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24th February 2008, 18:17 | #1 | Link |
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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 |
27th February 2008, 19:28 | #3 | Link |
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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.... |
28th February 2008, 01:53 | #4 | Link |
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"bugs" in the bitstream specs?
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28th February 2008, 03:43 | #5 | Link | |
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No, in the implementations, I think.
Quote:
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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 |
29th February 2008, 18:07 | #8 | Link |
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Can anybody compile if for win32 with avisynth input support?
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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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1st March 2008, 10:44 | #13 | Link |
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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
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2nd March 2008, 04:22 | #14 | Link | ||
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Quote:
Quote:
http://sonofid.blogspot.com/2008/01/...d-at-last.html |
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8th March 2008, 18:49 | #16 | Link | |
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Quote:
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10th March 2008, 02:17 | #18 | Link |
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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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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 Last edited by CruNcher; 10th March 2008 at 03:01. |
10th March 2008, 09:26 | #19 | Link |
interlace this!
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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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11th March 2008, 12:51 | #20 | Link | |
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PS. wavelets aren't really ideal for near lossless coding either, no way to guarantee error bounds. Last edited by MfA; 11th March 2008 at 13:13. |
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