On 8/12/06, Ian Clarke <ian at revver.com> wrote: [snip] >> Most AVIs can be compressed by a further 1%. > I doubt it, except perhaps for small AVIs, and I certainly doubt that this is > true of most > compressed video formats. Generally speaking information theory tells us that > compressing data that has already been compressed is rarely effective.
All seekable media format impose at a minimum a constant (as a function of time) header overhead for seeking and syncronization. Some formats are better than others. AVI isn't especially great. 1% for normal web bitrate video of any length wouldn't be shocking to me. As far as compression goes for big media files... let the application do it.. or better, tell people to use more efficent formats.
