5D MKII @ 1080p, What is the maximum total recording time of a single clip?

(I posted this on digital video section, but I will post here as well to get more feedback)

Title says it all.
5D MKII @ 1080p, What is the maximum total recording time of a single clip?

Also, I am experiencing a camera lock up problem with a 8GB Sandisk Ultra III CF card.
When I record a video @ 1080p, around 6 or 7mins into recording, it suddenly locks up to the point needing to remove the battery to reset the camera. And the video is lost.

Has anyone experienced such problem? If not, what is your CF card? If yes, have you resolved your issue? If so, what did you had to do?

max size 4Gb or 10-15 mins of video.

what is the speed on your CF card? If you are using 133x card? it can be the buffer get filled up and need time to write to card. this will stop the video.
On display screen is there a bar on left side when video stops? this bar shows the buffer fill. give it few mins and see if it unfreezes.
You need a 30mb or faster card. I used an old CF card to test before. video will stop in 3 sec because buffer is full. I am using 400x about 60mb/s write card. the buffer bar wont even show up if you have fast CF card.

I have not noticed the buffer bar, I will have to look for that.
Thanks!

As mentioned, the total file size for one clip is limited to 4GB due to the CF cards formatting is FAT32, and FAT 32 can not handle files larger than 4 GB.

This is the same for all video-recording models (T1i, T2i, 7D, 5D2, 1D4) because it's a limitation of using FAT32.

4Gb comes out to usually around 12min of video in 1080p/30 and 720p/60. You can get slightly more out of using 1080p/25 or 720p/50 but not very much. Works for me since youtube limits to 10min anyway unless you're a special account.

Czynot,

I did not see any bar on the left.
I assume that the bar shows up when buffer fills up without getting cleared fast enough?

what firmware are you running? try update the firmware. if problem still there? send in for service.

This happens to my Sandisk Ex III cards as well (I do see the buffer bar fill up before the freeze though). I think you can contact Sandisk and they will replace these cards, but I haven't tried contacting them myself.

I also use Lexar 300x cards, and have no problems with those.

12 minutes is max. I heard this was to stop people from producing films..well making it much harder I guess.