I need to find an SD card that can actually write 25MB per second across the card. I don’t think any of the current Class 10 cards will, maybe one of the UHS-1 cards, but I’ve read conflicting reports in any case. Why do I need to write at this speed? Well I’ve seen bursts over 180mb per second. The reason I’m using GOP 3 is because it actually saves the file when the camera crashes. With GOP 6 and GOP 12, I have to eject the battery and restart the camera. In any case, I’ll post a couple of PNG stills below from the peaked 186mb bitrate footage.
Again, this high of bitrate may never be stable on the GH2. It may not even be necessary for 4:2:0 1080p footage. Below are 3 PNG images taken directly from footage at 88mb, 132mb and 176mb. The 176mb footage is one stop brighter due to bumping the lens while flashing the camera. Everything else is the same.