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View Full Version : CamStudio/CamCodec - 4G limit?

FredThompson
7th November 2006, 11:19
Has anyone found a way around the 4G file limit when using CamStudio and the CamCodec for screen capture?

CamCodec set for LZ0 and level 5 compression (does that setting even affect LZ0? I have no idea) gives a compression ratio of 3.5:1 compared to HuffYUV which makes it nice for capturing screen output from file-intensive apps.
AlKwas
7th November 2006, 13:47
Has anyone found a way around the 4G file limit when using CamStudio and the CamCodec for screen capture?

4G file limit looks like a FAT32 limit.
FredThompson
8th November 2006, 03:27
I use only NTFS volumes. Do you have specific knowledge or was that a WAG?
jggimi
8th November 2006, 14:49
Of course that was a guess, Fred, since FAT32 has a limit of 4GB for an individual file.

These days, CamStudio is GPL SourceForge project. You might ask on their forum, or ask the developers directly. http://sourceforge.net/projects/camstudio/
FredThompson
9th November 2006, 07:05
Yes, I know it was a guess. The OP is very obviously seeking specific information and has nothing to indicate the drives in use are FAT32.

I've just found the destination drive didn't have enough available space. Going to retry. Maybe the limit is hardcoded into the portion which transfers from the temp directory to the destination. We'll see.

Love your avatar. Looks like Pooh.
FredThompson
14th November 2006, 15:56
Well, this 4G limit is definately something withint either/both CamStudio or CamCodec. CamStudio never reports an error but it won't create a file over 4G in length. I forgot to keep a window open to the directory with the temporary capture file so I don't know if that file was created properly. I'll do another capture then ask the folks who are watching the project to "fix" this. Thanks for the information.
FredThompson
15th November 2006, 07:48
Well, nuts! It looks like this just might be a hard-coded limit to the LZ0 format. CamStudio will chug along just fine, writing more than 4G but it does stop at the absolute limit of 4*1024*1024K. The resultant file won't play , it just yields a single frame quite a ways past the starting point.

Dunno if this is CamStudio or the codec. I've tried to capture to CamCodec format using ffdshow from CamStudio but it wouldn't work. At least, the things I tried didn't work. Time to report to the new "parents" of this baby...