Dear Bader,
> 1) Splitting a video file to individual jpegs and linking Geo information > to each jpeg. What is the best practice for doing so? I read that recording > a .mov then extracting the exif data is a solution but how would that be > done - I would really love a step-by-step (I read that there is a php that > does this, can you forward that to me?). > If the GPS receiver is connected to the camera - each frame will be geotagged by default. So, if you save a .mov of .jpegs just split it. As an alternative to php there's a program movie2dng ( http://wiki.elphel.com/index.php?title=Movie2dng) but it splits .movs and sets the extension to .jp4. I wrote more about it in the end of the letter, from the command line it'll look like: > movie2dng file.mov > I also have a php version - I'll polish it a bit and upload somewhere. 3) I read in one of the threads about not needing to record a KML file in > order to geotag video frames and it also because it might make the processor > to go over capacity. What would I need to do to disable the KML file? Do I > uncheck geotagging in the Disk writing tool? Or do I uncheck 'Save Exif > Data' in the advanced tab? > With GPS attached to the camera each frame's exif header is geotagged. And, by default, the KML file is not generated. > 4) How do I upgrade the SD Card? Where is the slot? Do I need to actually > take apart the case? > http://wiki.elphel.com/index.php?title=File:10353-10369-assy_blowup.jpeg You'll need to unscrew the top cover only. If there's a compass inside it'll be installed instead of the top CF card - please, careful with the compass cable. Some of the CF cards will not work because of not supporting DMA. We use *SanDisk Extreme III* series - works fine. More about movie2dng and jp4: Instead of jpeg you could try jp4 format. It's a kind of a raw format - that should give better quality - http://wiki.elphel.com/index.php?title=JP4 To split it use: http://wiki.elphel.com/index.php?title=Movie2dng PHP code (well, not really PHP) to convert jp4->dng->jpeg: exec("movie2dng --dng image.jp4"); > exec("dcraw -q 1 -f -c image.dng | cjpeg -quality 100 > image.jpeg"); > "-q 1 -f" - are for VNG 4 color demosaicing. Additional programs are dcraw & cjpeg. If you use (K)Ubuntu: > sudo apt-get install dcraw > sudo apt-get install libjpeg-progs > Best regards, Oleg
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