filter argument in the URL for the iPlayer A to Z actually work? It appears to be some kind of query language, what are the names of fields and operators? Some of those would have been answered by the XML Schemes. So if you really are interested in exotic platforms, then maybe telling people what they need to know would help! Andy -- Computers are like air conditioners. Both stop working, if you open windows. -- Adam Heath - Sent via the backstage.bbc.co.uk discussion group. To unsubscribe, please visit http://backstage.bbc.co.uk/archives/2005/01/mailing_list.html. Unofficial list archive: http://www.mail-archive.com/[email protected]/ - Sent via the backstage.bbc.co.uk discussion group. To unsubscribe, please visit http://backstage.bbc.co.uk/archives/2005/01/mailing_list.html. Unofficial list archive: http://www.mail-archive.com/[email protected]/
