CELT (Code-Excited Lapped Transform) is anultra-low delay audio codecdesigned for realtime transmission of high qualityspeech and audio.This is meant to close the gap between traditionalspeech codecs (suchas Speex) and traditional audio codecs (such asVorbis).License: BSD License (revised)Changes:
This release should greatly improve the handlingof transients and reduce the amount of pre-echo,especially for larger frame sizes. There is nowsupport for frame sizes up to 512 samples forthose who don't have extreme delay requirements.The release also brings improved tuning for stereoand a variety of frame sizes and higher bit-rates.The API has been changed slightly to remove theoverlap parameter, which is now automaticallyselected based on the frame size.
oggz-merge(1) General Commands Manual oggz-merge(1)NAME
oggz-merge -- Merge Ogg files together, interleaving pages in order of presentation time.
SYNOPSIS
oggz-merge [-o filename | --output filename ] filename ...
oggz-merge [-h | --help ] [-v | --version ]
Description
oggz-merge merges Ogg files together, interleaving pages in order of presentation time. It correctly interprets the granulepos timestamps
of Ogg CELT, CMML, Dirac, FLAC, Kate, PCM, Speex, Theora and Vorbis bitstreams. Run oggz-known-codecs(1) for a full list of codecs known
by the installed version of oggz.
For example, if you have an Ogg Theora video file, and its soundtrack stored separately as an Ogg Speex audio file, and you can use oggz-
merge to create a single Ogg file containing the video and audio, interleaved together in parallel.
Similarly, using oggz-merge on a collection of Ogg Vorbis audio files will create a big Ogg file with all the songs in parallel, ie. inter-
leaved for simultaneous playback. Such a file is proper Ogg, but not "Ogg Vorbis I" -- the Ogg Vorbis I specification defines an Ogg Vorbis
file as an Ogg file containing only one Vorbis track at a time (ie. no parallel multiplexing). Many music players (which use libvorbisfile)
aren't designed to play multitrack Ogg files. In general however, video players, and anything built on a multimedia framework (like
GStreamer, DirectShow etc.) will probably be able to handle such files.
If you want to create a file containing some Ogg files sequenced one after another, then you should simply concatenate them together using
cat. In Ogg this is called "chaining". If you cat Ogg Vorbis I audio files together, then the result will also be a compliant Ogg Vorbis
file.
Options
oggz-merge accepts the following options:
Miscellaneous options
-o filename, --output filename
Write output to the specified filename instead of printing it to standard output.
-h, --help
Display usage information and exit.
-v, --version
Output version information and exit.
EXAMPLES
Merge pages of audio.oga and video.ogv:
oggz merge -o output.ogv audio.oga video.ogv
AUTHOR
Conrad Parker September 21, 2004;
COPYRIGHT
Copyright (C) 2004 CSIRO Australia
SEE ALSO cat(1), oggz-rip(1), oggz-dump(1), oggz-diff(1), hogg(1)oggz-merge(1)