On Sun, 19 Apr 2009, David Morse wrote: > The original video from the camera, that you can download at > http://www.speakeasy.net/~morse/fan.avi , is pretty high density - > only 500k, and gzip can only squeeze a further 2% out of it. It plays > in all the movie players you care to name.
That file is MJPEG compressed. (Checked by playing it with mplayer.) > Once cinelerra loads it and rerenders it, that's when it becomes huge > and low-content-density. Its 50x larger than the original: 10,000k, > and bzip2 can compress it by a factor of 3, that tells me its not very > random, and thus not well-compressed. It looks like 27 frames at 512x384 pixels. At 24 bits per pixel that'd be a little under 16 megabytes. Some minimal compression (run-length encoding for instance) might drop it down to about 10 megabytes. So your AVI file is compressed, as AVI files almost always are, and your Quicktime file is uncompressed or minimally compressed, as Cinelerra-generated Quicktime files often are. So far I'm not hearing anything surprising. If you were really getting a 10-gigabyte file that would be surprising, but I think it's more plausible that you're confused about what a gigabyte is than that you're actually getting that - since you also said "20 times larger!!" and that'd only be 10 megabytes, which is reasonable. A gigabyte is a thousand (or 1024, depending...) megabytes. The colour thing is obviously a problem, but that sounds to me like a completely separate issue; I don't think there's anything wrong with the file size. -- Matthew Skala [email protected] Embrace and defend. http://ansuz.sooke.bc.ca/ _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
