CODEC's are the mathematical and data processing performed on a raw video file. Raw video files are large by nature and thus costly to manipulate or transmit, therefore CODEC's are used to compress them thus making transmission reasonable. The receiver of a video file therefore has to use the same "codec", only in reverse, that is, expand the file back into a playable video. The very term stands for compression/decompression. In some situations a codec is a no-brainer because the software can detect things automatically, such as with many playback situations. Other times the user has to be conscious of the codec, such as a video editor. You don't "do" anything with them other than to make sure you decompress (or expand) a video using the correct codec (the same one used to compress the video). Before you can "use" a codec it must be installed on your system. Some come with the OS, others are added by application installations, and still others are purchased and explicitly installed. Unfortunately there are hundreds of different codecs. Worse, many people confuse the file format with a codec. For instance, an avi is a file format, not a codec, and indeed a video compressed with any number of codecs can reside in an avi. Quick time is a file format, not a codec. Mpeg is both, that is, there is the mpg file format and there are various mpg codecs within them. Codecs are not only algorithms, but can also vary within themselves by applying various parameters, so you hear of terms such as bit rate, and your software has places to adjust all these parameters. Many camera manufacturers come up with their own proprietary codec (to avoid royalties) but what that means is that the software people such as Adobe have to include that manufacturers codec in their software if Adobe expects its users to be able to work with that camera. There are groups trying to standardize on codecs but all a camera manufacturer does is come up with a variation, possibly to avoid royalties (such as JVC with their TOD system, TOD merely being an mpg codec with 4-8 dummy bytes thrown in every GOP. Then once a video is made and put on a computer, one uses JVC-supplied software to convert those TOD's to mpg's (remove those dummy bytes) and viola, no royalty has to be paid!) From: [email protected] [mailto:[email protected]] On Behalf Of Steve Hacker Sent: Wednesday, September 22, 2010 4:42 AM To: [email protected] Subject: [AP] Re: Adobe Premiere Elements 7.0 - Audio Hiccups! - Can Anyone Help? B: Is this a compatibility issue with Premiere ELEMENTS, not just Premiere PRO? This is Greek to me. I don't even know what a CODEC is, or what to do with it...LOL :)
--- In [email protected] <mailto:Adobe-Premiere%40yahoogroups.com> , "Barry" <barrym...@...> wrote: > > Hi Steve, > > > > It seems the Flip uses the 3IVX codec and there is a compatibility issue > with Premiere: [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Adobe-Premiere/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Adobe-Premiere/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
