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jkelty
kiosk video resolution issue
on Oct 8, 2005 at 5:30:44 pm

We created touchscreen kiosk programs, graphics and video, that display on a 1280 x 1024 screen. The 720 x 480 videos of course do not use up much of that screen, and the client is not happy with the size at which they display. If stretched, the videos display unacceptable breakup and look posterized, particularly on moves or dissolves. We have tried several export protocols from the FCP timeline, including uncompressed, but not suprisingly, these don't work. What, if anything, can be done to increase the resolution of the videos to make them play larger on the screen and still remain crisp? The videos were produced in DV.

Thanks from a compression novice.



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Charles Simonson
Re: kiosk video resolution issue
on Oct 12, 2005 at 11:58:03 pm

Increase the resolution? Not much can be done unfortunately. One thing would be to output to tape and then output from there to SDI into an expensive scaling box and then recapture. But even most of those boxes don't do a much better job than software. One thing you could try is to deinterlace the content when encoding. For computer display, a deinterlaced (progressive) source looks much better for playback, although deinterlacing technically forces you to lose resolution. About the only other thing I can think of would be to encode to MPEG-2 interlaced at a very high bitrate that your computer can still playback, and then play the file in a player (like VLC) that can blend the two fields and scale to fullscreen. I seriously doubt that is possible for your situation though.

Best bet would be to build the Kiosk interface at 640x480 or 800x600, and set the display to the same resolution and then play the video back at its natural size.


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jkelty
Re: kiosk video resolution issue
on Oct 13, 2005 at 2:53:24 pm

Thank you so much for taking the time to try to help. We'll be smarter next time.





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Ben Waggoner
Re: kiosk video resolution issue
on Oct 21, 2005 at 5:14:57 pm

Well, if he's using Compressor 2, he can use the Shake-derived optical flow resampling stuff for upsampling. They do a surprisingly good job if you don't mind spending a few hours per minute of source to process them :). Set the resize filter to "Best (Statistical Prediction)." And if coming from interlaced source, definitely use the "Best (Motion Compensated)" deinterlacing mode.


My Book: http://www.benwaggoner.com/books.htm
Squeeze and ProCoder tutorials: http://www.classondemand.net/benwaggoner/
Compression Class at Stanford: http://www.digitalmediaacademy.org/compression.html


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