WWDC2004 Session 710

Transcript

Kind: captions Language: en hi everybody thank you very much for coming this is a an experiment for us this is a full QA session and we've seen it work really really well at other conferences before I sort of describe a little bit about the the session itself I'm going to describe what it isn't so this is not the QuickTime feedback forum the QuickTime feedback forum is on Friday at 5:00 and that's where you know you can ask all the questions and the you know sort of we'd love the product to do this this session is more intended for okay we understand that the product doesn't do this what's a good way around that or as a content provider we're trying to get this accomplished what are the potholes along that path what are the best strategies and we are so lucky to have all of these folks both on the panel and in the audience there's clearly you know dozens and dozens of experts you know I see many people that we we know quite well as experts in the field so my hope is that the way that this works is you'll come up and definitely want to use the microphone so that it's recorded accurately and ask the question and then we'll sort of take a second to figure out who can probably best answer the question there may be times when it's somebody in the audience and we've seen these sessions go completely haywire within the audience is answering the audience's questions and the panelists just sort of disappear about kidding but we'll start it off by having I'll pass the mic down so that each of these folks can introduce themselves and their general area of expertise so that then the questions can be sort of formulated based on who's here there are we don't have you know sort of people from the Pro applications product group so you know in-depth questions on Final Cut Pro may be a little bit difficult but within this sort of spectrum and the people that we do have in the audience hopefully we can answer a lot of your questions and get a good dialogue going on and if there aren't a lot of questions then it'll end quickly and that's that so my email address should come up here and never never mind so if you've got feedback on how this might work better give it to me and we'll sort of see if this session is worth doing over and over again we've got a lot of these folks typically in the labs but to have them all available at a fixed time here is something that we're really happy to try out so with that I'll hand it over to Ryan Lynch Ryan Lynch I'm in quicktime product marketing and I handle everything there is to handle with us say QuickTime streaming server to embedding in webpages and fun things like live stage so that's what I do I'm Eric blonde PA I spent a long time working at Apple on quick times interactive stuff and now I'm on my own doing a variety of things interactivity and mixing media I'm really into taking lots of different kinds of media and putting into the same movie and it's also pretty fun to do things that require a lot of resources out of the server a lot of getting data in and out and that's all fun stuff so that's me I'm John Healy with Akamai Technologies Akamai is the content delivery partner for Apple we deliver a lot of Apple streaming content as well as a broad variety of HTTP content as well work closely with Ryan Glen and Dennis in their organisations in terms of getting apples content out on the web more effectively hi I'm Alec Henry from MTV Networks you can Ireland and my speciality is a lot of interactivity stuff and now with QuickTime mainly focusing on two-and-a-half and 3G video mobile contents I'm Steve Cooley I'm a roadie for Apple and my specialty is HTML stupid web tricks and using the QuickTime Player as a code of Swiss Army knife or QuickTime content I am Ben Wagner and I'm a compression nerd hi I'm mark Griffiths from flourish we design and develop a lot of interactive QuickTime particularly with live stage media players that sort of thing I am Michael Schaff do interactivity with live stage a lot of front-end and back-end stuff and loud bright shoes hi I'm giving us you know and I'm the way I am I am the voice between the developers and the programmers of last days I have to speak with those guys went to translate in French then to the developers you know make to me the village all right so let's have our first question excellent go ahead Adam will Omni on video networks we're moving our file system over to that we can be compatible with Europe and Asia and everywhere else and our question is about encoding media paths and alias atoms and QuickTime files is there a recommended practice for encoding the inter code strings in alias atoms utf-8 utf-16 double byte or if this is confusing to you guys it is to us any takers who's the taker can you speak a little bit more closely to the microphone so that we can hear the question again oh you can yes we're we're writing our own QuickTime files the alias atoms that point to media files within the QuickTime wrapper or normally encoded in a file system dependent fashion we're moving our entire file system over to Unicode and I'm curious what the best way is to put Unicode strings into alias atom media paths utf-8 utf-16 double byte something else it will be utf-8 but it's not supported yet I don't believe we have just introduced in Tiger UTF support for user data atoms and we're moving towards that throughout the system but right now you really can't do it what you need to do is contact Apple engineering and get it on the seed list for the next rivet of the file format because we're ahead in the same direction you are but we're not there yet we have to release it in August as part of our release four of our media server software so if utf-8 is the way to go that's the way we'll proceed that's the way to go and one of the big things is you'll be using a different kind of instead of using the Mac language coding you'll use the three character ISO encoding but you'll only use the least significant 5 bits because you're going to pack them all into a 32 bit field or something ok and if we want more information on this the best way is to get on a tiger seed list or yeah contact me and I'll get you in touch with the right people okay I'm sorry your name again Steve goolie goolie at Apple calm thank you thanks hello this question might be for Ryan is there a workaround or trick to launching multiple instances of QuickTime broadcaster to on a single machine I heard somebody mention in one of the sessions that they were doing that so that you can encode multiple streams on a single machine QuickTime 6 broadcaster using the same DV source for both instances so actually launching multiple streams I'm not live yet so launching multiple streams or multiple instances of broadcaster is not a supported activity so it's not something that well I was asking for the workaround exactly exactly so who has experience doing that nobody has experience doing that there are some alternative apps that we haven't tested fully but that are capable of doing multiple streams Steven you want to comment what's that at the Wirecast right I've experimented with that a little bit but the the gentleman from University of Wisconsin presented earlier this morning mentioned on their excerpt cluster they were doing that somehow I should probably ask him I didn't have time to ask him I thought somebody else here might know also you want to do you want to know how to try it yeah you figured that out so you just move it and then reinstall is that how you doing yeah you just copy it and name it something else but can they both access the same levy source so they both can't they both can't access the same DV source but they can do many many audio streams okay we didn't even that access the same DV so yeah unfortunately for DV that doesn't work but for analog or any other mechanisms getting it is because their deafness that's a beating thing with QuickTime that we need to resolve so they must be using it just to because they have these tuner cards or different source so there yeah if you put in multiple of those Miglia tuner cards in there it'll work I see yeah and then does anyone have any recommendations for products that for live webcasting that tightly integrate with PowerPoint or keynote that are out there today that that could you know put slides up on viewer screens next to the live stream and when a user in the studio say clicks on a different slide in keynote or PowerPoint it sends that command down the flip the slide so there's a gentleman from the University of Sydney that wrote an app that looked to be tremendous for doing that uh-huh pardon doesn't that involve export the stuff out of PowerPoint it's not editing it in PowerPoint I don't think well everything I've seen you know that does anything with PowerPoint integration tends to require exporting the slide deck into some other format and posting it on a web server either into like PNG or JPEG z-- or something or just images then it sends URL flip commands but what I was really yeah what I was really hoping for though was something that would besides just converting it and sending those script commands if it could actually monitor a person running the PowerPoint or keynote deck and see what slide they're on so that the person running the encoder doesn't have to follow along and know what slide you know URL flip to send Brees does that it monitors PowerPoint but isn't it it's also flash spark video only it too isn't it isn't it doesn't only do flash spark video it doesn't do QuickTime encoding right right at something that would work for QuickTime I know of some solutions for windows media to do it but I'm looking for something with QuickTime there's the product that the 20% free media guys have the tarantella baja streak Astrium that's that's ruled out because it requires a proprietary player to be downloaded and installed on all viewers machines a proprietary server and licensing fees for simultaneous viewers it's just it's too expensive and impractical to deploy to thousands of users in an enterprise their future is also a little shaky because you don't know one possible solution would be to use something like channel storm where you've got one video feed on the speaker one video feed on the PowerPoint presentation so the guy who's queueing things up knows which graphic to bring up and he's got his own graphics cube so I think you could do it that way with challenged one do you mean where you take the PowerPoint as one of the video sources right you you aim a camera at the PowerPoint screen and you're the guy who's in charge of sending out the the images looks and sees what's there looks through his queue of images and queues up the one you want which sounds like what you want to do there's no script there's an actual human being involved well we have other alternatives and if I may answer that I have an alternative for that we export the powerpoints in JPEGs many JPEGs we asked for the person that will hold the the representation should give us the PowerPoint to export in JPEGs and imports as JPEGs and then we have a list of JPEGs and their suits and then we play with that he gives us at a kind of fridge but if you have a very long presentation it can be tricky and so it's a workaround with it okay sure what's it called if you still channels for all you can apply it generously okay great I'll maybe I'll check with you after thank you and if you pop me an e-mail I'll try and get to that Sydney University of Sydney app when it shows up and we can all look at it a little bit more closely I heard about it two hours ago so I can know much about it yet next question yes I have been working in a workflow system where I have a server centralized encoder and I use cleaner for that and we've helped of AppleScript I get my workflow to work and I have 300 students that post their videos and you know cleaner is getting shaky and have many problems of bugs and well I have to question is what's happening you know the bug about the time watch folder there is a watch folder feature and there is a time you probably clean them at encoding time this is because in time is shorter than the film itself many times I can't think or finish maybe you have that expensive the second question is do you have an alternative I'm looking for something not too expensive but something that works with QuickTime and Mac platform yeah cleaners has no apparent engineering going on a more I heard a couple engineers assign cleaner as a product but is nothing much evidence at a discreet in the actual board progress for over a year now the Matic product the two compression tools right now that we're seeing progress on on the Mac are of the compressor we also have source and squeeze fours but announced and I'm not sure the status of Apple scripting is in there but I believe is entered beta and up creating contact that they probably and they're very responsive about that kind of stuff and give you some ideas on that this is also a compression master from pop choir choir out of Sweden and I don't know that they do automation either but they both support watch holders in compression and all the kind of stuff so they're kind of both working to fill that cleaner niche and both are a lot more stable today thank you good answer and if when you ask a question if you could give your name and company that be also helpful I'm Norman whole solid work for such a public broadcaster you need the name it good it's good you wouldn't understand anyway right I don't just and with with using Final Cut Pro to do do editing in a we using ingest machines to do the digitizing to Final Cut Pro injection machines it's a little crazy we use those big sophisticated application we think with people who don't understand what they're doing and they tend to change things screw things up we need a very simple QuickTime application just to digitize photo JPEG 75% whatever preferably then to transcode it to 35% can't find anything out there that will just do a simple job everything will grab it but we can't give any time code in nothing will give us time codes as well and we need it in time code of course anybody any ideas does it put a stop invisible folder product from back among the video vision days get a pretty good standalone QuickTime capture tool that work with time correctly with the telecast hereby reveal my age and I think there's a little red in some fashion selling some kind of troll not sure if they fill the Mac os10 version though but if I checked out pipeline digital and we've looked at the pop wire people of a confessional but if did ingest master or something but it's nothing to do fell to jpg or yeah but the compression after they've integrated our own codec supports they don't actually support arbitrary QuickTime codecs that said I thought that motion JPEG they support internal motion but not photo JPEG we used to date cards technique cards always use photo JPEG image brilliance it's much better than overblowing for fuel Ducati wanting motion JPEG instead it's 42 and gives us four fields so for really like 95% of all applications could try to capture video you're better off the motion JPEG we did them and it was for the small bit mates that we need it was Rivage so we use photo JPEG it will do what make you feel better you can make I mean at worst motion JPEG file I have about another 10 percent higher data rate for the same quality of photo JPEG we put in single field mode so you could probably make motion JPEG work for you so it's a little bit of tweaking ok thanks hey I was going to say doesn't squeeze ingest Eevee yeah and then they do timecode squeeze can do live capture off DV and yeah the new version squeezed for my cable do timecode I haven't haven't tried that yet but they'll be an obvious feature is your source always be be or do you have other programs it differed it yeah it definitely does not support digital it's a DV only solution squeeze do you need to capture it in higher resolution than DV because you could use a converter that there are some higher-end converters about $2,000 from the likes of Promax that do a serial and rs-422 serial between the converter and the digi beta deck and they take the component or SDI input converted all the TV output with timecode and then yes it's lower quality but transcoding digitated to deviate morally reprehensible though that's it on the question okay I've got a question sorry okay this is a real quick one this is an easy one right I've got some instructional content that I'd like to have the end user let's say it's a drill and practice thing and there's a scorekeeper on you know on the screen and they close out the QuickTime movie and I'd like to have it so that when they come back that score still there and they can continue on it's an easy one right this is an easy place to run through this question run and money hold the micro close to site and I don't want to use any server-side stuff okay that's too way too complicated come on we got to keep this simple another legislator well totally soaked where they've loved the component to be able to sell cookies to be able to save some XML value to the user for this table we made that available to table to our developers and we are currently description at all to be able to upload that onto their server so soon you hopefully will be able to do it I mean you do have the variant 4.50 and so we can do it from within you I mean we provide you the ocean in two dollars so you can angle subsea so pretty well you can the Presidium acknowledge and applaud is just the index just mod the only thing that you cannot do is have the I mean you can send your user to a web page to download installer and inside the component how about a related question when are we going to see that component on the QuickTime component page ads on the description is going to be in the future in the future when in the future that's there's no me that's not a question another question that is said a crystal ball but absent you know I know just a sweet hot rod Oh on a related thing there is a share the piece of shareware that allows you to do live streams with slides synchronized together called slides now so if you go to slide now.com you can check it out it's like 25 bucks super simple excellent good answer and I know you said you didn't want to use the server but with XML file exchange you really can send it or a JavaScript that will submit a form so you know this this is a problem that has been solved you can apply the traditional value can't right now there's no way to make a QuickTime movie write something to the users disk and and there are reasons for that but you can send it send a JavaScript submit or or mail to or or an XML a list exchanged with the server which is the way you can do it now you know as long as the steps being put in a webpage the cookie question can be handle by the browser right question on the right eye rich carton Penn State University I've got somebody who wants to undertake a project that wants to put multiple live streams in layers in a movie and the streams would come to the front triggered by flash buttons also embedded in a layer in the movie and we're sort of trying to get an idea of how many streams we can ask the ask click time to handle within how many layers can quicktime handle four streams and I guess that's about it mark do you want to take that not particularly p.m. so whether you have an old imitation of number of streaming track that you can have inside a QuickTime movie like turbo flash track text track and so on you have no limitation at all you have a mutation in term of the bandwidth you know if you try to send five stream at one megabits/second to be too big so it will depends on your data way then and bandwidth on the client side what you can do you can create or flash in flash interface with set of streaming track and you know stop one start the next one stop one start and stop the next one and switch them you will have a little delay between the switch these are live stream you can do that with live stream live stream and that assume assume assume gigabit bandwidth yeah it has been done years ago with live stage and it was with like quit and five I believe so it's possible yes just not too much bandwidth yeah I like the idea of gigabit bandwidth where do you live yeah in a university of course that's the right answer next question I have basically two questions one question is this flesh supports streaming QuickTime streaming format not at all can one explain why that what's the is a reason they are playing the same we play like Microsoft they want to to build their own streaming server so things like that that that question probably is good better at flash forward with it it's also go to the next door I'm having a hard time a compress impact for under 256 because in Denmark where I come from impact 4 is a 256 is our ADSL lowest denominator and the impact for is doing a great job between 280 up to 512 and 800 but what's the problem now what should I be aware are you going for real-time streaming or progressive download a progressive download a real-time streaming also both suppose okay check out compression master compression master is a good to pass in peg to CBR mode which QuickTime itself lacks so you can typically get substantially better compression efficiency out of that especially for low bitrate streaming applications this clip x encoders a single pass only and both squeeze and compression master support to pass VTR including progressive download and a book can offer because it's to pass substantially better quality the QuickTime encoder itself can I mean you've got to be the QuickTime in pick for encoder it's it's a free way you get to start with but you want to do we make really high any code stuff duplicate using squeeze or compression master the Mac thank you the other thing might be to also look at the content itself and if there's a way to crop to the area of interest and maximize the compression on the area of the image that's important you know there's some savings there as well but here is the environment ultimate size involved where I have no expect and nobody expects working at the same time so I have to respect their journalists they do all kinds of understand I understand and of course as h.264 comes onto the market you'll see a substantial improvement in either the amount of data that you're saving for the same image or increasing the size of the image that you're compressing I Josh Glaser would be art Institute's we have a large number of campuses across the country not only art Institute's but also other college brands 67 two locations we're building an infrastructure to do streaming media across all the campuses to you know which is typical I think of a lot of companies trying to get information from the top down and bottom up I'm wondering if you know we found some solutions on the windows side but we're also a Big Mac shop as well so I'm wondering if there's any solutions you guys know of in in content management of QuickTime content you know we're at at the local level you know you're able to quickly browse through content you know I know that you know if you guys are familiar with Beamer acres or some of the other solutions out there that that allow this type of functionality basically you have a local streaming server at at each location within the organization and then it's basically a web type interface but they're pre-built you know type solution is extensible for the content management piece so I'm wondering if you guys know of any out there if you like be brick be brick will work with a QuickTime encoded in pic for files it will yeah already but network deployed if you mix prettier in pacer compile cut and drop it on there okay and you're good to go okay dirty ID bricks that's fine we don't yet we're in the process of kind of researching and building a project together we're also looking at it from a digital signage point of view - for our galleries and different you know a student areas as well to broadcast content so yeah you know that would be more full screen type stuff but yeah be Berger scale is great from standard F down to like Yousaf and don't have a high debt solution in place but as long as your signage is only going to be only going to be a standard F it's quite consistent I mean get great sound quality at like six to eight megabits ok perfect - and I'll scale down like you do tell a bit make 4k it right there they have mpeg-1 mpeg-2 mpeg-4 solutions and if you go to their website all the live streams that they're doing right now are completely ISO compliant playback fine and QuickTime Player and the other ISO players they're doing live events right now from dr. Ballard expedition in the Black Sea or something yeah I wasn't aware of the support concerns yeah great really you have some thank you hello Dave Berggren from soma media I have a question about QuickTime chapter tracks we use them exclusively in our applications we actually use try-works a shell and if you use chapter tracks inside a QuickTime you can actually have a lot of chapter tracks and you can have scrolling capability in QuickTime but if you embed it into a web page I think and definitely in tribe works you have the you're limited you can't scroll so whatever the resolution of your screen is that's how many chapter tracks you can you can display there a way to actually have that feature inside of an embedded environment like tribe works or on the web Eric you've been voted in do you want to come in that's probably because I'm somewhat of both silly with tribe works lately but I don't work on I show I can only think about workarounds ways to get the chapter data out yourself and then build lists there we've done that but a lot of times it's more efficient just to you the chapter track way quick time quick tow absolutely today really really easy and it's a great feature that scrolling capability that's in quick time but I'm wondering if tribe works if there's a way to control it within from like if tribes can do something or if they're to actually if the future is actually what have you talked with tribe works engineering about this yes but it's kind of on the backburner and I don't even know if it's possible so that's why I'm asking you if it's impossible well we'll pass it down there but I'd be happy to help talk to you with them about it okay I don't know about tribe works but with respect to the QuickTime plug-in I would file it as a bug with our bug reporter and see if we can't get it fixed to the next round okay last answer on that I have built something similar it doesn't have quite the same question that you have but basically processes over a chapter track and then I have a small piece that is a flash track that I can just drop into any QuickTime movie and then what the flash track is doing is auto-generating movie clips so I can scroll that space so for me it's better functionality than what is done in QuickTime because I can have it looked the way that I want I can have the color scheme yatta yatta yatta that I that I want to have it's not a very difficult flash task nor difficult QuickTime test it can be done once and then apply to many projects okay thank you very much I'm having somewhat Carolina State University almost like is jointed over here earlier he is having a question of broadcasting life events where the speaker wants to do PowerPoint you wanted a classic talking head the PowerPoint is some stuff at the bottom in the screen there's a company called Envivio they're a member of the insa consortium as example and they do have a hardware Pike that is will do exactly that it is about $15,000 but it's called forecaster life and you literally take your PC plug it into the back of this device it has it takes VGA and encodes a VGA stream and/or video stream and audit you know in our screen also index the content in real time and what generates out is an h.264 stream now of course I have had a chance to actually test this with the pre-release of apples product but I would imagine that it would work quite well if it's Envivio basic probably uses the bits binary format for writings right which i believe is not been announced for QuickTime ok it's not supported today and that's that's one things I want to clarify here is that is that going to be something that you will eventually be able to support it will the video has a plugin for quicktime player on windows today and they've shown actually demoed at Macworld 2003 we had a alf of their mac version that every ship that yet oh yes I've got it running semester ok so yes if you have that which can do bits that's a plug-in but unless somehow looking at the Apple to start include that as part of the component download program well obviously I'll be at the feedback forum on Friday yeah ok I probably mentioned this but yeah I'm already aware of the issues and there is a course licensee issue involved in this as well yeah we're their product but it is say it does exactly what they tell it say that it will do is pretty amazing hi I'm Amy I work at Apple I just wanted to address your question about h.264 in the tiger seed yes I know I know it's not a complete I'm not know right you guys have heard me saying that a million times so far but I just wanted to let you know that the way that it's in there is not like all the other QuickTime codecs at this point in time so yes I know elegant oh yes okay so to make sure that was clear because it probably won't work with us say for internal consumption you should use it while you're showering yeah I just mean that it won't if you put another app on top of QuickTime I won't show up no I know nevermind I was trying to get to my desktop machines so I could actually try it out but never mind but anyway it is a very cool product it does seem to work great suggestion hello my Coconino Community College in Flagstaff Arizona I get a couple questions for you the first one you may or may not have an answer to and I was wondering with the hardware requirements or the projected hardware hardware requirements of h.264 playback are going to be I mean so clearly then hey it's depending on on the data rate of the stream that's to be decoded right so we've shown on the dual g58 megabit 1980 1080 1920 1080 at 24 v and then in steve's demo you saw a variety of data rate so there's no set requirement yesterday we showed it so so the short answer is we don't have that data yet because we're not done yet so we'll have to get back to you with the final answer with that but yesterday in our session about it we showed on an iBook and it was a 1 gigahertz before I book that you could play back I think it was 960 by 5 something because it was sort of letterbox and that data rate was 5 mega so it wasn't 5 megabits it was one and a half I think so anyway that's just an idea of what we have now and we're still working on it so we don't have a final answer but we'll get back and just another comment on that there are about 60 companies that have either pre announced or announced that they're developing encoders decoders all sorts of tools based on 264 and you know some of the decodes hardware requirements are down to the you know sort of subs 100 milliwatts chips for you know mobile device decode so the codec given its availability can also scale on its processor on the processor requirements for decode minimum very broad range reach to 64 or a cell phone or better alright my next question is I want to capture h.263 content into a QuickTime file I want to know if that's doable yeah juice extreme codecs have been a quick saying for years now since I QuickTime for link yeah so just because the codec you're doing look at em broadcaster I get to go but I haven't had any success and actually capturing it to disk because that's what are you trying to make a dot MOV file with 3 content are you creating pretty much and yeah yeah it works I mean before or sorts of 3 an mpeg-4 kit I mean in pay for came out that was the dominant streaming codec in QuickTime so I mean all the live broadcast live including stuff was almost all 263 you know until a few years ago so it's been been there's been working fine for a long time yeah you mentioned that you tried it and it didn't work so that I'd be a little piece of information that would help us what do you know coming out of Tandberg 6000 system just as a default stream that's viewable in QuickTime can is the McGinty one of the interesting things is that Tandberg themselves although they've developed the QuickTime streaming component actually didn't know how to make it work and when they did their testing all they ever did was did it from a web page that was actually logged on to the Tandberg 6000 itself and that works fine I've actually just I mean literally last week managed to get it streaming from a codec so a QuickTime streaming server and I'm actually going to Oslo in a few weeks time to talk to them about the 264 component because if you've got an e series and sound like 6000 just be glad you've been able to actually capture those strings here just as flavor just display them we can we can actually and I mean you what you can do is you can you can capture it by saved by just taking it out of the cache and maybe Oh once it's strange or machine you take out of the cache but we've not managed to actually say that as an ongoing stream but I'm actually I'm going to also in a few uh end of July to actually talk to their engineers I mean I'll you are not talking afterwards but you know the main reason I'm going is because on the new e-series 6000 they've already got 264 embedded and and you can go from six thousand to six thousand of these to 64 so I'm going to talk to them about saying well hey why don't you stream the two six four as well so thank you thank you Gary Shainberg from BT Steve Egbert Brigham Young University let's say that I've got some movies on the web progressive movies and I want to prevent the smart guys from downloading and ripping off my content so that means that you wouldn't be able to pull it into VLC and bypass all the wires bright stuff do you think you guys can think of a solution to prevent people from ripping off my content lots of takers here whose first you want to take a stab at it first you look in the back of the book QuickTime for the web there's a couple cheapo tools while they're free one of them will basically going to make a reference movie copy protect it and compress the header and then take the header out of your source movies so that it's a box of rocks it's no longer a playable movie and you've got a reference movie the points to your web and some data on your web that if they copy it to their disk doesn't do anything because your movie points to the web and if that was the correct answer what is Jacques in extending on the same question if I want to project content on an intranet would you do the same stuff streaming live streaming or downloadable content well live streaming is inherently copy protected it unless somebody's really really smart because we don't keep a copy of it on the data okay not could be protected preventing access and authorized access I think well let's remedy that this way you can create an interactive QuickTime movie with wild sprite and create some kind of password that we send out to that others and check we want to something else as as good an idea as that would be that actually won't be secured because right now QuickTime only supports HTTP GET in which case everything is visible on the on the stack which means that the password would be actually visible and that would be a bad thing yes this is another Club for the the totally hip component that actually allows you to encrypt what would go on the line and so you could still see it but you wouldn't be able to tell what the data is the other possibility is to still using wired sprites but get clever and build your own encryption scheme and and then upload that in which case you need a flipside on the server side to actually decrypt it then there's probably a lot more details there but but ultimately you have to look at what your audience is expecting because it really does get down to an end user question what kind of environment are you delivering content to and what kind of user experience are they willing to go through well there is a nifty little feature of QuickTime streaming server that gives you QT access files so you can require our name and password although there is the same problem it is a get and it is clear text over over your network that's another possibility also I'm sure there's this neat little thing with Akamai you can do and they have a if you have an account with them they will allow you to tokenize your a your references to the movies so that you have to have a valid it validated username and password that isn't done through clear text you can do and generate a link dynamically so that might be something you'd want to talk to this guy with about that one there the last so shouldn't we be weather if your major put the movie inside an HTML you can have an SSL page before that will request for the password and then you have the whole you know the whole schema to be able to protect your content because they will not see the kuta movie on that page before you can do the security check when we did the our is our annual results which which has to go to a close audience in the u.s. we did exactly that you know we just created an HTML environment linked it to a database made people register with their username and password and then took them to an SSL page and SSL protected HTML page and ultimately yes if someone once they logged in once they could obviously find the path to the movie but you wouldn't get that unless you'd logged in in the first place so Glenn put some money in the meter please go ahead hi there brand Frederick from the certified general account Association up in British Columbia Canada part of this has been hit already but just to kind of round up the solution we are going to be in a situation where we've got lecturers and speakers that are presenting and we kind of want and the most efficient read cheap but still workable solution of being able to switch between a video feed of the speaker and also their slide presentation so I guess kind of like what was being done last year with the WWDC material that DVDs well if you aren't really cheap and easy you get a scan converter you get a camera put through a video switch but that's a lot of good so if you really realize even easy that's trivial to do and actually give you pretty good quality you can live with having the video signal the analog kind of scan converter in reason would that be good enough what about digital options well well well you either want to keep it easy to consider actually a cheap cheap in these years the s-video out of the PowerBook yeah the red you know that easier than using a scan convert we we do that all the time where we have a PowerPoint presentation we just want to take it full screen as a video source in the live webcast and we used to use a scan converter but we found that the s-video out of the PowerBook produces cleaner looking results than our scan converter and doesn't have the same problems with putting artificial black margins around the image that scan converters often do so I mean that that works pretty well if you use any standard video switcher I have to switch between live cameras and and that fee it's obvious video outputs being better than a lot of the lorentz can governor's I sort of imagined like a VGA to SPI thing that's probably more than you want to pay it surprisingly so I mean even slides like this with text is small like that blue type translate quite well down to life size of the 240 by 180 which would be appropriate for like a 35 to 40 kilobit per second stream for dialogue that actually works no that sounds perfect back at the obviously she was like a keynote version like to which do all that stuff project it's picky about because I have absolutely no idea if it was get a lot about example but yeah I got a chatty V and kido feel like as a to do crazy kids it gotta get together and some kind of journey chachi kind of rainy but definitely second that I have a question has anyone does anyone know of any quick on live encoding solution that works at sizes larger than 320 by 240 that produces good quality results at sizes well I realized that you can set broadcaster to a size larger but it's actually scaling up from a half resolution source there are number products to do a light and take forestry and I'll be quick Thai compatible with higher frame sizes and that are they software or they like a climb yeah picus and Envivio both have them is also the freeware in pic for IP product has a live encoder built into it which I believe can go up to six variable rate and they're live and today I was eighty interlace as well on the pre-processing side pretty sure the Nvidia product does and I blew the deccan suppose it does as well I'm not sure but anything for IP ok because for whatever is you can't compile out on a Mac tonight I was like I'm not smart I do that it's a there if it's all open source there it's like a tune the way through never fool busily linkers it like that but yeah book looking Buda Texas products can handle us and I believe also some hardware and pay for work stuff out there to explain to the job as well all right interesting idea in a Southwest and it'll be like doing it on a there'll be a billion two six four switches fourth yeah I want to run it on power book for remote live webcast I've also had some experience rich garden from Penn State I did a one second there's a little bit more to that answer in QuickTime broadcaster that free little app does go up to 640 480 as well it goes up to 720 well 720 whatever you wanted yeah that's what that's what I would be be I have done a internet to event streaming it out best I could do with the top-of-the-line g5 was about 7 megabits per second but that was a full screen high quality audio I still got some blockiness it just wouldn't encode all the way up nope to kind of respond to what you were saying QuickTime broadcaster lets you set an output of 640 by 480 if you want but if you look at the results it looks like a 320 by 240 that's been doubled in size and there are no interlacing artifacts present in it okay and I know it's not deinterlacing in real-time what it's actually doing is asking quick you know it's a source level in the background it's throwing out the fields it's almost certainly using the the fast no DV codec which saves a quarter screen a single field right so I'll starting with a quarter resolution original that you know size larger than 320 240 it doesn't really look any better I had a perfect solution for that will be the QuickTime has got the hook down inside her the high quality and single field flags on decode which you can do a quick time player we can't go to the encoder if we just had access to those exact boxes and so I've noticed is that live channel and our cast both seemed bound by that same limitation they both seemed to produce the same results as QuickTime six broadcaster would when you set them larger than 300 to 40 you probably is probably you have to find a Prada be decoded for real-time or simply says the ability to override with the default study for real-time is and because I'm on our computer that the DV codec and even even if our book could be is like you know six as a real-time Cheryl energy for know how insanely X real-time energy five so the power there to do because I'm suppose when we see everything that Final Cut Pro can do in real time on you know you can a nice chief or you got to think that it should be able to do it what would happen is to compress any two times the bitrate now I've tried that and you get less and less compression artifacts and the result that there's no higher resolution to be seen yeah the decoder itself solely handed off a quarter screen resolution bitmap to the encoder or digital processing engine so totally like if you took a 320 by 240 in Photoshop and doubled in size and compressed it with high quality JPEG it in fewer artifacts but it's not any sharper duly noted I think you know obviously there are the hardware solutions that are emerging on the market from a lot of different companies and you know the V bricks and the dye kisses and all those sort of companies but you know that it may be a good one that if we'll take it to the feedback forum as well if you don't because the points well-taken thank you give two questions I have some really bad examples with analog switching using scientific PowerPoint switching that I have in my lap at really how not to do it is every gauges of samples they're also on our website don't look at them they're impossible to view and that's one of the challenges I had I'm Brian schooler check to Health Canada national microbiology lab where that of the CDC of Canada this is something that I did quite a bit of and discovered everything not to do so this has been really helpful I guess my so my point is that I found some challenges the analog to switcher and I've been looking at wire cats and live channel ready to talk to the software without using it I've actually complained around last couple days of wire cast I don't know if anybody's experienced it seems to have a lot more support for fruits around for lower thirds for being able to bring up text you can some respects replace the PowerPoint that simple text or items I don't know I guess that's my first point who's played with it what does it look like on the user's end and secondly is there a resource make it point me to for a rule of thumb for compressions a bit of witch doctor II I have ten users across Canada and my director says ok how what's the pipe how many people can view the stream can you point me to a good resource which would just put suspected bandwidth how many users could be able to view the stream as I would tell locking up if anyone has any yeah I've been playing the White Castle it does look quite good actually because you can switch between multiple sources that's quite nice sort of 3d DB effects as well where it moves presenter down into a little screen in the court a bit much like the keynote speeches here you can do bringing your slides in playing around trying to export out of keynote as a QuickTime and then bring you that in and you can kind of step through the slides from your keynote as a QuickTime in one window while you or your video source appears in the other and it does seem to be working quite well yet I seem to have the same limitations on the the video size of the the sources are coming from but it is quite nice that you can just plug in a whole load of iSight cameras and switch between them quite easily so let's cool on the Bitterroot frame you know it's a really calculator calculator got out pretty all you need to really do the details of it is to do and how many megabits and paint be available you know and with a bit rate of extreme is going to be multiplied together earning a theoretical value and then you know chop maybe 25% off that you know for overhead and just general you know to click it to God so yes that's pretty straightforward badly one problem that was you from QuickTime QuickTime laser mics measure things in kilobytes per second and it takes a kilobyte 1,024 bytes while prematurely else the world measures things in kilobits where K equals 1000 instead of a thousand 24 so you can sometimes have to like kind of shuffle some numbers on in the background mo there are a lot of tools that they're like compression master and squeeze which make QuickTime files but present it in terms of actual to kilobit values that can make it a little bit easier when you're offering stuff or for you know streaming views the impact for component will show a teal also in kilobits as well but a fortune if you open the file up in cyclic time player it will give it to you in K and a lot of people got capice thinking that K values actually in K by ok bits this way K bytes good point I think it looks like the last question