Improving Video Streaming With GTK+ 3D Surfaces

[lienmeat]

pretty cool

On my laptop which has an intel 965gm in it, it segfaults on resize, but otherwise it runs well with a 720p video.

I'm running ubuntu 10.10 64 bit. I should note I had to install libgtkglext1 for it to run...you probably will to if you are running ubuntu 10.10...

I'll be posting later when I get home and test it on my ati 4850 with catalyst drivers.

[nevion]

Gtk GL integration and behavior has always been weird. It's one of the reasons I went with Qt (on top of arguably better design / less boiler plate). It's official and integrated code.

I remember the hodgepodge of bindings a few years ago (I think there were at least 2) used to have some problems that some inside Gtk pals said prevented it's inclusion in Gtk itself and the whole situation was very unsavory. Upstream unofficially chose to ignore people who needed openGL or something to that effect (not that this was of malicious intent). This meant you really couldn't count on the GL libraries being well adopted (packages were not available for distro x) and they were buggy. GL itself is tricky if compositing window managers haven't taught you that, it's alot of work to get expected behavior out of all the drivers out there. But not being a well adopted library and buggy wrt end results (considering GL drivers being partially responsible) made using Gtk and openGL a real pain in the but circa 2006, a time I had real work I needed done and I regretted going with Gtk. I doubt I'll willingly go back to Gtk merely because of the shear amount of boiler plate that C++ takes care of for you automatically (sorry folks, I like being productive), but my GL related memories are icing on the cake.

Today I do more complex things and I do them easier, and I thank Qt for enabling. Sorry for being flame bait but I just don't understand why people are still driving Gtk forward anymore. In my eyes it's a waste of the developer's time and most people I know professionally abandoned it or never considered it because of Qt4's existence. What fuels your passion knowing that it's already been done well and is free in all senses?

[pixelpusher]

Hi folks, source is now available:

Source code

[pixelpusher]

Source code released.

Hey folks, the source code has been released:

Source

Regards,
Jose.

[pixelpusher]

Here are my results:

Compositing active: flickering on the rotating cube window. It seems to alternate between a part of my desktop and the cube animation. Although with a second video it alternates between solid black (maybe a part of an open terminal since I use black background?) and the cube animation. Also the alternating background image is always visible flickering even with other windows on top of GtkGLApp.

Without compositing everything works fine apart from the problems mentioned in the beggining.

Extra info:
catalyst drivers 10.11

This seems a common problem with the ATI drivers - with compositing disabled there is no flicker but speed is slow; enabled it seems the underlying graphics system forgets where the textures have been allocated and renders b0rked regions. It doesn't happen with nVidia drivers so (my guess) ATI's drivers aren't tracking XGL contexts properly.

Regards,
Jose.

[Nobu]

Problems observed (if any):
None, as far as playback goes.

GPU vendor, type, core clock speed, onboard / shared memory, bus:
nVidia, GeForce 7100, 350MHz, 128MiB / none, PCIe v1.0

CPU vendor, type speed, system memory:
AMD Athlon64 x2 3600+, 2.0Ghz, 1.5GB

OS version:
Ubuntu 11.04

GUI environment:
xfce4 & built-in compositing

Any extra information you may think is relevant:
It crashes (Segmentation fault) whenever I try to resize the window.
The video I used was a small (320x240) ogg. Anyone have a link to a bigger video I can download?
Edit: Oh yeah, using nouveau driver. ;-)

[3vi1]

Everything runs fine / full-speed here @ 1920x1080:

OS: Kubuntu 11.04 (alpha)
CPU/RAM: Intel Core i7 i980X @2.4Ghz, 6GB RAM
GPU: nVidia GTX 465, nvidia 260.19.21 binary drivers
GUI: KDE4.6 beta 2 (using KWin window manager w/compositing)

For laughs, I also ran it with the Linux F@H client running (12 threads) plus the Windows F@H GPU client under Wine, and it still ran full speed.

[pixelpusher]

Things about the demo (from the author)

Hi folks - thanks so far for the current tests.

First of all, the source will be made available shortly - it needs to be cleaned up a little for legibility, so I will do that as soon as possible.

So far I have noted that ATI cards have some issues, such as flickering and so on.
On nVidia cards (with the proprietary driver) there seems to be no issues at all apart from sync tearing (I have tested with a GT220, 7800GTX and 8600GTS).
As for Intel drivers, more help on these is appreciated!

The application seems to highlight some issues with 3d system/os drivers - it's one of the few ones that uses multiple rendering surfaces that share a GL context. Most apps are OpenGL-monolithic so these problems haven't generally surfaced because of this, but it seems nVidia have been one step ahead here.

Regards,
Jose.

[FedeOmoto]

Everything is fine here except for some constant random black lines in the cube and video windows.

OS: Fedora 13
CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 6000+
GPU: ATI Technologies Inc RS690 [Radeon X1200 Series]

OpenGL vendor string: DRI R300 Project
OpenGL renderer string: Mesa DRI R300 (RS690 791E) 20090101 NO-TCL DRI2
OpenGL version string: 1.5 Mesa 7.8.2

[Again617]

I need a 32 bit version to test on my machine.