similar to: new tarkin source

Hi Lourens, I fixed the YUV conversion and added a 'skip-empty-bitplanes' feature. The latter is still buggy, I have to check this again. But images look mach better now, even if you use higher compression ratios. (try ./main 1500 150 150 for a 352x288 image -- the output becomes blurred, but how does it looks when you compress it using jpeg down to about 2kB ...). Source is available

Hi everybody, I wrote last time some code to do video compression using a 3d integer wavelet transform. Since it uses a reversible lifting scheme and avoids a lot of floating point operations compared to Jacks initial Tarkin code, this should be somewhat faster and allow lossy+lossless compression. The current implementation is very experimental, but nevertheless I would be happy if some of you

Better late than never :) jack. --- Ogg Traffic for Tuesday, November 13, 2001 Jack Moffitt <[1]jack@xiph.org> _________________________________________________________________ Table of Contents 1. [2]Support The Ogg Project 2. [3]Status Updates 2.1. [4]Stan Seibert 2.2. [5]Chris Wolf 3. [6]New Developments 3.1. [7]Ogg On A Chip

Hello, I have in the past few days played a bit with libogg. My goal is to learn enough of it to try wrapping current tarkin codecs into an ogg file, with vorbis sound eventually. I did work on a small program which allows you to easyly (de)multiplex Ogg files in a way which seems to conform to the docs. You can do things like: oggmux in1.ogg in2.ogg in3.ogg - mux3.ogg oggmux mux3.ogg -

For all the curious: http://www.vorbis.com/~jack/tarkin-experimental.tar.gz ome instructions: tar xzvf tarkin-experimental.tar.gz cd tarkin make ./tarkin 95 ./tarkinplayer output.tark You'll need SDL and SDL-devel if you don't already have them. jack. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this

For all the curious: http://www.vorbis.com/~jack/tarkin-experimental.tar.gz ome instructions: tar xzvf tarkin-experimental.tar.gz cd tarkin make ./tarkin 95 ./tarkinplayer output.tark You'll need SDL and SDL-devel if you don't already have them. jack. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this

Suddenly, quite a few people have jumped in and started active experementation and discussion about Tarkin, as well as playing with the very rudimentary test-of-concept 3d wavelet coder jack, hatamoto and I hacked on last year. For your use, I've added a new mailing list, tarkin-dev@xiph.org, for discussion and hacking on Tarkin. The list is run, linked and archived at xiph.org like the

just for the record -- I think you mean video/theora when you mention vorbis+VP3. Vp3 is becoming Theora. Tarkin is another video codec project at Xiph. As for this whole MIME type issue, can someone enlighten me as to how this problem is addressed with Quicktime, Microsoft, and RealNetworks plug-ins today? Also, does an MPEG4 tag specify which audio codec is used? thanks - dan

Me again, this time not about patents but about wavelets. I've been doing some work on an image compression method which uses Haar wavelets plus VQ and entropy coding, and Segher Boessenkool told me in a private message that you are also doing a video codec. So I searched the archives and read a bunch of posts, but I never did find out any web address. And it's not on xiph.org either. So

Fredag, 3 januar 2003, skrev du: >Ogg has always appeared to me to correspond only to the _track media_ >and _sample_ layers of a QuickTime movie. So you still need to know >what all the CODECs are and how to use them individually to >manipulate what should be general data in the file. Please, somebody >correct me if I'm wrong. I have asked the same questions here on the

On Thu, 2 Jan 2003, David Wheeler wrote: > I think there should be a "generic" Ogg MIME type, e.g., application/ogg > or whatever. But nearly all Ogg files will only have a very small > subset of codecs, and it's _extremely_ helpful if the MIME type is > more specific. If you have read the I-D for audio/vorbis you can see that this is what it is actually for... It

> > 3. Would it be possible to work into the theora framework the > > possibility that a portion of a video file could be played from an > > external file? Example: I want my Star Trek TNG episodes from DVD to > > drive. The opening and titles are the same in each episode (almost) and > > therefore I want to save space by forking them in like I said. Is this >

On Thu, 2 Jan 2003, David Wheeler wrote: > I think there should be a "generic" Ogg MIME type, e.g., application/ogg > or whatever. But nearly all Ogg files will only have a very small > subset of codecs, and it's _extremely_ helpful if the MIME type is > more specific. If you have read the I-D for audio/vorbis you can see that this is what it is actually for... It

Kenneth Arnold (ken@arnoldnet.net) wrote : > On Mon, Oct 09, 2000 at 02:46:57PM -0700, Ralph Giles wrote: > > Re minimal facilities, all the compressed stream can really do is provide > > timestamps (or ranges). It's easy enough to keep track of exactly where > > you are in the decoder (libvorbis provides sample-accurate seeking, for > > example). What about

>>> Ideally? You seem to be stuck in a world of operating systems that need >>> a specific filename extension to identify a file type. >> >> Sounds like you're a Mac user. > > <snip> > > ...determining a file type is not a task for the OS... For the past few years, users of the QuickTime container have faced a similar dilemma to what we have

> From: David Wheeler [mailto:dwheeler@ida.org] ... > > The #1 use of a MIME type is to launch an application to process > the data. If the MIME type doesn't include information on the > container format, then the application won't know what to do with > the result. You might as well ask, how does an application know what to do when it's launched from your

Thanks, Dan, for understanding what I meant with that sentence and clarifying it. I was indeed thinking of "video/theora" as MIME type to signify a theora & vorbis a/v-stream. If "Theora" is not the right name for this integrated stream, please come up with another one that is readable - I strongly dislike "oggvth". Silvia. -----Original Message----- From: Dan

On Thu, 2003-01-02 at 10:48, David Wheeler wrote: > > > Unfortunately, an Ogg file can (and will) contain different codecs in > > the same file. Imagine a file that contains two chained groups of > > multiplexed bitstreams. The first group contains vorbis, vp3, speex, and > > subtitle streams. The second group contains FLAC, MNG, and MIDI streams. > > [The fact

On Thu, 2003-01-02 at 10:48, David Wheeler wrote: > > > Unfortunately, an Ogg file can (and will) contain different codecs in > > the same file. Imagine a file that contains two chained groups of > > multiplexed bitstreams. The first group contains vorbis, vp3, speex, and > > subtitle streams. The second group contains FLAC, MNG, and MIDI streams. > > [The fact

Dear David, I hope it's ok to forward your email to the developer lists. I have not seen a comprehensive scheme for MIME type naming and file extensions for ogg files yet - please anybody put me in the picture if there is. However, I have seen application/x-ogg used for ogg-vorbis files, which is according to MIME type registration rules an unregistered and experimental MIME type (see