similar to: packet rearranging questions

This is a heads up to let you know of my plans to work on a senior thesis project dealing with editing Vorbis losslessly in Audacity. You can find more information about my plans and what I'm up to here: http://www.reverberate.org/computers/thesis/ "vcut" from vorbis-tools will be an excellent starting point for me. I notice that it's marked "experimental"; why is

I've made a lot of progress on my lossless Vorbis editing project. I have a few more questions about granulepos issues I don't quite understand. granulepos is a property of Ogg pages, yet it is a field in the ogg_packet struct. When reading packets from an Ogg stream, the granulepos is set to -1 for all packets except the last packet in a page. From this I infer that - for encoding,

Hello I have experienced some problems with vcut (media-sound/vorbis-tools-1.0-r1 package from Gentoo/Linux). I have a long live record I have encoded in OGG (maybe it would have been easier to cut the WAV file and encode the parts, but still). The file was encoded with oggenc from the same package as vcut. I have therefore tried to use vcut to split the long OGG file in several smaller files.

While testing the new vcut, some of the early results had badly framed headers. I actually didn't notice it at first, because I was testing with oggz-validate, but ogginfo does identify the problem: "WARNING: Vorbis stream X does not have headers correctly framed. Terminal header page contains additional packets or has non-zero granulepos" Conrad (or someone else) may want to

Hi, I have a question regarding vcut. In the man page, it says: DESCRIPTION vcut reads an Ogg Vorbis audio file and splits it at the given cutpoint, which is a sample number. <p>What I want to do, is to cut an Ogg Vorbis file at a given time. Say, I have an Ogg Vorbis file, which is 1 hour long, and I want to cut it into two half hour parts. With a fixed bitrate

On 6/18/09, Conrad Parker <conrad at metadecks.org> wrote: > This sounds like it needs a new tool specifically for fixing broken > Ogg files. I see two solutions: 1) the new vcut which I reckon will fix the problem since it has to split and rebuild the audio in a new Ogg 2) an Hex editor, even if just to check what's wrong in the metadata section -Ivo

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Hi While implementing OSS Ogg/Vorbis encoding and streaming using RTP/RTCP for both unicast and multicast, I have come across a few issues I need to clear out regarding the numbering of ogg_packets and their granulepos value. Below are the result for two different scenarios. <p>In the first scenario, ogg_packets are generated using a) vorbis_analysis_headerout() b) while

Hi there, in fact, my purpose is to write tool which will allow one to split ogg file with vorbis audio *and* theora video codecs, but at first I'd like to understand how the splitting of Ogg Vorbis stream works. So I looked at existing tools that split Ogg Vorbis audio files, i.e. `vcut' utility in vorbis-tools package, and Ogg plugin from `libmp3splt', but I found that engine code

Hi there, First of all, sorry for my English I'm not a native english speaker. I need to develop and application witch does 3 tasks with oggs files : 1/ chain 2 ogg files 2/ extract a part from an ogg file 3/ add silence between two chained oggs files. Basically, - For the 1st task, I think that the best way to chain ogg files is to use the "cat" (on linux) or "copy

> There are a usually lot more data packets than header packets, so > having an internal length there hurts your bitrate a lot more. Of > course, it may not be significant for an uncompressed text codec. If muxed with a video, it's insignificant (well, for my test cases). > With codecs using the 'count of decodable samples' rule to calculate > their granulepos, the

I'm working with a streaming Ogg Vorbis system where I'm taking the stream output (from a darkice server) and saving it to hour-long files, then reassembling excerpts from these files (sometimes spanning two or three) into a single file for playback. I've got two problems (well, related to this, but anyway). 1) The "chunk" files I'm saving into have mangled headers. 2)

Hi, I've got alot of long 1-2hr files which I'd like to split up into 5-10 minute chunks. ?I think this should be possible using a small shell script and vcut, but my scripting abilities are lacking. ?Does anyone know of the existence of a script which would do this, or know how I'd go about making one? So say I had a 60 min file (60mins.ogg) I'd like to issue a command

This time in vcut: vorbis-tools/vcut/vcut.h:23 and 24. No, I'm not spending quality time with grep; I'm trying to compile vorbis with the native Sun Forte compilers. Much badness, of which these // issues are only part. :-( More details to follow... Patch/inc/lazy. {+} Jeff Squyres {+} squyres@cse.nd.edu {+} Perpetual Obsessive Notre Dame Student Craving Utter Madness {+} "I

2008/10/29 Romain Beauxis <toots at rastageeks.org>: > > I am currently implementing theora for our application. > In our model for generating ogg streams, we may want to stop > a stream while not providing a new YUV data buffer for encoding. > > Current API doesn't allow such thing, since the eos flag is set by the > packetout function only when the last_p parameter

Hello Fellow-Vorbisites, I've written a multi-track encoding/decoding library based upon fishsound. Utilized Visual Studio 2010 to build 32-bit DLL's (Debug mode - no optimization) of all the following: libogg 1.3.1 libvorbis 1.3.3 libspeex 1.2rc1 libflac 1.2.1 liboggz 1.1.1 libfishsound 1.0.0 Currently testing under Windows 7 (64-bit). Test Scenario: ========== Recording from two

Here's a coffee break for all you coders out there. I use to run a BBS system back before the web and this was sent to all on my BBS system by Tim Saari. Don't know if he wrote it or not though... :) (Sung to the tune of "Let it be") When I find my code in tones of trouble, Friends and colleges come to me, Speaking words of wisdom: "Write in C". As the deadline fast

Here's a coffee break for all you coders out there. I use to run a BBS system back before the web and this was sent to all on my BBS system by Tim Saari. Don't know if he wrote it or not though... :) (Sung to the tune of "Let it be") When I find my code in tones of trouble, Friends and colleges come to me, Speaking words of wisdom: "Write in C". As the deadline fast

I've got a question about the granulepos in speex packets. >From the speex manual (http://www.speex.org/manual2/node7.html#SECTION00073000000000000000): >The third and subsequent packets each contain one or more (number found in header) Speex frames. These are identified with packetno starting from 2 and the granulepos is the number of the last sample encoded in that packet. In

Ups! Maybe it's time somebody corrected that statement then - the wiki seems the right place to put the correct algorithm, IMHO. Cheers, Silvia. On Feb 13, 2008 10:06 AM, Ralph Giles <ralph.giles@artifex.com> wrote: > > On 12-Feb-08, at 2:57 PM, Ralph Giles wrote: > > > http://wiki.xiph.org/index.php/GranulePosAndSeeking > > I'm not sure it's helpful to