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One issue with AVCHD is that (like HDV) it’s based on a codec that is not really built for editing in the way that DV is. DV is an intraframe codec, which means that each frame of video is compressed using redundancies within the frame itself, and thus can be reconstructed and interpreted by your computer’s processor without having to refer to other frames in the video stream to gather the necessary image information. HDV, being MPEG-2-based, and AVCHD, being H.264-based, use both intraframe and interframe compression, which means most of the frames in your video stream need to be referred to other frames to gather all the image information that constitutes the frame. Because all this cross-referencing is so processor- and memory-intensive, it can really slow down your editing.
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Cut Lines: Using the AVCHD Format in Final Cut Pro
http://www.eventdv.net/Articles/News/Feature/Cut-Lines-Using-the-AVCHD-Format-in-Final-Cut-Pro-52450.htm
McManus, Joe
Event DV
2009
Abstract: One issue with AVCHD is that (like HDV) it’s based on a codec that is not really built for editing in the way that DV is. DV is an intraframe codec, which means that each frame of video is compressed using redundancies within the frame itself, and thus can be reconstructed and interpreted by your computer’s processor without having to refer to other frames in the video stream to gather the necessary image information. HDV, being MPEG-2-based, and AVCHD, being H.264-based, use both intraframe and interframe compression, which means most of the frames in your video stream need to be referred to other frames to gather all the image information that constitutes the frame. Because all this cross-referencing is so processor- and memory-intensive, it can really slow down your editing.
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