similar to: How Ogg mappings translate into the codecs parameter in Ogg media types

2008/5/29 Ralph Giles <giles at xiph.org>: > On 28-May-08, at 6:20 PM, Conrad Parker wrote: > >> /* TODO: this should check against 42 for the relevant version numbers */ >> if (op->bytes < 41) return 0; > > I gather this means the USE_THEORA_PRE_ALPHA_3_FORMAT #if should instead be > based on the length of the header packet. I'm not sure why you're

Hi all, I am trying to set up the codecs table in the wiki and we have played a bit with Dirac to find out what existing tools write into the header. The Schroedinger implementation by Fluendo uses (or used to use) "KW-DIRAC" as the identifier in the Ogg header. "BBCD" is the identifier of each of the Dirac data packages. More recently, I read that the Dirac Sequence header

2008/5/24 Ivo Emanuel Gon?alves <justivo at gmail.com>: > > I received a comment from the IESG that we should have some sort of > list to describe how Ogg mapping strings translate to codec parameter > strings, so I went ahead and compiled a table with all known Ogg > codecs, and I would like feedback in case I inserted an error > somewhere. > > The draft is located

I agree - we should use only hex or octal, but not mixed. Cheers, Silvia. On Sat, May 31, 2008 at 2:20 AM, Ivo Emanuel Gon?alves <justivo at gmail.com> wrote: > I received the following comment regarding the table: > >> The table contains a mix of octal and hexadecimal 'escape sequences' >> for non-printable / non-ASCII octets. >> I strongly suggest to only

On 5/24/08, Conrad Parker <conrad at metadecks.org> wrote: > The magic is not always char[8] -- it's an arbitrary number of > characters, and as far as I know there is no official limit. I was under the impression that 8 was the limit. Thus the extra white space JM adds on Speex and CELT magics. I may be wrong, though. > So it's 7 for Vorbis and Theora, 5 for FLAC So

"Silvia Pfeiffer" <silviapfeiffer1 at gmail.com> wrote: ... > Also, it would be good if we can keep > our magic numbers to the first 8 bytes. So Kate and Yuv4mpeg both need to be trimmed. ... >>> char[9]: '\x80kate\0\0\0\0' | kate >>> char[9]: 'YUV4MPEG2' | yuv4mpeg Regards, Martin -- Martin J Leese E-mail: martin.leese

On 5/26/08, ogg.k.ogg.k at googlemail.com <ogg.k.ogg.k at googlemail.com> wrote: >> char[8]: 'kate\0\0\0\0' | kate > > This is incorrect, should be: > > char[9]: '\x80kate\0\0\0\0' | kate The last one is how it's listed on ogginfo code, but the first one (char[8]) is how it's described in the wiki page. I thought the

On 5/28/08, Silvia Pfeiffer <silviapfeiffer1 at gmail.com> wrote: > Hope this clarifies what I am suggesting. It did. Thank you. > FLAC and CMML for example have version fields. How many other "in-house" codecs have one? This may be worth knowing. -Ivo

David Flynn has proposed a new Ogg Dirac mapping. The draft is here: http://davidf.woaf.net/dirac-mapping-ogg.pdf This is a much bigger break from other codecs than my draft (at http://wiki.xiph.org/index.php/OggDirac). We talked a bit about it on IRC today. Below is my summary; hopefully David can correct anything I got wrong or misleading. Comments? There are two main differences

On Thu, 25 Aug 2011 20:01:11 +1000 Silvia Pfeiffer <silvia at silvia-pfeiffer.de> wrote: > Hi BCXA, > > CMML is deprecated. You should use KATE instead. > > Cheers, > Silvia. ok i admit this statement came as a surprise for me. cmml is about metadate/annotations, how can it be replaced by KATE ( which is mainly about subtitles as far as i can see? startx

I think it would be helpful. Being able to say that the magic resides in the first 8 bytes for all our codecs is a plus when it comes to parsing and consistency. We could go for 9 instead, but that's somewhat of an odd number... I don't think the \x80 is too much of an issue, but I don't know what that packet type field is really used for. Cheers, Silvia. On Fri, Jun 13, 2008 at

I'm trying to create files that contain a video stream, one or more audio streams, subtitles, and DVD-like chapter information. ATM, I use ogm containers that can handle all this. But although ogm is supported e.g. by xine (including chapters), it seems to be an unofficial hack. Is that correct? I'd like to move to ogg containers, since ogm doesn't support theora videos. My final

Hi, I recognize the main name behind CMML here :) Does the redesigning of CMML allow overlapping clips ? This is the main reason of my current ramblings about seeking. While karaoke was one of the initial goals behind kate, it is just a way the format can be used with (in fact, the format itself does not refer to karaoke at all, but styles and motions). At the moment, it is a fairly versatile

> > I did see references to Skeleton, I'll have a look at it. I didn't > > realize it was used widely > > It's not widely used currently. The idea is to make that happen. Oh, I get you now. > CMML does of course other things besides subtitles. Subtitle support > was pretty much just added recently. Kate however does not seem to > offer more than CMML in

Thanks for the feedback, > I have looked into the patch. It doesn't take into consideration > neither Skeleton, which is used now in pretty much everything encoded > in Ogg (except for single stream Vorbis and Speex files), nor the file > extension for Theora, which is now .ogv. To be honest, I just added Theora because I needed a simple way to multiplex streams. Also, it'd

> I'm testing this. Meanwhile, a brief question, do you really want > Kate's media type to be "application" as opposed to "text"? Thanks. About the media type, my understanding was that text was for actual text, not binary that could be decoded into text. If you think another would be more appropriate, please tell which. If it would be text/x-kate, I'd see

Hi Developers, I am looking for one ogg file with cmml subtitle to test my subtitle code. But can not find in the web. Anyone can help me. best regards BCXA

Hi there, I'm not sure what the right place would be, please direct me to where is most appropriate if not this list. I am currently working on a codec designed for karaoke and text information, to be embedded in an Ogg container. It includes text, motion information, and style/placement. At the moment, the bitstream design is still in flux, but draws heavily from Vorbis and Theora, while

> Some of the things you talk about were not solved at the CMML level, but > rather through using different Ogg > logical bitstreams. While this is possible to do it this way (and probably a good idea for the examples like a clock in a corner), it implies that all the placements and logically different "items" are known at the start of the stream (since the Ogg spec says a

Hi, I've now uploaded the preliminary documentation on the xiph wiki: http://wiki.xiph.org/index.php/OggKate Attached is the current source tree for the libkate library. The tarball also contains the patch to oggmerge (which you will need to apply if you want to merge Kate streams with Vorbis or Theora streams) and the patch to MPlayer to use Kate streams as subtitles. An example is