oggz-sort man page
oggz-sort — Sort the pages of an Ogg file in order of presentation time.
oggz-sort [-o filename | --output filename ] filename
oggz-sort [-h | --help ] [-v | --version ]
oggz-sort sorts an Ogg file, 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.
Some encoders produce files with incorrect page ordering; for example, some audio and video pages may occur out of order. Although these files are usually playable, it can be difficult to accurately seek or scrub on them, increasing the likelihood of glitches during playback. Players may also need to use more memory in order to buffer the audio and video data for synchronized playback, which can be a problem when the files are viewed on low-memory devices.
Some older Ogg encoders also produce pages which incorrectly have granulepos timestamps recorded that shouldn't be: pages which have no completed packets must have a granulepos of -1. oggz-sort will correct such granulepos during the process of sorting.
The tool oggz-validate can be used to check the relative ordering of packets in a file, and also to detect incorrect granulepos on pages with no completed packets. If either of these errors are reported, or use oggz-sort to fix the problem.
oggz-sort accepts the following 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.
Correct the page ordering in broken.ogv:
oggz sort -o fixed.ogv broken.ogv
Conrad Parker January 25, 2008;
Copyright © 2008 Annodex Association
oggz-validate(1), oggz-merge(1), oggz-dump(1), oggz-diff(1), hogg(1)