Thanks for the suggestions. Most of the solutions I found either couldn't read from a file or were rather complex to set up.
Since this is a one-off, this is what I decided on: 1. ffmpeg to convert from wmv to mov with 1-hour time-stamped segments 2. ffmpeg again to create time-lapse videos where one second is 3 frames 3. Watch the 6 minute videos without blinking (or pausing before blinking) 4. Check the original video when I see someone walk up the stairs to see what it is they actually did Haven't finished watching the videos yet, but it looks very promising. I've noticed that some people in the apartment complex go to work or come home from it very late / early, but none of them so far are the ones that stop by my door. I thought about using imagemagick to compare differences between frames and select the frames with the highest differences between them - but writing the scripts and code to do that would have taken longer than the cumulative hour of watching the videos. Here are the things I looked at: http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=16055 http://www.oz9aec.net/index.php/gstreamer/346-simple-time-lapse-video-with-gtreamer-and-ffmpeg http://einar.slaskete.net/2011/09/05/adding-time-stamp-overlay-to-video-stream-using-ffmpeg/ https://lists.libav.org/pipermail/ffmpeg-user/2006-April/002816.html http://superuser.com/questions/73529/how-to-convert-wmv-to-mp4 http://www.zoneminder.com/wiki/index.php/Documentation AJ ONeal (317) 426-6525 On Wed, Dec 14, 2011 at 10:29 PM, Doran L. "Fozz" Barton <[email protected]>wrote: > On 12/14/2011 10:18 PM, AJ ONeal wrote: > > Problem: > > > > I want to scan a 10 hour video and get a printout of timestamps where the > > light levels darken by about 10 percent (2 percent if you count the > letter > > boxing) as a person steps in front of light source in the distance. > > Have you looked at zoneminder? > > > -- > Doran L. Barton - Hypermoo Inc. - <[email protected]> - 801-520-9875 > Open source consulting, custom development, systems/network administration > "Our wines leave you nothing to hope for. " > -- Seen on the menu of a Swiss restaurant > > > > /* > PLUG: http://plug.org, #utah on irc.freenode.net > Unsubscribe: http://plug.org/mailman/options/plug > Don't fear the penguin. > */ > /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
