This should help. It is the compression rates & times of previous model using the same codec:
The Samsung SC-HMX10 offers two choices for recording media, both solid-state. The primary media is a non-removable 8GB flash media. Using only this media, you’ll get approximately 88 minutes of video in the highest quality and 533 minutes in the lowest quality.
The second media option is a removable SDHC card. The SC-HMX10 is compatible is capacities up to 16 GB. SDHC cards range in price depending on capacity, and the prices are always falling. Though no card comes included with the camcorder, it’s certainly a good idea to pick one up. A 4GB card can hold around 44 minutes of video in highest quality and 267 minutes in the lowest quality.
The Samsung SC-HMX10 outputs video in the H.264/MPEG-4 format (the file extension is .MP4). This highly-compressed video codec should not be confused with the competing AVCHD format. AVCHD is a type of H.264/MPEG-4 codec, but the version Samsung employs is different, with both benefits and drawbacks.
More Here:
http://www.camcorderinfo.com/content/Samsung-SC-HMX10-Camcorder-Review-34476/Format.htm