Processing 1.0 - Processing Discourse - Display local and remote web cam inputs

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Display local and remote web cam inputs (Read 1120 times)

billy

Display local and remote web cam inputs
May 2^nd, 2006, 11:00am

Hi there,

I am just starting on Processing and I'd like to display the input from a local web cam (easy) alongside the input from a remote web cam (that's the tricky bit): something like MSN Messenger where you can see yourself and the remote person on the same screen.

I did find a posting that suggests loading an image from a Web server (the remote web cam has to somehow upload an image to the Web server as often as possible): http://processing.org/discourse/yabb_beta/YaBB.cgi?board=VideoCamera;action=display;num=1115177308

But I think this approach will only show a new image every 10 seconds or so. I'd like something that would refresh more often.

Any suggestions?

fjen

Re: Display local and remote web cam inputs
Reply #1 - May 2^nd, 2006, 12:39pm

hi billy,

you might want to look into QTSS. the processing-video-lib is built around quicktime-for-java and therefore it should be able to open qt-streams (although i guess it never has been tested).

so .. the (theoretical) way to set this up would be to have both webcams post to the qtss and then read the video-feeds via processing from there.

i'm curious about your results ...

best,
F

( ah .. and it is available for other systems than os-x as well )

billy

Re: Display local and remote web cam inputs
Reply #2 - May 3^rd, 2006, 11:20am

Hi Fjen,

thanks for your response. That is an interesting idea, but that seems quite complicated for what I am trying to achieve (well, using streaming servers and untested features all seem a bit scary at this stage, really

A friend mentioned to me today that the Oculus Web cams can FTP Motion JPEGs up to a Web server. Now, that sounds like an easy option

But is there a way to display motion JPEGs in Processing?? Googling "motion jpeg site:processing.org" returns nothing. Any idea??

Otherwise, I'll start looking at QTSS.

Cheers,

Billy

fjen

Re: Display local and remote web cam inputs
Reply #3 - May 3^rd, 2006, 12:08pm

are you referring to: http://www.intlweb.com/

the specs there say you can either upload sequential jpgs or one time-laps movie (which will be updated locally and the uploaded en block).

this might be an option, but it's not going to be much faster than what you can do with processing/php .. i have to look it up, but there was an discussion about how to encode a jpeg inside processing and post that to php. will post it here ..

best,
F

fjen God Member Offline Posts: 965	Re: Display local and remote web cam inputs Reply #4 - May 3^rd, 2006, 1:17pm ha! look what shiffman just blogged: upload best, F

seltar

Re: Display local and remote web cam inputs
Reply #5 - May 3^rd, 2006, 3:02pm

I did just what shiffman did quite a while ago

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=VideoCamera;action=display;num=1117194066;start=0#0
http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Syntax;action=display;num=1138221586

The second is the best, i guess i had no idea what i was doing the first time Tongue

hope it might help

-seltar

I'm bored, therefore I program
http://seltar.org > seltar's special place
http://snippet.seltar.org > seltar's snippet palace
http://libraries.seltar.org > seltar's libraries

fjen God Member Offline Posts: 965	Re: Display local and remote web cam inputs Reply #6 - May 3^rd, 2006, 6:25pm seltar, be careful with that php .. you never know where $img was set (GET / POST / ...) . rather use $_FILES['userfile']['name'] instead. see: php.net - handling files uploads best, F

JosephDuchesne Ex Member	Re: Display local and remote web cam inputs Reply #7 - May 4^th, 2006, 12:29am Here's a program of mine that does exactly that. Requires MyGUI library http://rafb.net/paste/results/F0J70222.html It doesn't use an external server (except to bounce you your IP address)

billy

Re: Display local and remote web cam inputs
Reply #8 - May 4^th, 2006, 11:26am

Thanks to all for your suggestions. It is most helpful.

Joseph, your program seems to do exactly what I am looking for.

I am trying to run it, but it fails on line:

gui = new MyGUI(this);

with error:

java.lang.NullPointerException
at java.io.DataInputStream.readInt(Unknown Source)

(it doesn't even give me a line number!).

I've installed MyGUI version 8 from: http://www.mkv25.net/MyGUI/

Are you using the same version? Is there something obvious that I am missing (it's the first time I try to use MyGUI)?

Cheers,

Billy

JosephDuchesne Ex Member	Re: Display local and remote web cam inputs Reply #9 - May 4^th, 2006, 12:19pm I'm using version 10: http://www.mkv25.net/MyGUI/MyGUI_0010.zip It runs on the current latest version of processing (0114) although it was originally coded on 0104.

erinc YaBB Newbies Offline Posts: 2	Re: Display local and remote web cam inputs Reply #10 - Jun 14^th, 2006, 3:41pm Quote: Here's a program of mine that does exactly that. Requires MyGUI library http://rafb.net/paste/results/F0J70222.html It doesn't use an external server (except to bounce you your IP address) Hi Joseph The link is not working. Would you give another link or send the program my mail. Thanks.

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