similar to: Ogg bitstream spec question

Hi, I am considering implementing the Ogg bitstream spec. Having read the spec, I am left with just one matter requiring clarification (making it a pretty well written spec, in my book): Can a packet begin on the same page as the previous packet ends on? The spec does not appear to be explicit about this. It would seem that I could indicate that there were (e.g.) 3 segments in my page,

as per yesterday's discussion at #theora -- It has been suggested that we devise a method such that we will be able to add certain features to the bitstream (interlace, exotic color subsampling, clip length flag for download, etc), in such a way as to not obsolete streams encoded previously. Rillian's suggestion, which is pretty much standard practice, is to add a bitstream revision

Dear members, since two weeks I am stuck, trying to demux a physical ogg stream (theora and vorbis) and play the audio part using vorbisfile. I hope that one of you can give me a hint or point me to additional documentation. I used ogg.h and vorbisfile.h. The way so far: - initializing an ogg_sync_state - inserting data to sync_state using ogg_sync_buffer - when whole page found

Hello all, I've been working a little inside the Theora decoder when I found that it seems that many videos had the very same huffman tables encoded into their bitstreams (at least the ones that I could take my time to dissecate). I found that the tables are listed as TH_VP31_HUFF_CODES in the file huffenc.c. I tried to investigate a little bit more to see who was setting the bitstream

Hello, I´m just curious: How far is Theora from a bitstream freeze? From TheoraTodo: "Derf has come up with a number of suggestions for improving the flexibility of the bitstream based on his experimental encoder work. These will be implemented, if not entirely supported by the reference decoder, before alpha 3 is released." Are those changes supposed to be the last adjustments?

Hello, Could you kindly point me to some instruction, how to encode demuxed files (.m2v and .mp2) to .ogg (Theora + Vorbis)? I was trying to use ffmpeg2theora, but I don't know, how to put two files to ffmpeg2theora (one audio an one video) and did not found, how to mux them into one file? Exist a way, how to do two pass encoding? I'm using Ubuntu Fiesty Linux. Thank you, Jiri Navratil

Hi, I've seen several implementations of Ogg demuxing that use a zero granulepos to detect headers. However, I do not recall seeing this in the Ogg docs - is this an abuse that happens to work because Vorbis is timed by end granule, or is it a proper way to check ? Thanks

Hi, I'm looking for more documentation on the Vorbis bitstream format. The goal for me is to write an optimized decoder using only integer or fixed point math for use on the Phatnoise Car Audio System (see http://www.phatnoise.com). I've already found the info on the Ogg framing system and I've already written my own thing for parsing through Ogg frames (easy). Also, is RTP

Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) compression in the same bitstream What is the meaning of this? can i find more information about this somewhere? And what is packel loss concealment, an you enable this somewhere? thanks! -------------- next part -------------- An HTML attachment was scrubbed... URL:

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

Hi, would you be interested in a patch to support kate bitstreams ? Kate is a bitstream format for text data that can be muxed in ogg, here presumably alongside a Theora video. It can be used to carry subtitles, and several separate streams can be muxed concurrently (eg, for subtitles in several languages). More info about Kate can be found there: http://wiki.xiph.org/index.php/OggKate Note

I am putting together an ogg mux/demux application which uses two logical streams. One is a vorbis stream, the other is some application specific data. This came together really quickly, following the ogg/vorbis documentation it took only a few hours to get it up and running. Just a small question... My application stream is currently running as a continuous stream but really I want it to be

Hi, I have a question about the format of Theora bitstream header. It seems to me that there are differences between the specification[1] (version 2004 Oct 1) and its reference implementation in libtheora 1.0alpha3 released at 2004 Jun 1. I mean that... please refer to Section 6.2 'Identification Header Decode' in that specification[1] and the function

ok now I see why we need another packet in the header. The first one is basically for ID purposes (theora_decode_header()). I've jammed my huffman trees in there but it sucks because I need them later on when I actually build the huffman tree structs (theora_decode_init, calls InitHuffmanSet()). At that point the original header packet is gone so I've been keeping it around in a buffer.

On 11/09/2007, Ian Malone <ibmalone@gmail.com> wrote: > > Embedding in Ogg is the simple bit; the only point of contention > being whether you use a magic number to label it as metadata or > just package XML and let the parser sort it out. (With a bit > more experience under my belt I'm persuaded a magic number might > be worthwhile, otherwise there'll be someone

Hi! OGG specification said that: - It is possible for a stream to consist of a single page. - Page can consist of multiple packets. Could anyone tell me: - Will logical bitstream of _one page_ (b-o-s and e-o-s at the same time) with a _few packets_ be correct according to the ogg spec? - And, if such logical (multipacket singlepaged) bitstream is correct, how can I generate it by using

Dear experts, I am trying to understand the structure of the Speex .spx file, so I can packetize each frame in one packet for example, and in the receiving end, I can decode a file that has all the received frames (some of them may lost). I tried to figure out what is the delimiter used to separate the frames but I could not so far. I also tried to deleted some data from the .spx file or change

Hello, could somenone please describe me the vorbis specific physical bitstream structure, as I haven't found any documentation about it. Thank you ******************* Pierre-Henri Quelen phq@laposte.net "Accédez au courrier électronique de La Poste : www.laposte.net ; 3615 LAPOSTENET (0,13 €/mn) ; tél : 08 92 68 13 50 (0,34€/mn)" --- >8 ---- List archives:

HOgg 0.4.1 Released ------------------- The HOgg package provides a commandline tool for manipulating Ogg files, and a corresponding Haskell library. HOgg is in hackage, or on the web at: http://www.kfish.org/~conrad/software/hogg/ This is the fourth public release. The focus is on correctness of Ogg parsing, production and editing. The capabilities of the hogg commandline tool are roughly on

Hi everybody! I encountered a strange problem with ices-2.0.0. I use a icecast2/ices2 combo ti stream live audio and I use ices to record my stream. This worked well until last week. Since then the recording function produces somehow corrupt ogg-files. I cannot decode them to wav with oggdec, the program tells me "Only one logical bitstream currently supported". ogginfo prints out