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2430 Views 4 Replies Latest reply: May 7, 2010 4:41 PM by AppleMan1958
Currently Being ModeratedMay 6, 2010 10:20 PM (in response to A.Y.)Makes completely sense -- H.264 is a very highly compressed long GOP codec.
AIC is far more lightly compressed, I-frame (non-long GOP) codec.Cheers, author; The Ins and Outs of iMovie 09: Maximum Quality HD and DV
Currently Being ModeratedMay 7, 2010 9:02 AM (in response to A.Y.)As Steve noted, your results make sense - for your needs. H.264 is highly compressed and must be decompressed for viewing, so it takes time going in and back out. AIC is a much better way to share movie files, assuming you have disk space to spare, if there will be editing performed afterwards.
But H.264 is "far better" if the goal is to squeeze as much quality as possible into the smallest file possible, or lowest bandwidth or bitrate. That's why it's used (as AVC or MPREG-4) to put movies on disks.Dual G5 2GHz, Mac OS X (10.5.8)
Currently Being ModeratedMay 7, 2010 4:17 PM (in response to Wayne Henderson)Yes, Sony SR11 Full-HD AVCHD (H.264) format uses less than 1/5 the disk space 8GB/hr AVCHD vs. 45GB/hr AIC, and the video plays so smoothly and image quality so high when viewed with Sony Picture Motion Browser on my iMac under BootCamp XP.
Which is why I don't understand why all of QT H.264 videos exported by iMovie 09 play so choppily on the same iMac with footage imported from the same camcorder. Only QT AIC exported Full-HD videos deliver acceptable results so far.24" iMac (OS X Leopard/XP) and 20" Cinema Display, Since 84 Mac 128K and IBM PC
Currently Being ModeratedMay 7, 2010 4:41 PM (in response to A.Y.)You probably need to increase the bit rate.iMac 24 2.8Ghz, iPhone, TV, Mac OS X (10.6.3), Panasonic HDC-SD5 iMovie 8.0.6