I shoot in Sony HDR XR 150E Camcorder in 1920 X 1080. But I wan't to edit my project in 720p. The raw files are in ".mts" format. How do I achieve this?
The usual suggestion is to edit in a sequence that matches your Source footage ( native) and then export to what ever you want eg a 720p codecXXXXX.
However...you can Create a 720p sequence and edit your footage with in that. There is an option you can set : 'Scale to Frame size'.
I recommend the first method... but you may have your own reasons for doing otherwise.
Actually my present Hardware is not so powerful to do a Full HD Edit though I'm looking forward to upgrade my system soon. Actually there are many small clips in my project so do i need to check the option "Scale to Frame size" for each one of it?
Can I just convert all the clips into 720p and then import them in premiere (720p sequence) for edit?
Hardware is not so powerful to do a Full HD Edit
The resolution of the file will have little or no impact on the computer's ability to play the clips. That's more a factor of the codec used and the specific parameters of that codec. Meaning if you convert to 720 using the same codec, it'll be just as difficult to play back.