On Aug 20, 2009, at 11:01 AM, Dana Collins wrote:
> > I have a QT movie (.mov format) showing a demonstration of realtime > audio pitch manipulation that I want to use for class lecture. The QT > original is at 27.8 MB - thought I'd port it to my iPod Touch for > convenience (I use an Apple A/V composite adapter for overhead screen > projection on downloaded movies), so, in QuickTime, I select "export" > then "movie to iPod", converting the format to .m4v - I noticed it > took an exorbitant amount of time (27 minutes, when the movie clip is > maybe 12 minutes) and then left me with an m4v file weighing in at a > whopping 80.5 MB! I was sure the file sizes would be exponentially the > reverse (isn't m4v a form of encoded "compression" as mp3 is to > audio?). > Does this sound right? Should I be using a different exporting > algorithm? It's entirely possible to do this, as QT might well be upscaling the video, because convert .mov to iPod gets you specifically formatted .m4v files. Without knowing what the original specs are, it's hard to tell, but if it was small (320 x 240 or something) it could well have been smaller in the original; .mov files can contain considerable compression as well. To shrink it down size-wise you'll have to use custom settings. -- Bruce Johnson University of Arizona College of Pharmacy Information Technology Group Institutions do not have opinions, merely customs --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed Low End Mac's G3-5 List, a group for those using G3, G4, and G5 desktop Macs - with a particular focus on Power Macs. The list FAQ is at http://lowendmac.com/lists/g-list.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/g3-5-list?hl=en Low End Mac RSS feed at feed://lowendmac.com/feed.xml -~----------~----~----~----~------~----~------~--~---
