I'm working with AVCHD, 720 60p footage and am exporting with the "Match Sequence Settings" box checked. Can someone explain what the "MPEG Preview" format and "MPEG I-Frame" Codec are? These are the settings that pop up when the box is checked. The resulting file has a .mpeg extension, so it doesn't seem the sequence settings were matched exactly. But would this be a good file to edit later if need be?
A little about my workflow - I produce short news-style videos delivered primarily via the Web. I export an h264 Web version, but also want to export a file that I can archive and retrieve later, should I need to pull some portion of it for use in another story. I save my source footage for a while, but right now don't have the storage capacity or the desire to keep it around permanently. I tried exporting uncompressed AVI, but the file was much too large and I would eventually run into storage limitations with that as well. I had been using Final Cut Pro, and simply exporting a self contained QuickTime movie for this purpose, but I'm working almost exclusively on a Windows 7 PC with CS5 now.
Any help/advice would be much appreciated.
I'd recommend not using an export for other projects. Keep the originals. Hard drives are cheap these days. Get more if you need to.