Export for what purpose?
YouTube? Vimeo? DVD? Blu-Ray?
Archiving for future editing?
There are many ways to export. If you tell us the purpose of the export, we can do a netter job of advising you.
Also, many of the formats to which you might export won't play smootuly on a computer without dropping the frame size or resolution. So when you say it doesn't play smoothly, how are you playing it?
Youtube for starts. I think you are right about the computer playback. I first started editing the files on a MacPro Tower which only had a graphics card of 512MB. I then transfered the same file to my macbook pro laptop with a graphics card of over 1gb and it played nice and smooth. But for more info, the file is getting compressed from a raw 1.6gb to a 750mb file so I'm still confused on the playback since the 1.6 raw file plays just fine on the tower with no lag and lags like crazy with the compressed 750mb file.
Lastly shouldnt exporting with the "match sequence settings" keep the same resolution and raw atributes even though it may be cut up? Because when i do that I still recieve the "disk is full" error box.
I can't help with Mac settings, unless they match what I show here.
I suggest that you export to H.264 and use the YouTube preset. The actual size of the video on disk doesn't really matter if you are exporting to YouTube does it?
As for the oroginal post where you say the goal is to "keep the same smoothness and sharpness as the orignal file." ...
Well, that isn't really possible. But you should get a nice quality video out of the YouTube settings if you started with a nice quality video to begin with. Not 100%. But close enough to be happy with.
Start with these settings and if you really need to, you can mess around with some of them to attempt to get a better result. There is no point in exceeding the 8Mb/s that YouTube likes as far as I can tell. They will just reduce it when they post it for you.
the 1.6 raw file plays just fine on the tower with no lag and lags like crazy with the compressed 750mb file.
Generally speaking, larger files mean less compression and easier to play. Smaller files mean higher compression, requiring more horsepower to play.