CompuServe Messages

#AVI Codecs testing

    06-Oct-95 16:24:24
Fm: ROGER BEHYMER 73417,2024
To: dave aguilar 76260,453
>>wow! nice bit of lab work here, Behymer! Thanks. I'd like to say "it was nothing" but it was a lot of time spent. At least I'm finally using Animator! <grin> <<there are a few things we can draw from this, Behymer. first of all, AVI becomes a meaningless term. <ggg> the codecs seem consistent by manufacturer; Cinepak at 1.2, MS Video 1 at 1.2, Intel Raw 25.9, Intel Indeo R3.2 at 1.2, ATI RLE at 20.2, Autodesk 24 lossless at 69.1, and Autodesk FLC at 19.7. definitely what i would expect as rations go.>> But what I want to be able to do is produce AVI files that can be distributed to others. I'd like to keep them in the <10MB range without sacraficing too much in quality. I just don't understand why Renderize is so effecient. (Sorry to keep going back to that. It's my only frame of reference.) <<and as applies here at out office too, the Cinepak and Intel Indeo modes seem to be the best compromise on size/image. a few sidenotes also. the 24-bit lossless compression schemes from Autodesk were not intended for playback, but for maintaining the integrity of the data for future editing sessions. it has been highly recommended that folks save two versions of any animation… a lossy and a lossless… one for playback and one for editing.>> Hmmm… The Intel codecs didn't work so well for me. One was too large (26 MB) and the motion was jerky. The other was bad visually. As far as working with lossy and lossles versions: I understand this and will work this way whenever possible. <<also, curious… did you try playback using a RAMdisk? this improves playback dramatically. other aspects of system which can affect playback: defragmentation of hard disk, disk caching, FLC preloaded in scriptor (if 8-bit images are allowed), and faster hard drive access times.>> Thanks for the tips. Someday I hope to have a PAR and be able to dump to tape for the final product but for now I have to settle w/ AVI.