--- Forwarded Message from eric eubank <[log in to unmask]> --- >In-Reply-To: <[log in to unmask]> >References: <[log in to unmask]> >Date: Thu, 10 Nov 2005 12:10:24 -0600 >To: Language Learning and Technology International Information Forum <[log in to unmask]> >From: eric eubank <[log in to unmask]> >Subject: Re: #8082 Streaming QT: text tracks (!) Hi - QT text tracks will not stream - they have to be loaded via progressive download. But you can combine streaming media tracks with text tracks. And that resulting movie must be served via regular webserver, over http. That is, you cannot serve it directly from the QT/Darwin Streaming Server. One method of creating a combined, streaming/QT text movie begins with saving a reference movie from the streaming track to your local computer. Enter the streaming URL in QuickTime Player Pro and then save that movie (as self-contained). The very small, resulting movie is just a pointer to the actual streaming asset. e.g., Open URL (cmd-U, ctrl-U) in QuickTime Player rtsp://quicktime.laits.utexas.edu/itsaud/qe-0-01/Unit03part2.mov and save as self-contained => a streaming reference movie. A copied text track can then be added to that streaming reference mov in QuickTime Pro: in text track movie => rewind select all, copy. In streaming reference movie => rewind/"add scaled" .. a composite movie can be saved from the combined tracks (again, saving as self-contained). One would assume that the text track is the same length as the streaming track, to begin with; otherwise subtitles and streaming audio/video would be out of sync. So in that case, no need for "add scaled" .. just "add." In any case, to access the "add scaled" command, in QT Player Pro/MacOSX, hold down the option key, while pulling down the "Edit" menu. After the composite movie is saved, it can be served from any old webserver. Streaming and progressive download tracks will play together, assuming that enough of the text track can download prior to the streaming track beginning. --- Here's an example of a (very long - 5hrs+) streaming audio track with text tracks: http://www.laits.utexas.edu/cid/qtl/all_stream_sub.qtl There's another text track in this movie (a chapter track): it also has to be downloaded first. So you can combine all sorts of tracks and serve the resulting movie via http; but only hinted tracks can be served directly from QTSS/DSS. --- fwiw: * with very long streaming tracks (guesstimate: an hour or so), text tracks will drift out of sync. * the above qt text/streaming audio movie was added because we discovered in QT7 that very long progressive dl qt/text movies crashed QT player and/or browser with QT plugin. Which was why we converted the audio to streaming. While this works OK (except for the drifting out of sync later in mov), obviously, best performance will result from desktop playback. So for very long movs, we've also added the option of downloading qt/text movs for local playback. * Quite a few changes in QT behavior were evident in QT7; most resulted in problems appearing that hadn't existed in QT6. The general conclusion is that, for some more esoteric QT uses, QT7 is subject to more bugs (some of which have been worked out in subsequent updates). The bottom line: increased, cross-platform testing is necessary with some such solutions in QT7. -- Eric Eubank <[log in to unmask]> Liberal Arts Instructional Technology Services University of Texas at Austin At 11:57 AM -0500 11/10/05, LLTI-Editor wrote: >--- Forwarded Message from Jorg Waltje <[log in to unmask]> --- > >>Date: Wed, 09 Nov 2005 21:33:46 -0500 >>From: Jorg Waltje <[log in to unmask]> >>Reply-To: Jorg Waltje <[log in to unmask]> >>To: Language Learning and Technology International Information Forum ><[log in to unmask]> >>Subject: Streaming QT: text tracks (!) >>In-Reply-To: <[log in to unmask]> >>References: <[log in to unmask]> > > >Dear Listlers: > >Another streaming problem encountered by yours truly: > >We have been using $E3Textation$E4 to subtitle some Quicktime files of German >clips. We serve them over an OS X streaming server. When we add the text >track (subtitle) however, it does not show up, although audio/video streams >fine. When I try to redo the whole file so that the text track has a >hinted track added to it, the whole file will not play. > >Que pasa?? It runs just fine from the computer HD -- Has anyone tried out >QT with text tracks over a streaming server, please come to my rescue. > >Best regards, Jorg > >--------------------- >Dr. Jorg Waltje >Associate Professor >Director LRC >Ohio University >Gordy Hall 17 D >Athens, Ohio 45701 (USA) > >Ph: (740) 593-2748 >Fax: (740) 593-0729 >--------------------- > > > >*********************************************** > LLTI is a service of IALLT, the International Association for >Language Learning, and The Consortium for Language Teaching and >Learning (http://consortium.dartmouth.edu). >Join IALLT at http://iallt.org. >Otmar Foelsche, LLTI-Editor ([log in to unmask]) >***********************************************