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Video analysis best practices? (Read 630 times)
PJOnori
Video analysis best practices?
Dec 7th, 2007, 8:44pm  
Hi all, I am relatively new to Processing and so I am looking for guidance in the best method of reading video data for media creation.

I tried the basic route of loading a movie, reading pixel values and outputting a new movie from the data I got. Processing didn't seem to be able to keep up with the video's native framerate, so the derivative video looked something like a time-lapse due to all the dropped frames.

I am starting to think that I will need to export the original movie as an image sequence to ensure that each frame is read. Is that the direction I should be moving towards? If so, are there any examples of best practices for this? I am a bit hesitant to go that way without consulting with more knowledgeable folks because it's going to greatly increase workflow.

Thoughts anyone? Thanks so much.
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waffl
Re: Video analysis best practices?
Reply #1 - Apr 23rd, 2008, 1:35pm  
Arg, I was really hoping someone had responded to this because I am in the same boat. Wondering if anyone has any ideas? Is there a way to say

1) Load the movie
2) Load a frame
3) Load frame's pixels to do some analysis, output results to text file
4) Move to next frame
5) Repeat until done...

I have everything set up fine for a single image, just having trouble figuring out how to approach it with video.

I would appreciate any guidance soooooo much!

thanks!


EDIT:

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Video;action=display;num=1196870672;start=2#2

This thread was very useful! Have a look at reply #2 by polymonkey, worked great for me. to stop when I was done, i added an if statement:

if (movieTime >= 1) {
   exit();
}
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« Last Edit: Apr 25th, 2008, 6:46am by waffl »  
 
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