- From: Geoff Freed <geoff_freed@wgbh.org>
- Date: Mon, 15 Dec 2008 09:52:27 -0500
- To: John Birch <john.birch@screen.subtitling.com>, Public TTWG List <public-tt@w3.org>
- Message-id: <C56BD95B.46E3%geoff_freed@wgbh.org>
Ah, right- I forgot to mention that the smooth-scroll display in QT player works only on the Mac. On a Windows machine, it will appear as you describe- very difficult to read. If you can play the demo on a Mac, you'll see that it looks much better. I've filed a bug report with Apple over this issue. g. On 12/15/08 9:43 AM, "John Birch" <john.birch@screen.subtitling.com> wrote: Geoff, Thanks very much for posting these... On my player the QT movie shows a very annoying aspect. When it redraws the captions to roll them up, the entire caption region disappears. This gives a very difficult to read presentation. I don't find the QT implementation acceptable but YMMV. :-) [It would seem to me that the correct presentation could have been achieved with two regions.... drawing into each alternately and swapping the z-index.] John John Birch | Screen Subtitling Systems Ltd | Strategic Partnerships Manager Main Line : +44 (0)1473 831700 | Ext : 270 | Direct Dial : +44 (0)1473 834532 Mobile : +44 (0)7919 558380 | Fax : +44 (0)1473 830078 john.birch@screen.subtitling.com | www.screen.subtitling.com <http://www.screen.subtitling.com> The Old Rectory, Claydon Curch Lane, Claydon,Ipswich,Suffolk,IP6 0EQ,United Kingdom See us at Broadcast Video Expo - February 17th - 19th 2009, Earls Court 2, London, Stand number K56 P Before printing, think about the environment ________________________________ From: public-tt-request@w3.org [mailto:public-tt-request@w3.org] On Behalf Of Geoff Freed Sent: 15 December 2008 13:29 To: Public TTWG List Subject: roll-up examples from the 12/12/08 minutes: > SH: GA is going to take a look at providing clearer semantics, JB is going to look at SS's implementations, > SH will look at semantics, GF and AK will send links of demos. Will review where we are at the end of January. here are a few examples of roll-up captions: -- http://ncamftp.wgbh.org/onscreen/demos/upper_third.mov two-row roll-up captions in the upper-third of the screen. the captions are open line-21 (EIA-608) captions. -- http://ncamftp.wgbh.org/onscreen/demos/lower_third.mov three-row roll-up captions in the lower-third of the screen. these captions are also open line-21 (EIA-608) captions. -- http://ncamftp.wgbh.org/onscreen/demos/emergencyCrawl.mov an example of how quicktime has implemented roll-up SCC captions. these are closed captions, so you'll have to turn them on to see them: right click on the video and choose Show Closed Captioning, or open View/Show Closed Captioning. note: the 608 examples display captions that scroll smoothly in the vertical direction, where the top row rolls out of the way as the bottom row rolls in. the QT example shows an implementation slightly different from the 608 examples, where the top row disappears all at once as the bottom row rolls into view. in my view, either are acceptable although the smoother the scroll, the less jarring the text is to read. g. This message may contain confidential and/or privileged information. If you are not the intended recipient you must not use, copy, disclose or take any action based on this message or any information herein. If you have received this message in error, please advise the sender immediately by reply e-mail and delete this message. Thank you for your cooperation. Screen Subtitling Systems Ltd. Registered in England No. 2596832. Registered Office: The Old Rectory, Claydon Church Lane, Claydon, Ipswich, Suffolk, IP6 0EQ
Received on Monday, 15 December 2008 14:53:17 UTC