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Index › Suggestions & Bugs › Software Bugs › Webcam scanlines

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Webcam scanlines (Read 5065 times)

eRok YaBB Newbies Offline Posts: 5	Webcam scanlines Apr 27^th, 2005, 8:58pm seem to be getting really bad scanline-like breakups in my webcam feeds from both of my camsnow that i switched to 085. Never had this problem with 068. Anyone else getting these and/or know how to fix it? Cameras: iSight Quickcam 4000 Computer: Dual G5 2.5ghz with OSX 10.3.9 thx. eRok
	........ erick r carlson .........&&( ( ( detroitbased.com ) ) )

fry YaBB Moderator Offline Posts: 2623 mass, usa	Re: Webcam scanlines Reply #1 - Apr 28^th, 2005, 2:13am i've seen this though i thought we got rid of it. could you post an image that shows the problem? i suspect that updatePixels() (used on the camera) may be running asynchronously in apple's version of java, which is causing some strange update bugs.

eRok YaBB Newbies Offline Posts: 5	Re: Webcam scanlines Reply #2 - Apr 28^th, 2005, 5:10pm Hey Ben, Thanks for the quick responce. The image tends to break apart any time there is any movement. I have tryed endless combos of camera settings and code. Even in the included video example i get the issue. I posted my pics below. Thanks again, erick http://www.o2creativesolutions.com/processing/webcam/
	........ erick r carlson .........&&( ( ( detroitbased.com ) ) )

flight404 Full Member Offline Posts: 139	Re: Webcam scanlines Reply #3 - Apr 28^th, 2005, 7:06pm Not more forte, but did you try throwing in a delay(10) at the end of the draw loop, or perhaps set the applet's framerate?
	Robert Hodgin {flight404}&&

fry YaBB Moderator Offline Posts: 2623 mass, usa	Re: Webcam scanlines Reply #4 - Apr 28^th, 2005, 7:27pm bummer, that looks to be the same problem as before. it seems that macosx doesn't finish updatePixels() before drawing the video image to the screen, so we wind up with things half updated. i'll make a note in the bug db.

eRok

Re: Webcam scanlines
Reply #5 - Apr 29^th, 2005, 4:46pm

-flight404
Gave it a shot but had no luck. Always seems to have the scanlines. I got another question for ya though, I saw your work at FITC a couple weeks ago. I was using griffin knobs to control my programs in 069 but now in 085 i can no longer get it to communicate directly to my apps. I have to set it to global game mode where i cannot use long click or click and rotate. You solve any of these problems with your griffin knob work?

........ erick r carlson .........&&( ( ( detroitbased.com ) ) )

flight404

Re: Webcam scanlines
Reply #6 - Apr 29^th, 2005, 5:19pm

Since technically, I am not using the Griffin driver, I have not run into these issues. I am using a library written to handle Griffin-to-Processing communication.

I hope to release the libraries soon, but the guy at Griffin that I had dealings with has since left, so now I need to convince the new guys that letting me release the library would help their business, not hurt it. :/

Robert Hodgin {flight404}&&

eRok YaBB Newbies Offline Posts: 5	Re: Webcam scanlines Reply #7 - Apr 29^th, 2005, 6:23pm Let me know if you need a tester for that library for it when you get close. Use the griffin knobs all the time....love those friggin things.
	........ erick r carlson .........&&( ( ( detroitbased.com ) ) )

njetti YaBB Newbies Offline Posts: 24	Re: Webcam scanlines Reply #8 - May 8^th, 2005, 2:28pm I had those scanlines as well and I thought the new video library was not as good as the one in 0068, but then I tried to use another renderer (fry recommended that in another thread) and I got rid of the scanlines. basically: size(320, 320, P3D); try that.

5cameron YaBB Newbies Offline Posts: 8	Re: Webcam scanlines Reply #9 - May 13^th, 2005, 6:13am I did the P3D trick, and tried OPENGL as well.... it chops the video at 45deg instead of horizontally. Although it does seem less frequent. Can't wait for JMyron to work on v9. C

digilee YaBB Newbies Offline Posts: 1	Re: Webcam scanlines Reply #10 - May 14^th, 2005, 10:18am just started playing with processing and video grabs. using the scan line script I have one major problem of when the script, by either mouse click or automatically, any video after this is covered with scanlines. It looks great but not what I want ... example: http://www.rickler.com/barcelona_2005.htm

fry YaBB Moderator Offline Posts: 2623 mass, usa	Re: Webcam scanlines Reply #11 - Jul 28^th, 2005, 4:29pm this may have been fixed in rev 91, but if not, it's filed away here: http://dev.processing.org/bugs/show_bug.cgi?id=114 if anyone on os x could test its current status and add their results to the bug db, that would be helpful too.

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