Comments on: GLGraphics 0.99 released

By: ac

ac — Sat, 02 Jun 2012 17:31:47 +0000

Hi, glad to know you find the library useful, the idea is to update GLGraphics to work with Processing 2.0.

By: Noel

Noel — Fri, 01 Jun 2012 21:59:58 +0000

Hi Andrés! Love the library, I’ve used it in a bunch of projects and it’s a real time saver. I was wondering what the current plans were for processing 2.0 integration. Will there be similar features built into the processing core or are there any plans to update this library int he future?

By: ac

ac — Sun, 22 Jan 2012 02:24:55 +0000

Hello. For the stuttering/flickering problem, I’d recommend re-encoding your video with a codec that goes along with gstreamer more nicely. For example, I was just doing some tests using an mp4 video encoded with h264, and it would consistently drop frames. I re-encoded it as an avi file with the xvid codec and the playback improved significantly.

About the audio: if the video has an audio track that is encoded with a codec that gstreamer understands, then it will try to play the audio back. If you don’t want the audio to be heard, you can just call setVolume(0), or remove the audio track from your video file.

By: franco

franco — Wed, 18 Jan 2012 13:00:52 +0000

Oh… I’ve allready tried that. If I set delPixelsWhenBufferFull(true); then looks like drop frames.
But no matters how much frames I set in the buffer, the applet count 0 buffered frames.
Luckilly I´ve found if I slowdown the framerate the flickering is reduced. But at 12fps, so…
Any Idea?
Second one: I’ve tried to capture the sttutering and write it to a file (to show you), with the MovieMaker example code. As default, write an Theora video that I can´t play (I used to play fine ogg videos). So I’ve tried to change the codec, but gives me a message saying I need some GStreamer encoder plugins. Need I install the GStreamer bins?
Last one: Why the Movie example plays audio? Is that right?

By: ac

ac — Wed, 18 Jan 2012 03:13:51 +0000

Not sure really… Using setPixelBufferSize() and delPixelsWhenBufferFull() might have an effect:

…
tex = new GLTexture(this);
movie.setPixelDest(tex);

// Sets a frame buffer of size 5 and configures GLGraphics
// to drop frames when the buffer reaches its max capacity
tex.setPixelBufferSize(5);
tex.delPixelsWhenBufferFull(true);
movie.loop();
…

By: franco

franco — Mon, 16 Jan 2012 13:25:37 +0000

Well, I’ve missed the updates!
Sadly, I’m having the same issue with version 1.0 of both libraries.
Do you have any idea about that? Maybe some bad config on the nvidia settings?

i7 – Quadro FX 880M – win7 64
P5 1.5.1 – GSV 1.0 – GLG 1.0

By: ac

ac — Fri, 13 Jan 2012 02:07:01 +0000

Oops, sorry for missing the version info! Anyways, for both GSVideo and GLGraphics there are 1.0 releases available online:

http://gsvideo.sourceforge.net/
http://glgraphics.sourceforge.net/

Could you check if the problem is still present when you update?

By: franco

franco — Thu, 12 Jan 2012 01:13:32 +0000

Oh, sure, is over Win7 64.
The specs are at first line: P5 1.5.1 – GSVideo 0.9 – GLGraphics 0.99

By: ac

ac — Wed, 11 Jan 2012 13:59:34 +0000

What version of the libraries (GSVideo/GLGraphics) are you using, and on what platform?

By: kroeisviq

kroeisviq — Mon, 09 Jan 2012 09:21:24 +0000

P5 1.5.1 – GSVideo 0.9 – GLGraphics 0.99

I’m trying to run the GL examples included in the GSVideo package (Capture, HDmovie, Pipeline), and I have an ugly stuttering. I mean, playing a movie or capturing from webcam framerate is ok, but seems like a bad inverse telecine. Visually seems ike shooting the previous frame. Ej: frames 1,2,1,3,2,4,3,5,4…and so on.
Any recomendation?