Hi, I'm currently working on a project to create some order in the video codec chaos and for the completeness of the information I've got a couple of questions about the Theora codec. I realize I'm a bit early to add the Theora information while it's still in Alpha stage but I figured the base won't be changing anymore (atleast not a lot anyway). - What FourCC code(s) is (are) being used for Theora movies? - Can you give a a "general" description? (MPEG-1, MPEG-2 or MPEG-4 based? Compressor, Decompressor? Etc.) - Is there already a fixed URI for a direct link to the codec info/download page? Thanks in advance, Age Bosma --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'theora-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
On Thu, Sep 25, 2003 at 01:32:52PM +0200, Prodoc wrote:> I'm currently working on a project to create some order in the video > codec chaos and for the completeness of the information I've got a > couple of questions about the Theora codec. I realize I'm a bit early to > add the Theora information while it's still in Alpha stage but I figured > the base won't be changing anymore (atleast not a lot anyway).Sounds like a useful resource. What's the URL?> - What FourCC code(s) is (are) being used for Theora movies?None at the moment. We don't recommend avi as a container format, and (as far as I know) no one has implemented such a thing.> - Can you give a a "general" description? (MPEG-1, MPEG-2 or MPEG-4 > based? Compressor, Decompressor? Etc.)It's not based on any of the MPEG standards. The motivation for theora, as with all the xiph.org codecs, is to produce a multimedia format that can be used in perpetuity without royalty or licence fees on the technology. Theora is based on On2's VP3 format. The reference implementation includes both an encoder and decoder.> - Is there already a fixed URI for a direct link to the codec > info/download page?Not specifically, but http://theora.org/ should work for the medium term. Hope that helps, -r --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'theora-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
VP3 is not based on any MPEG standard. -----Original Message----- From: Prodoc [mailto:agebosma@home.nl] Sent: Thursday, September 25, 2003 10:35 AM To: theora@xiph.org Subject: Re: [theora] Codec Information <p>Ralph Giles wrote: <p>>>>I'm currently working on a project to create some order in the video >>codec chaos and for the completeness of the information I've got a >>couple of questions about the Theora codec. I realize I'm a bit early to >>add the Theora information while it's still in Alpha stage but I figured >>the base won't be changing anymore (atleast not a lot anyway). > > > Sounds like a useful resource. What's the URL? >No URI available at this stage, I fist want to get the whole thing finished before starting to think about that. What I can tell you is that it will be part of a site with loads of other resource projects I've been doing and a couple of friend have done (QuickTime, XML, etc.). I'll let you know when it's done.> > None at the moment. We don't recommend avi as a container format, and > (as far as I know) no one has implemented such a thing. >So Theora will be a container by itself as well? Or is something else going to be used? Not just the avi containers use the FourCC standard, won't you couse much more confusion by creating a codec which can't be identified by the "standard" method? Players need to be able to identify a movie to know which codec to use to play the file.> > It's not based on any of the MPEG standards. The motivation for theora, > as with all the xiph.org codecs, is to produce a multimedia format that > can be used in perpetuity without royalty or licence fees on the > technology. Theora is based on On2's VP3 format. >But isn't the VP3 format based on an MPEG standard? If you claim VP3 files will be confertable to Theora without any quality loss (mentioned on the Theora site) shouldn't it be based on the same thing? I hope you can enlighten me a bit more :-) Age Bosma --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'theora-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'theora-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Hi, Can you tell me if OGM is the official name of the container used for e.g. video? If yes, where do the characters OGM stand for? Or is just OGG the name of the container? Age Bosma <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'theora-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.