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Old 17th September 2008, 07:45   #1  |  Link
Kurtnoise
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Dirac 1.0.2 released

The release tar-ball can be downloaded from
http://diracvideo.org/download/dirac-research/
OR
http://sourceforge.net/projects/dirac/


Dirac Compression System
-------------------------

Dirac is a video compression system that provides general-purpose video compression and decompression tools comparable with state-of-the-art systems. Dirac is a format and compression technology, not a specific codec. The most important part of the Dirac project is the specification which can be found at http://diracvideo.org/specifications.


Dirac Project
-------------
The initial implementation of Dirac at resulted in a research implementation which is referred to as the Dirac codebase. It is now called dirac-research. It is a reference implementation and also a codebase for future algorithmic developments. Dirac 1.0.0 is the release of this codebase.

Dirac website
-------------
Information about Dirac and the associated projects can be found at http://diracvideo.org

What's new in this release
--------------------------
Several alpha and beta releases have preceded this release. The changes in 1.0.0 release are:

- Compliance with Dirac Bytestream specification 2.2.2
- Adaptive GOP structure
- Improved motion estimation.
- Improved pre-filtering.
- Major code refactor of encoder classes.
- Added conversion utility for horizontal 3/4 filtering.
- DirectShow Filter released to be able to play back Dirac v2.2.2 files raw bytestreams and Dirac wrapped in AVI in Windows Media Player.


Dirac content creation and playback
-----------------------------------
Information on the end-user applications that support Dirac can be found at
http://diracvideo.org/wiki/index.php...rt_Dirac_video

Last edited by Kurtnoise; 12th February 2009 at 08:50.
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Old 17th September 2008, 18:05   #2  |  Link
Anatasia
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so who gonna compile Direct Show filter for Schroedinger.http://www.diracvideo.org/git?p=dire....git;a=summary
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Old 17th September 2008, 19:48   #3  |  Link
bratao
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A long time that no one had made a Dirac vs Others comparations.
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Old 17th September 2008, 19:58   #4  |  Link
Leeloo Minaļ
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Is there any encoder tool for Dirac codec ?
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Old 18th September 2008, 07:18   #5  |  Link
Kurtnoise
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Quote:
Originally Posted by Anatasia View Post
so who gonna compile Direct Show filter for Schroedinger.http://www.diracvideo.org/git?p=dire....git;a=summary
DShow filters are already available on SF. Maybe you mean schroedinger and dirac libs ?

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Is there any encoder tool for Dirac codec ?
FFmpeg is quite good for this.



I'll try to upload something for you...
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Old 18th September 2008, 11:50   #6  |  Link
Anatasia
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Quote:
Originally Posted by Kurtnoise13 View Post
DShow filters are already available on SF. Maybe you mean schroedinger and dirac libs ?
No,I mean that directshow filter also include the encoder and decoder parts but only the source.But I don't know how to use MinGW to compile that on Win32.
I only use OggConvert to encode To dirac format in Linux
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Old 18th September 2008, 12:13   #7  |  Link
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There are two versions of the DirectShow filter. The regular Dirac one and a Schroedinger one. I assume that they are compatible with each other? Does anyone know which one of the two has the best performance?

Edit: Schrodinger seems to be the fast implementation

Last edited by clsid; 18th September 2008 at 12:16.
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Old 18th September 2008, 15:34   #8  |  Link
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I think the Schroedinger has CUDA support so it has advantage right now.
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Old 18th September 2008, 16:18   #9  |  Link
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Note 1: I'll post a FFmpeg build later.
Note 2: read the install file.
Note 3: no CUDA support in my build.

Last edited by Kurtnoise; 20th September 2008 at 15:27.
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Old 19th September 2008, 00:34   #10  |  Link
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time to integrate dirac in megui?
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Old 19th September 2008, 04:54   #11  |  Link
Delerue
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Weird. New VLC build doesn't play as promised. Dirac Dshow Filter register, but MPC can't play it (tried with 2 videos from Dirac SourceForge). LibSchroedinger Dshow Filter can't even register. So, in other words, for me Dirac doesn't work at all.
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Old 19th September 2008, 07:56   #12  |  Link
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any hints what settings (ignoring speed and lossless) would potentially give the best quality for a specific datarate?
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Old 19th September 2008, 08:58   #13  |  Link
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Quote:
Originally Posted by Sharktooth View Post
time to integrate dirac in megui?
it's too early imo...

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Originally Posted by Delerue View Post
Weird. New VLC build doesn't play as promised. Dirac Dshow Filter register, but MPC can't play it (tried with 2 videos from Dirac SourceForge). LibSchroedinger Dshow Filter can't even register. So, in other words, for me Dirac doesn't work at all.
SF provides only raw files (RGB). You need to transcode them. btw, I updated my libschroedinger package...liboil library was missing. So, registration should be ok now. Playback is fine for me in MPC_HC except that I cannot seek through the file.

I also uploaded a FFmpeg build to play with it and to have avisynth support for inputs. Default settings are not bad I'd say but it's slow (6 fps on my Q9450) with a simple Crop & Resize...


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Originally Posted by Selur View Post
any hints what settings (ignoring speed and lossless) would potentially give the best quality for a specific datarate?
According to the doc, the best user cases are presets defined in the cli...

Last edited by Kurtnoise; 19th September 2008 at 09:00.
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Old 19th September 2008, 09:07   #14  |  Link
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Quote:
it's too early imo...
totally agree,...

Quote:
According to the doc, the best user cases are presets defined in the cli...
thanks for the info

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Old 19th September 2008, 10:45   #15  |  Link
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what kind of input can be used for the encoder?
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Old 19th September 2008, 12:14   #16  |  Link
Kurtnoise
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yuv or anything that's supported by FFmpeg if you use my build (even avs scripts) instead of the cli...
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Old 19th September 2008, 15:12   #17  |  Link
Anatasia
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Quote:
Originally Posted by Kurtnoise13 View Post

Note 1: I'll post a FFmpeg build later.
Note 2: read the install file.
Note 3: no CUDA support in my build.
Can you aslo compile Direct Show filter for Schroedinger I think it includes both the encoder and decoder.Though I think it need to update the liboil and the schrodinger library cause it used the old version of win32-devel file.

Also there's a plugin for Quicktime QuickTime plugin based on Schroedinger

Last edited by Anatasia; 19th September 2008 at 15:28.
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Old 19th September 2008, 15:55   #18  |  Link
Kurtnoise
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Quote:
Originally Posted by Anatasia View Post
Can you aslo compile Direct Show filter for Schroedinger I think it includes both the encoder and decoder.Though I think it need to update the liboil and the schrodinger library cause it used the old version of win32-devel file.
Quote:
Dirac and Schroedinger libraries produce compatible bitstreams. However the compression performance of the Schroedinger library is not on par with the Dirac library as yet.
http://diracvideo.org/wiki/index.php...rac_bitstreams

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Originally Posted by Anatasia View Post
Also there's a plugin for Quicktime QuickTime plugin based on Schroedinger
no, thank you...
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Old 19th September 2008, 16:16   #19  |  Link
bratao
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Kurtnoise13,
You said that ou have encoded a video.
Please post some screenshots of video to us. And the Bitrate used.

Thanks
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Old 19th September 2008, 16:22   #20  |  Link
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ooh, new codec
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