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San Disk never worked for me, I once shoot a whole day and had some excellent footage on the card and next thing i know, its gone....The card had worked in the past too. Once you go Pro Master you never go back (Other then the tacky name)
but is that really worth it? when youre working with an h264 for avchd codec, whats the point of a higher bit rate? without the right codec, all youre doing is adding information to the picture that you dont need?