[Xerte] Inclusion of close captions onvideofiles anduseofplaylists

Dave Burnett d_b_burnett at hotmail.com
Wed Apr 22 23:58:48 BST 2009 



Yea, an event model is the way to go.

I still have Authorware hangover, where the reception of an xml file does not necessarily mean it is accessible, i.e. a FileIO status check would tell me the file was received, but it still had to be parsed into a usable xml tree.
So I'd loop check until the last element in the xml was available. That way I knew for sure the whole thing was ready to go.

But as Julian mentioned, SendAndLoad must not fire an event until the parsing has already taken place, so no need for loop checks.

 

> Date: Wed, 22 Apr 2009 18:21:38 -0400
> Subject: Re: [Xerte] Inclusion of close captions onvideofiles 	anduseofplaylists
> From: worldradiolabs at gmail.com
> To: xerte at lists.nottingham.ac.uk
> 
> Thanks for the help Dave and Julian, adding an interaction is what I
> figured I'd have to do. I'll have a look at the RSS sample- I should
> have done that before posting.
> 
> 
> 
> On Wed, Apr 22, 2009 at 5:48 PM, Julian Tenney
> <Julian.Tenney at nottingham.ac.uk> wrote:
> > use consecutive interaction icons in a page, with some scripts that load
> > your file, the interaction then waits for an event (onLoad probably, or
> > onSendandLoad) from an icon, then that response exits to do the next thing
> > you want to load the same way, or run the rest of your piece. The
> > interaction below your script acts to halt the flow into the rest of the
> > page until the file has loaded.
> >
> > Look at iconID.sendAndLoad to get xml (ready to use as an xml2Object when
> > returned) or use graphic / movie icons to load media, and listen for the
> > events to manage the flow. Use an iconID on a convenient / sensible icon to
> > load the data. All icons can be asked to sendAndLoad data to a server, and
> > fire an event when it is returned. You handle that event.
> >
> > You can get RSS / flickr / youtube / loads of other 3rd party data this way
> > by reading up on their APIs. You can see sample code in the source for page
> > templates - look at the RSS page model.
> >
> > ________________________________
> > From: xerte-bounces at lists.nottingham.ac.uk on behalf of Dave Burnett
> > Sent: Wed 22/04/2009 21:07
> > To: Xerte list
> > Subject: RE: [Xerte] Inclusion of close captions onvideofiles
> > anduseofplaylists
> >
> >
> >
> > Probably not the most elegant, but could you loop parse for the last element
> > in the xml?
> >
> >
> >> Date: Wed, 22 Apr 2009 14:46:07 -0400
> >> Subject: Re: [Xerte] Inclusion of close captions onvideofiles
> >> anduseofplaylists
> >> From: worldradiolabs at gmail.com
> >> To: xerte at lists.nottingham.ac.uk
> >>
> >> Hi all,
> >>
> >> Captions not always working.
> >>
> >> Thanks Julian for making this timedtext sample- it gave me a great
> >> start for captioning some videos but in testing on the server I ran
> >> into an issue- the captions don't always display if the user starts
> >> the video playing before the xml file is loaded. If I wait for the
> >> video to download first, the captions work fine. On the local machine
> >> I did not run into this issue- perhaps the solution is obvious and
> >> I've overlooked it?
> >>
> >> How may I ensure the XML file loads first?
> >>
> >> Best regards,
> >>
> >> Bill Laakkonen
> >>
> >>
> >>
> >> On Tue, Mar 24, 2009 at 5:47 AM, Julian Tenney
> >> <Julian.Tenney at nottingham.ac.uk> wrote:
> >> > I need to understand more about the timedText standard that the close
> >> > caption files the JW player use are based on. timedText seems to be an
> >> > emerging standard for marking up text with synching information. It's
> >> > attractive because hopefully there will be other tools available that
> >> > can handle the marking up and creation of the files, and possibly
> >> > services such as translation made available by other parties. I built a
> >> > very simple mockup of the basics yesterday:
> >> >
> >> > http://www.nottingham.ac.uk/~cczjrt/timedText.zip
> >> >
> >> > Which shows how to load an xml file (the timedText.xml) and use the
> >> > information in it to set up cue points in the .flv, and then respond to
> >> > those events and show the appropriate piece of text. You'll need to
> >> > reinstall Xerte from the website to make this work as I made a small
> >> > change to the engine to better handle the events from the Movie icon.
> >> >
> >> > The example shows how easy - and simple - this is to do in Xerte. There
> >> > are 8 lines of code.
> >> >
> >> > There's a bit to do to fully support timedText though as it has a number
> >> > of ways of marking up the synching information, and can support multiple
> >> > simulataneous captions, and probably quite a bit more. Maybe this gives
> >> > folk something to start with,
> >> >
> >> > J
> >> >
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: xerte-bounces at lists.nottingham.ac.uk
> >> > [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Johnathan
> >> > Kemp
> >> > Sent: Tuesday, March 24, 2009 9:16 AM
> >> > To: ea at emptech.info; Xerte discussion list
> >> > Subject: RE: [Xerte] Inclusion of close captions onvideofiles
> >> > anduseofplaylists
> >> >
> >> > Regarding a comparison of the accessibility of the JWFLV player as
> >> > compared to the player in Xerte, you may well be right regarding
> >> > keyboard users, I would not claim to be an expert regarding
> >> > accessibility issues. One of the many attractions for me of Xerte are
> >> > the accessibility features that are built in to it.
> >> >
> >> > I have a requirement for taking video footage of interviews and editing
> >> > the footage down into discrete chunks that demonstrate different stages
> >> > of the interview, e.g. introducing yourself, contracting, challenging,
> >> > summarising etc. By using play lists I could re-use the chunks in
> >> > different learning objects, e.g. one object could deliver a complete
> >> > interview, another different examples of contracting, etc.
> >> >
> >> > My current very limited knowledge of Flash and my previous experience of
> >> > using the JWFLV player tended me towards a solution that would enable
> >> > the JWFLV player to be called in Xerte and passed the play list which in
> >> > turn would identify the FLV files and close caption files to include.
> >> > Any solution that provided a similar capability in Xerte would be
> >> > wonderful.
> >> >
> >> > I am in the middle of launching a Company wide VLE based on Moodle at
> >> > the moment. Hopefully when this settles down I will get a chance to look
> >> > at the recent work that Julian has put into enhancing the FLV player in
> >> > Xerte. However I have to stress my Flash skills are limited, though I
> >> > think having now discovered Xerte the case for my getting to know Flash
> >> > is now overwhelming.
> >> >
> >> > Kind regards
> >> >
> >> > Johnathan
> >> >
> >> >
> >> > Johnathan Kemp
> >> > IT Dev. Manager
> >> > Connexions Staffordshire
> >> > www.cxstaffs.co.uk
> >> > 01785 355714
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: xerte-bounces at lists.nottingham.ac.uk
> >> > [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of E.A. Draffan
> >> > Sent: 23 March 2009 20:52
> >> > To: 'Xerte discussion list'
> >> > Subject: RE: [Xerte] Inclusion of close captions on videofiles
> >> > anduseofplaylists
> >> >
> >> > Sorry to ask but are you sure JWPlayer will be as accessible as the
> >> > XERTE option from the point of view of a keyboard users?  We have had to
> >> > add HTML tags to make sure it is accessible in all browsers such as
> >> > Firefox, Opera, Google Chrome and Safari. The keyboard access works in
> >> > Internet Explorer but not always in the other browsers. See example
> >> > http://www.lexdis.org/strategy/62  Our method of handling the difficulty
> >> > is fairly basic but I am not sure if there is another option at the
> >> > moment.  I know folks in Washington University have been looking at the
> >> > same issue.
> >> >
> >> > Best wishes E.A.
> >> >
> >> > Mrs E.A. Draffan
> >> > Learning Societies Lab,
> >> > ECS, University of Southampton,
> >> > Tel +44 (0)23 8059 7246
> >> > http://www.lexdis.ecs.soton.ac.uk
> >> > http://www.emptech.info
> >> >
> >> >
> >> > -----Original Message-----
> >> > From: xerte-bounces at lists.nottingham.ac.uk
> >> > [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
> >> > Sent: 23 March 2009 12:12
> >> > To: Xerte discussion list
> >> > Subject: RE: [Xerte] Inclusion of close captions on video files
> >> > anduseofplaylists
> >> >
> >> > Yes, it could be done, I am sure. I'd be happy to provide some support
> >> > to ayone wanting to have  go at it, but I'm a bit busy to take it on
> >> > myself at the minute. Presumably if you could play FLVs and give them
> >> > captions etc, you woulnd't need the JW player? Just build a similar
> >> > solution in Xerte?
> >> > There would be little point in recreating the JW player, if that's all
> >> > that's required, but if you wanted to integrate more sophisticated FLV
> >> > support with alll the other features of Xerte then it might be worth it.
> >> >
> >> >
> >> >
> >> >
> >> > Ulimately what would be great is to have a 'captionFile' property on the
> >> > Movie icon, point it to a caption file, and then have the movie icon
> >> > fire an onCaption event everytime a new caption point is encountered.
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > From: xerte-bounces at lists.nottingham.ac.uk
> >> > [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Johnathan
> >> > Kemp
> >> > Sent: Monday, March 23, 2009 12:03 PM
> >> > To: Xerte discussion list
> >> > Subject: RE: [Xerte] Inclusion of close captions on video files
> >> > anduseofplaylists
> >> >
> >> >
> >> >
> >> > Hello Julian,
> >> >
> >> >
> >> >
> >> > The JWFLV video player uses an xml configuration file, an xml playlist
> >> > file (which identifies the flv file and the close caption file to play
> >> > for each entry in the playlist) and separate xml close caption files
> >> > which are in a format unique to the JWFLV player. The makers of the
> >> > jwflv player supply a module that can be loaded into subtitle workshop
> >> > (free software) to generate the close captions in the necessary format.
> >> > If you have other software e.g. aegissub (also free, but which I found
> >> > easier to use than subtitle workshop) then you can output close caption
> >> > files in the .ass format. Subtitle workshop can import these and then
> >> > convert them to JWFLV format.
> >> >
> >> >
> >> >
> >> > >From what you say I suspect it would be achievable to call the jwflv
> >> >>player
> >> > from within xerte.
> >> >
> >> >
> >> >
> >> > I have been able to set up both coldfusion code and php code to call the
> >> > flvplayer and pass it the necessary parameters, so I guess it is now
> >> > down to my improving my action scripting and understanding of Xerte.
> >> >
> >> >
> >> >
> >> > I am looking forward to your forthcoming online tutorial on Friday 3rd.
> >> > I may not be able to be there live, but there's always the recording :-)
> >> >
> >> >
> >> >
> >> > Kind regards
> >> >
> >> >
> >> >
> >> > Johnathan
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > Johnathan Kemp
> >> > IT Dev. Manager
> >> > Connexions Staffordshire
> >> > www.cxstaffs.co.uk <http://www.cxstaffs.co.uk/>
> >> > 01785 355714
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> >
> >> > ________________________________
> >> >
> >> > From: xerte-bounces at lists.nottingham.ac.uk
> >> > [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Julian Tenney
> >> > Sent: 20 March 2009 10:27
> >> > To: Xerte discussion list
> >> > Subject: RE: [Xerte] Inclusion of close captions on video files and
> >> > useofplaylists
> >> >
> >> > The play list is just an xml file, so Xerte could easily enough load it
> >> > and create a list of items, that when clicked loaded and flv into the
> >> > player.
> >> >
> >> >
> >> >
> >> > Synching up the display of captions to the playback of the video would
> >> > mean tracking the current playhead time in the video and showing the
> >> > caption. I assume that the caption file is also xml, something like
> >> > this:
> >> >
> >> >
> >> >
> >> > <captions>
> >> >
> >> >  <caption time="00:12"><![CDATA[Here is a caption</caption>
> >> >
> >> > </captions>
> >> >
> >> >
> >> >
> >> > Which is all the inforamtion you'd need to also support them,
> >> >
> >> >
> >> >
> >> > From: xerte-bounces at lists.nottingham.ac.uk
> >> > [mailto:xerte-bounces at lists.nottingham.ac.uk] On Behalf Of Johnathan
> >> > Kemp
> >> > Sent: Thursday, March 19, 2009 5:14 PM
> >> > To: xerte at lists.nottingham.ac.uk
> >> > Subject: [Xerte] Inclusion of close captions on video files and use
> >> > ofplaylists
> >> >
> >> >
> >> >
> >> > Prior to looking at Xerte I have been experimenting with the jwflv
> >> > player, which is free for non-commercial use and has a modest licence
> >> > fee for commercial use.
> >> >
> >> >
> >> >
> >> > This is flash based and allows for the playing of flv files, with
> >> > support for the use of playlists and close caption files.
> >> >
> >> >
> >> >
> >> > Is there any support within Xerte for the use of playlists or close
> >> > caption files?
> >> >
> >> >
> >> >
> >> > If not has anyone looked at the possibility of calling the jwflv player
> >> > from within Xerte?
> >> >
> >> >
> >> >
> >> > Kind regards
> >> >
> >> >
> >> >
> >> > Johnathan
> >> >
> >> >
> >> >
> >> > Johnathan Kemp
> >> > IT Dev. Manager
> >> > Connexions Staffordshire
> >> > www.cxstaffs.co.uk <http://www.cxstaffs.co.uk/>
> >> > 01785 355714
> >> >
> >> >
> >> >
> >> >
> >> >
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