Processing 1.0 - Processing Discourse - cross-platform video library

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cross-platform video library (Read 38682 times)

Re: cross-platform video library
Reply #30 - Feb 29^th, 2008, 6:18pm

the problem on OSX resides in installing gstreamer itself, which is not a trivial matter (yet). Here there are instructions on how to do it:

http://code.google.com/p/gstreamer-java/wiki/GstreamerOnMacOSX

Unfortunately, it involves compiling from source...
But read the notes in the howto, there could be a new version of gstreamer on macports which might work

ascorbin

Re: cross-platform video library
Reply #31 - Mar 1^st, 2008, 7:01pm

GStreamer & Processing wont work on my mac!

I have a Mac Powerbook 2.2 GHz Intel with 3GB Ram with GeForce 8600M GT 128 MB VRam

I did the following:

install Xcode tools 2.5 (Tiger) from http://developer.apple.com/tools/xcode (register as apple developer)
install MacPorts 1.6.0 (Tiger) from http://www.macports.org

open ' Terminal '
-> export PATH=/opt/local/bin:/opt/local/sbin:$PATH
-> export MANPATH=/opt/local/share/man:$MANPATH
-> sudo port selfupdate
(Macport version is the newest)
-> sudo port install gstreamer
(about 30 packages sucessfully installed)

The GSvideo Processing example gives me: "unsatisfied link, could not find gstreamer..."

download gstreamer-0.10.17.tar from http://gstreamer.freedesktop.org

unpack and navigate with Terminal in folder gstreamer-0.10.17
-> LDFLAGS="-L/usr/local/lib -L/opt/local/lib" CFLAGS="-I/usr/local/include -I/opt/local/include"
-> PKG_CONFIG_PATH="/usr/local/lib/pkgconfig:/opt/local/lib/pkgconfig"
-> ./configure --prefix=/usr/local && make DEPRECATED_CFLAGS="" && sudo make install
(everything fine)

The GSvideo Processing example now generates some errors:
(GSMovie:243): GLib-GObject-WARNING **: cannot register existing type `GstObject'
(GSMovie:243): GLib-GObject-CRITICAL **: g_type_register_static: assertion `parent_type > 0' failed
(GSMovie:243): GStreamer-CRITICAL **: gst_element_register: assertion `g_type_is_a (type, GST_TYPE_ELEMENT)' failed
Exception in thread "Thread-2" java.lang.UnsatisfiedLinkError: Unable to load library 'glib-2.0': dlopen(libglib-2.0.dylib, 1): image not found

at com.sun.jna.NativeLibrary.loadLibrary(NativeLibrary.java:114)

then I tried to install gst-plugins-base-0.10.15 but there was a:"cant find gstreamer-check.pc in pkgconfig path..."

and so on, after more than 3 hours I gave up...

Sad

Re: cross-platform video library
Reply #32 - Mar 1^st, 2008, 9:10pm

Thanks for the feedback.
I don't have a mac myself, so far I'm testing on windows and linux... I'll try to do my best to get some time soon to start testing on mac.

From the errors you are getting, particularly:

Exception in thread "Thread-2" java.lang.UnsatisfiedLinkError: Unable to load library 'glib-2.0': dlopen(libglib-2.0.dylib, 1): image not found

seems to me that there is a problem with the paths. Some component of the library (gsvideo, gstreamer-java o gstreamer itself) is unable to find libglib-2.0.dylib

ac Full Member Offline Posts: 237	Re: cross-platform video library Reply #33 - Mar 1^st, 2008, 9:28pm Another thing, did you try running gst-inspect to see what are the available plugins? If the output doesn't give you any errors, then it probably means that gstreamer is ok, and the problem is either with the java bindings for gstreamer or on gsvideo...

ascorbin Junior Member Offline Posts: 63	Re: cross-platform video library Reply #34 - Mar 1^st, 2008, 10:34pm ok, gst-inspect gives mes: Total count: 3 plugins, 16 features Hm, it seems that GStreamer isnt installed fully and properly, its maybe just the base... Well I dont know lot about Paths, Compiling or even ' Ports ' and stuff some hints? greetings ascorbin

ac Full Member Offline Posts: 237	Re: cross-platform video library Reply #35 - Mar 2^nd, 2008, 1:16am Yeah, there is definitely something wrong. According to the OSX tutorial on the gstreamer-java website, there should be at least 126 plugins present...

ac Full Member Offline Posts: 237	Re: cross-platform video library Reply #36 - Mar 27^th, 2008, 9:08am Hello, I finished a new version of the library, which includes the GSCapture object. Tested only on windows, and definitely not easy to setup, but hopefully the situation will improve soon. More details and download links at: http://codeanticode.wordpress.com/2008/03/27/new-version-of-gsvideo-with-capture-object/

liquid Junior Member Offline Posts: 72	Re: cross-platform video library Reply #37 - Mar 27^th, 2008, 1:24pm wow,great.thxs for the update one question,the Capture size must be 320 x 240 ? otherwise i can't see anything from the screen. if i play with 320x240 it working fine.

ac Full Member Offline Posts: 237	Re: cross-platform video library Reply #38 - Mar 27^th, 2008, 3:51pm I think the maximum resolution depends on your webcam. I have tried 160x120, 320x240 and 640x480 on mine, and works fine.

liquid

Re: cross-platform video library
Reply #39 - Mar 28^th, 2008, 8:36am

sorry to ask again.

it just really weird! the new version seems not very stable,when i testing some HD quicktime movs it always crashed,the window just disappeared . however if i switch it back to the old version(include the GStreamer&jna) everything is fine.

also i upgrade the GStreamer to 0.10.17, is that causing the problem?

ac Full Member Offline Posts: 237	Re: cross-platform video library Reply #40 - Mar 28^th, 2008, 3:47pm I just loaded an HD quicktime movie (the codec is H.264, res. is 1920x800) using the latest version of the library, and works fine. Are you sure that you have installed the plugin for the codec of the file you are trying to open?

Re: cross-platform video library
Reply #41 - Apr 21^st, 2008, 2:03am

I was able to run gsvideo on OSX (the movie class only, not capture yet), after installing the latest version of gstreamer using macports. I added some fixes to gsvideo that allow it to find where the gstreamer libraries get copied to. Here there is more info:

http://codeanticode.wordpress.com/2008/04/20/gsvideo-and-osx/

lwhi

Re: cross-platform video library
Reply #42 - May 6^th, 2008, 2:08pm

Hi - thanks for providing gsvideo :)

I've been messing around with the video playback and it works well on my system (ubuntu studio ... 8.10)

I'm now trying to use the capture facility... using a dvcam under linux. I'm able to do this using a utility called dv4l (http://dv4l.berlios.de/) which routes the firewire dvcam input to /dev/video1....

I was wondering which '/dev/video#' gsvideo requires??

Re: cross-platform video library
Reply #43 - May 6^th, 2008, 10:35pm

Hi, right now the library only reads from /dev/video0

In this blog post (in spanish):

http://lab-pecesito.blogspot.com/2008/04/usando-gsvideo.html

it is explained how to change the order in which devices are loaded so that you can set your camera to /dev/video0

For the next release of gsvideo I'll be adding the option to specify the input device.

lwhi YaBB Newbies Offline Posts: 17	Re: cross-platform video library Reply #44 - May 7^th, 2008, 12:01am Thanks for the info. As I mentioned before, I'm trying to use my digital camcorder as a webcam with processing(+GSvideo), in linux. I've posted about it here (http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Video;action=display;num=1210072258;start=0).

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