Is there any way to get more than what seems to be 11 minutes of 1080p video out of my mk ii? I realize the mk iii has a 29 minutes limit as well. Is there any magic lantern hack or anything relatively magical that can extend the video recording time (I've read it's due to overheating?)?
Other than reducing the file resolution, the file size is limited to 4GB which is about 11 minutes at full resolution. The 5D MK III has a feature that creates a additional file once the 4GB file limit is reached, and does so until the 29 minute limit is reached.
The 4GB file limit is due to the Windows Fat 32 file size limitation and has nothing to do with overheating. The 29 minute limit has to do with European Taxes which kick in if a camera exceeds 29 minutes video recording capacity. File Size Limit For FAT32
Most computer users (which included me, until very recently) are usually not aware of the fact that there is a maximum file size memory limit on every formatted hard drive. This file system's maximum limiting size on stored files is set by its inherent design considerations. The FAT32 file size limit is only 4 GB minus 1 byte (232 - 1 bytes)
. That means, any kind of file cannot attain a maximum size of 4GB. Therefore, FAT32 is unsuitable as a file system for large databases and video applications.
Many people that use video converter software, find that creating video files greater than 4 GB is just not possible on a hard drive formatted using FAT32 format. Though initially, one may think that it is due to some flaw in the video converter software, the problem lies in the limitation of FAT32 file size limit itself. So, there is no option but to resort to an NTFS format for hard drive formatting when you have large sized files, greater than 4GB. The actual maximum volume size allowed under a FAT32 format is 2 terabytes. The maximum number of files that one can store under FAT32 is 268435437.