Theo Verelst Local Diary Page 78

I've ditched the usual header for the moment, I think it doesn't help much anyhow.
This page is copyrighted by me, and may be read and transferred by any means only as a whole and including the references to me. I guess that's normal, the writer can chose that of course, maybe Ill make some creative commons stuff one day, of course I have made Free and Open Source software and even hardware designs available!

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June 25, 00:51, 2009

More sounds and such, and to balance the other part of the art of media, some more VDPAU well rendered HD fragment screen dumps.

Fortune from Thu Jun 25 01:48:25 CEST 2009:
Hearts will never be practical until they can be made unbreakable.
-- The Wizard of Oz

Studio Tour

Well, it's not officially anything at all but it can easily act as a serious enough studio space, especially for electronic/digital instruments, and monitoring of various types of materials.

I probably will put a movie about it on some video site with place for high definition films.

The Stanford Files

Well, that's a joke, but I mean the CCRMA at university of Stanford (CA) has recently made progress getting a lot of Free and Open Source audio programs compiled and yum- (the Fedora autonatic software installer) downloadable. Luckily also some I couldn't compile easily myself on some systems or which I wasn't aware of.

To mention a few: Aeolus, Jaaa, Qsampler/Linux-Gigasampler (which I had) and lean and not mean recording program.

I've jused Jaaa to analyse the AD converter of the Lexicon converter, which gives a great S/N figure !

Compilability and instability of Ingenuity (and Patchage) remain a problem, though.

The list of audio applications for Fedora 10/64 from CCRMA.

The Kurzweil As Midi Device

In essence, there

VDPAU with denoise, sharpening, and gamma and contrast/brightness correction

When using either deinterlace mode 3 or 4 from the NVIDIA Purevideo special hardware processor being used on linuxto view materials from in this case the Sony HC3 HDV cam (via firewire and the Linux DVgrab tool) the parameters denoise and sharpen can be set using floating point numbers, which can be tuned to the noisyness/graininess and appearent sharpness of the material.

On top of that, because of the filtering and very good hd-video  rendering pipeline, it is profitable to use also not small contrast/brigtness and especially gamma corrections to the attached screen (28 inch bright 1080+ resolution HDMI/DVI) which in turn has slight sharpening and the 'cool' colour program on, and as it is unfortunately on the VDPAU fitted machine with the GF9500GT  NVIDIA card runs on 60 Hz (the cam is PAL 1080/50i, not 60), so that should be compensated for.

Great images and motion though,  in spite of that, and of course the cam not costing a hundred grand and the machine is over 4 years running already and lacks a bit of PCIexpress speed (it in practice doess 1GB/sec of the possible 4, or even 8 the card can do with its 2.0 implementation) and one of the two cores is often near the maximum usage.

Real screendumps ? Not a pixel messed. But the above , like the first, has been corrected to show the same gamma as I had set the NVIDIA X-windows screen controller to when I was watching, and the first has a little more corrected, parallel to how I watched. The middle ones aren't an honest representation because I did use corrections, and they don't appear in the dumped image.

From some years ago with all kinds of compensation, and remember this is an actual frame from a moving picture of this quality, and honestly, apart from the not total perfectness of motion like Purevideo on the quadro card machine can, the impression of the moving HD is mouch better then the single frames, which show no averaging or sligh pixel rounding avering.