Hi Simon,<br><br><div class="gmail_quote">On Wed, Apr 29, 2009 at 5:06 PM, <span dir="ltr"><<a href="mailto:simon@mungewell.org">simon@mungewell.org</a>></span> wrote:<br><div> </div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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The only question I have (and this is not a put down) is why?<br>
</blockquote><div><br>I was fairly confident someone would see the heavy processing flaw :-)<br> <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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Any encoding on the video image is going to reduce the quality of the<br>
barcode image and thus make it a little harder to read and apart from<br>
being cool not many people can read 2D barcodes by eye.<br>
</blockquote><div><br>This is true, I'm waiting for the open standard to settle before getting my brain 2D barcode enabled.<br><br>The reason I chose a QR Code (or any other barcode) is that it's machine readable even in blurry and twisted orientations, making it quite robust on encoded video. Turns out I can record at a resolution lower than it can be normally read. When I enlarge the extracted png to 2x size it still works. Plus QuickMark on Symbian S60 makes a funny noise when it captures that appeals the child in me. ;-)<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Personally I would think encoding the NMEA string into APRS beacons (or<br>
the like) onto the audio track would be the way to go. That way it could<br>
be done without any processing power in the car - just a GPS, APRS encoder<br>
(can be a simple as a PIC or OpenTracker) and a camcorder with a line/mic<br>
input.<br>
</blockquote><div><br>Yes, definitely audio is the least processor-intensive way of getting a synchronised input. I was mostly faffing. I've seen FSK used, can APRS be recorded onto an audio track then? <br><br> </div>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
If you are going to process the video you could render the GPS data as a<br>
human readable graphic overlay (think speedometer, compass heading,<br>
lat/long, etc) onto the video... but why not include a 2D barcode too.<br>
</blockquote><div><br>I should be able to do that stuff, but VLC didn't seem to offer much in the way of text overlay, just image overlay. I suppose I could make text into an image with an alpha channel. Anyway, this isn't really a big deal for me, just an interesting exercise in faffing.<br>
<br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Anyway 'way cool',<br>
Simon.</blockquote><div><br>Thanks :-) <br><br></div></div><br>Ben<br><br>-- <br><a href="mailto:ben@crouchingbadger.com">ben@crouchingbadger.com</a> | <a href="http://crouchingbadger.com">http://crouchingbadger.com</a><br>