Hey there,
I have had my 64gb Transcend 1000x cards for about a month now but hadn't had the opportunity to shoot anything RAW until last night. I kept running into problems with the recording stopping/skipping frames. My takes were each 2:30-3:00 minutes long.
When I got the cards I tested them and was able to get 8 minute long takes on all of them. However, those tests were shot in a decently lit room. Last night the video I was shooting was a huge black space with only the talent lit shot at iso 1250 1920x1080.
I know that shooting at high ISOs and dark scenes leads to higher data rates. Has anyone else had this problem? Should I try to return my CF cards and get different ones that are known for high write speeds?