So i shot some footage of my brother playing tennis using 60i on my HF10. After editing i exported the video using quicktime conversion, and i checked the box under settings to "deinterlace source video". Now what exactly happens when i check this box? does it just convert my video to 30p? if so am i just wasting time by shooting in 60i then de-interlacing, when i could just shoot in 30p from the camcorder?