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Old 24th February 2008, 18:17   #1  |  Link
bratao
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Schrodinger release the 1.0 version !

Schroedinger is an implementation of the Dirac video codec
specification, written with speed, stability, and maintainability in
mind. Schroedinger provides a software library that implements both a
Dirac encoder and decoder. Also provided is a GStreamer plugin. No
end-user tools are included, since it is intended that users will use
existing tools written using a media framework such as GStreamer for
which a Schroedinger plugin is available.

The Dirac bitstream is now frozen, so video encoded today will be
decodable by future versions of Schroedinger and other Dirac-compliant
tools.


What's new?
-----------

This release is mainly intended for early adopters and integrators, in
order to work out many of the kinks that inevitably arise when a project
gains more wide usage.

Notable features:

- ABI and API stable
- Implements Dirac-1.0 and Dirac-2.1 bit streams
- Encoder is tested and tuned for SD and HD720
- Decodes HD720/25p in real-time on a Core Duo laptop


Where to get it
---------------

Schroedinger source code is available for download at:

http://diracvideo.schleef.org/download/schroedinger/

Information about Schroedinger and Dirac are scattered across several
web sites. We are working at consolidating this information into a
single web site, so changes may occur.

Project Web Site: http://schrodinger.sourceforge.net/
Bugzilla: http://bugzilla.schleef.org/
Git repository: git://diracvideo.schleef.org/git/schroedinger/


What is Dirac?
--------------

Dirac is a video codec specification created by the BBC R&D division
that provides state-of-the-art compression performance for a wide range
of video sizes and bitrates, encompassing low bit rate web video,
broadcast SD and HD television, nearly-lossless intra coding for studio
editing, and digital cinema. Dirac was created from the ground up to
be free from any patent claims. Dirac is also the name of the original
software implementation of the Dirac specification.

Last edited by Guest; 24th February 2008 at 20:34. Reason: corrected URL to project web site
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Old 24th February 2008, 20:37   #2  |  Link
Guest
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Is this a Linux only thing?

Any binaries available?
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Old 27th February 2008, 19:28   #3  |  Link
Caroliano
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By the way, Dirac 0.9.1 was released a while ago. MediaCoder only has the 0.9.0 release, and seems that no-one informed them about this bug-fix release. Someone registered there can ask for the update? Then I can test in windows, because the other ways I know are too dificult for me.



And "encoded today will be decodable by future versions of Schroedinger and other Dirac-compliant tools", except in case of bugs... which is likely I think....
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Old 28th February 2008, 01:53   #4  |  Link
Sharktooth
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"bugs" in the bitstream specs?
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Old 28th February 2008, 03:43   #5  |  Link
Caroliano
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No, in the implementations, I think.

Quote:
Originally Posted by timborer
encoders and decoders are (more or less) cross compatible. We have successfully coded material with one and played back on the other. Over the coming weeks we will continue to work to rigorously ensure that both implementations conform to the spec.
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Old 28th February 2008, 22:19   #6  |  Link
bratao
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BTW, you guys already noticed that in the Dirac blog says that Dirac will be the new VC-2 standart ?
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Old 29th February 2008, 17:46   #7  |  Link
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That's DiracPro, not Dirac. DiracPro was meant for professional (low compression, high bitrate) work.

http://www.bbc.co.uk/rd/projects/dirac/diracpro.shtml
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Old 29th February 2008, 18:07   #8  |  Link
dimzon
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Can anybody compile if for win32 with avisynth input support?
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Old 29th February 2008, 18:12   #9  |  Link
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Nice. So WMV9 is VC-1, DiracPro is VC-2, and DNxHD is VC-3! I'm taking bets as to what'll be VC-4!
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Old 29th February 2008, 20:38   #10  |  Link
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Quote:
Can anybody compile if for win32 with avisynth input support?
That can be interesting.

Quote:
what'll be VC-4!
Super "I.S"
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Old 1st March 2008, 10:06   #11  |  Link
guada2
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@dimzon

I i remenber, Kurtnoise with Damrod had developed a version under WIN32.
One could ask them (nicely) to revise this version.... alas is not succeeded yet.
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Old 1st March 2008, 10:10   #12  |  Link
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Just a question.
Somebody can it tell me the difference between Rududu and Dirac?

Thanks
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Old 1st March 2008, 10:44   #13  |  Link
Sharktooth
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rududu "info": http://forum.doom9.org/showthread.ph...958#post305958
diracpro specs: http://dirac.sourceforge.net/DiracSp...0-DiracPro.pdf
dirac specs: http://dirac.sourceforge.net/DiracSpec2.1.0.pdf

Last edited by Sharktooth; 1st March 2008 at 10:48.
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Old 2nd March 2008, 04:22   #14  |  Link
Caroliano
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Quote:
Just a question.
Somebody can it tell me the difference between Rududu and Dirac?
Your question is like asking the diference between Xvid and Theora or x264 or Mpeg1. They are very diferent codecs, although both are based in wavelets, as the Xvid and cia. are based in DCT.
Quote:
That's DiracPro, not Dirac. DiracPro was meant for professional (low compression, high bitrate) work.
Yeah, that is right, but "If VC-2 is well-received we'll propose an extension so that it covers the whole of Dirac."
http://sonofid.blogspot.com/2008/01/...d-at-last.html
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Old 7th March 2008, 23:46   #15  |  Link
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Looks interesting!
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Old 8th March 2008, 18:49   #16  |  Link
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Quote:
Originally Posted by Caroliano View Post
Yeah, that is right, but "If VC-2 is well-received we'll propose an extension so that it covers the whole of Dirac."
http://sonofid.blogspot.com/2008/01/...d-at-last.html
ugh, who needs intra coding only
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Old 9th March 2008, 01:01   #17  |  Link
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Dirac. Schrodinger. Such names of scientists.
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Old 10th March 2008, 02:17   #18  |  Link
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Quote:
Originally Posted by bond View Post
ugh, who needs intra coding only
Ehh me me especialy for intermediate Editing im really looking forward to Dirac as DxnHD (VC-3) seems weak
Dirac and AVC Intra seem to be the nicest options for the moment vs alot of non Standard stuff like Canapus HQ or Cineform (upto 120 mbit)
And Dirac even seems to get a self developed CUDA Decoder/Encoder implementation so it will be most likely even without big GFX support fast like H.264 (ah and ofcourse it's State of the Art Technology and most likely Patent Free so it would be a perfect replacement for Theora and yes even H.264) . And there will be no barrier for Accelleration under LINUX like there is with H.264 and VC-1 currently (no Decoder core revealing by ATI nor Nvidia) .
If you know the History of Wavelet codecs then you know that visually there are superior, they look HVS wise more right then Block based approaches Rududu really showed that nicely and even one of the i would say Main Researcher on H.264 in one of his papers admits that Wavelets could have been a better approach especialy for Grain/Noise Dr.Marpe (Cabac Patent Owner)

Hey Rududu is OS now too totaly missed that http://rududu.berlios.de/
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Old 10th March 2008, 09:26   #19  |  Link
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i-frame only = good for editing

the idea behind DNxHD, ProRes and the like is you have a high-bitrate, online quality ("online" being in the editing sense - broadcast quality and greater) codec that is reasonably lightweight. editing anything that has delta frames is a stupid idea if hard disk space is so fast and cheap. these codecs are like a bridge between uncompressed and offline codecs (DV, mjpg, etc).

this may seem unnecessary if computers are able to edit HD in uncompressed without too much fuss (just a couple of terabytes of very fast RAID via fibre channel), but considering the next generation of cameras are shooting up to 4k (!!!), a high quality compressed, and FAST codec is very appealing. check out redcode for a good example, if not a bleeding-edge one that's not fully proven yet (i'll be finding out next week how well it really works )

i'd love to see a patent free codec in an opensource editing program... say cinelerra on a linux box with native diracpro support. you could cut in whatever you want and conform in HD on a linux box , or go tapeless like what the BBC do with Ingex.
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Old 11th March 2008, 12:51   #20  |  Link
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Quote:
Originally Posted by Mug Funky View Post
just a couple of terabytes of very fast RAID via fibre channel
In the case of 4K a couple of hundred of TB via 10 Gb/s fibre channel or ethernet (even that leaves you with rather small margins, probably need dual channel to be save) pushing nearly 2 GB/s of throughput with realtime editing ... that is getting pretty fussy even by professional standards

PS. wavelets aren't really ideal for near lossless coding either, no way to guarantee error bounds.

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