On Wednesday 05 March 2008 19:30, Herman Robak wrote:Helping the speakers prepare legible slides There should be some kind of service for the speakers to let them see how well their slides survive VGA to DV scan conversion, followed by compression to 320x240 Theora.That's quite easy to test: just switch your resolution to 800x600 or better yet, 640x480.
640x480 on a computer screen has much better contrast than a washy projector screen, and it has about three times the resolution of a low bitrate 320x240 Theora stream. What the presenters will see with your approach is this: http://people.skolelinux.no/herman/vid/dc/slide-legibility_16pt_fullres.png ...but what they need to see is this: http://people.skolelinux.no/herman/vid/dc/slide-legibility_16pt_halfres.png
This not only makes sure, people watching (low quality) live streamscan read the slides, but also people in the audience sitting behindthe third row. (And the same is of course true for live demos insteadof slides.)
Not quite. I have summarised why this isn't so here: http://people.skolelinux.no/herman/vid/dc/slide_legibility.html -- Herman Robak