H264 is an interframe codec, which means if you want to read one frame, you usually need to read some of the frames before and/or after as well. This means that there is a lot more computer work going on (1) transferring data (multiple images) off the hard drive and (2) performing the extra decoding necessary for interframe video.
You might have a fast processor but a slower hard drive (USB, e.g.), or a lightning fast hard drive but you’re rendering in AE, playing iTunes, and running a web browser with 15 creative cow tabs open, which means you’re running 50 or so flash animations as well….
Or you might be running multiple clips at the same time, which ups the transfer and processing time immensely.
However you measure it, H264 requires more computer resources to run than an intraframe codec of comparable filesize. Kudos to Adobe for developing a playback engine that can handle it in real-time, but that doesn’t mean it can do it as effeciently than with an intraframe codec, like ProRes or DNxHD.
Ben Unguren
Motion Graphics & Editing
http://www.mostlydocumentary.com
Some contents or functionalities here are not available due to your cookie preferences!
This happens because the functionality/content marked as “Vimeo framework” uses cookies that you choosed to keep disabled. In order to view this content or use this functionality, please enable cookies: click here to open your cookie preferences.