Comments on: Dirac on the way to become VC-2 http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/ Just another GNOME Blogs weblog Fri, 04 Jul 2008 22:52:43 +0000 http://wordpress.org/?v=2.3.3 By: James Henstridge http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/#comment-1416 James Henstridge Thu, 31 Jan 2008 20:11:40 +0000 http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/#comment-1416 There was a talk about this at LCA. Saying that Dirac will become VC-2 is not quite accurate: "DiracPro" is being standardised as VC-2. http://www.bbc.co.uk/rd/projects/dirac/diracpro.shtml DiracPro basically simplifies the codec further (so it can run with low latency/on simple hardware) and makes a few decisions that move it more towards being almost lossless. This is targeted mainly at HD video production/archiving rather than web video, and significantly reduces the compression (to somewhere between 1:2 and 1:8, which is fine for editing and archiving). It is expected that the video would often be paired with uncompressed PCM audio rather than something like Vorbis. So you probably don't want to use DiracPro/VC-2 for streaming video off your website. It is better to think of VC-2 as adding a new field where the codec can be used. There was a talk about this at LCA. Saying that Dirac will become VC-2 is not quite accurate: “DiracPro” is being standardised as VC-2.

http://www.bbc.co.uk/rd/projects/dirac/diracpro.shtml

DiracPro basically simplifies the codec further (so it can run with low latency/on simple hardware) and makes a few decisions that move it more towards being almost lossless.

This is targeted mainly at HD video production/archiving rather than web video, and significantly reduces the compression (to somewhere between 1:2 and 1:8, which is fine for editing and archiving). It is expected that the video would often be paired with uncompressed PCM audio rather than something like Vorbis.

So you probably don’t want to use DiracPro/VC-2 for streaming video off your website. It is better to think of VC-2 as adding a new field where the codec can be used.

]]> By: uraeus http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/#comment-1415 uraeus Thu, 31 Jan 2008 14:25:30 +0000 http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/#comment-1415 Well it might mean that Dirac replaces Theora as the open source codec of choice in the medium to long term at least in some use cases. For Vorbis and Ogg this will probably just be a good thing (as it creates more cases where people want a free audio codec) Well it might mean that Dirac replaces Theora as the open source codec of choice in the medium to long term at least in some use cases. For Vorbis and Ogg this will probably just be a good thing (as it creates more cases where people want a free audio codec)

]]> By: DoomHammer http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/#comment-1414 DoomHammer Thu, 31 Jan 2008 14:03:27 +0000 http://blogs.gnome.org/uraeus/2008/01/31/dirac-on-the-way-to-become-vc-2/#comment-1414 And what does that mean to Theora and Vorbis? And what does that mean to Theora and Vorbis?

]]>