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02-08-2011, 02:58 PM   #1
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Limited video recording with K5

Hi everyone

I just got my K5.
I tried to do some movie using 16 GB SDHC memory card.
On lcd it shows me 34 minutes recording. When is recording it shows
8 minutes .....some seconds.After then i have to press the shutter release button again .
Why i can not record continuously?
Any sugestions.
Thanks. Kende

02-08-2011, 03:02 PM   #2
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What class is your SDHC card? You need a minimum class 6 for video but best is class 10 . I have a Transcend class 10 and work fine
02-08-2011, 03:12 PM   #3
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I have a Kingstone Class 10 card
02-08-2011, 03:17 PM   #4
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The card is formated FAT32 so it has a 4GB file size limit.

02-08-2011, 03:40 PM   #5
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It's not the card problem, the shown time is time before K5 sensor overheats and battery dies.
02-08-2011, 04:14 PM   #6
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QuoteOriginally posted by i83N Quote
It's not the card problem, the shown time is time before K5 sensor overheats and battery dies.
No, it's the 4GB file limit. 8 minutes of Full HD video in MotionJPEG is approximately 4 GB. Four 8 minute + some seconds videos would be 34 minutes and 16 GB.

QuoteQuote:
K-5 Manual Page 176

You can record movies continuously up to 4 GB or 25 minutes. When the SD Memory Card is full, recording stops and the movie is saved.

Last edited by boriscleto; 02-08-2011 at 04:23 PM.
02-08-2011, 04:25 PM   #7
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Read the question! He asks why when he shooting time is 5-8 minutes no less the 4gb file is 25 minutes.
02-08-2011, 04:34 PM   #8
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QuoteOriginally posted by Kende Quote
Hi everyone

I just got my K5.
I tried to do some movie using 16 GB SDHC memory card.
On lcd it shows me 34 minutes recording. When is recording it shows
8 minutes .....some seconds.After then i have to press the shutter release button again .
Why i can not record continuously?
Any sugestions.
Thanks. Kende
QuoteOriginally posted by i83N Quote
Read the question! He asks why when he shooting time is 5-8 minutes no less the 4gb file is 25 minutes.
Where does he say anything about 5 minutes? He says when he sets it to Movie it shows 34 minutes. When he presses the shutter release it shows 8 minutes and some seconds. After 8 minutes he has to press the shutter again. 8 minutes and some seconds of 1024p MJPEG is 4GB. The card has a file size limit of 4 GB. 4 8 minutes and some second clips would be 34 minutes and 16 GB. To shoot for 25 minutes you would have to reduce the settings to SD video.

02-08-2011, 09:07 PM   #9
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Boriscelto is right, and i83n is wrong. Unless you are shooting with an SDXC card which uses the exFAT filesystem, your files will get no larger than the 4gb limit inherent to the FAT32 filesystem used on SDHC cards.

What this translates to at the highest setting (1080p, 3 stars) is a record time of a bit over 5 minutes. Lower quality video settings will give you a correspondingly longer record time, since they consume less space on the card on a per-second basis.

The 34 minute minute figure the original poster sees is a calculation based on the total space left on the card irrespective of the amount he can record per file. I.e. approximately 4 8 minute videos at his current quality settings.

I have successfully filled a 32gb SDHC card with successive 5 minute 1080p videos taken one immediately after the other and can assure you that sensor overheating is not the source of the time limitations in the files, nor is the battery dying.
02-08-2011, 11:21 PM   #10
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But I have SDHC and stil getting 5-8minutes(depends on outside temperature)
02-08-2011, 11:39 PM - 1 Like   #11
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QuoteOriginally posted by i83N Quote
But I have SDHC and stil getting 5-8minutes(depends on outside temperature)
It doesn't matter if you have SD or SDHC. They both use FAT32 (or even FAT16), which is a 32-bit file system, and thus cannot use memory addresses of more than 32 bits (4GB). Only SDXC uses 64-bit exFAT to allow larger memory addresses.

The sensor or battery cannot possibly accurately estimate the time to overheat/battery failure. They are not that precise, nor designed to detect highly variable ambient conditions, nor can they predict what you will be shooting (different scenes produce very different stresses on the sensor). If it shutdown to prevent overheating, it would either happen when it actually overheats (which is unpredictable), or be hard-coded to do so (like Sony and others do), in which case the time would be invariant.

Last edited by Cannikin; 02-09-2011 at 02:20 AM.
02-09-2011, 09:34 AM   #12
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QuoteOriginally posted by Cannikin Quote
It doesn't matter if you have SD or SDHC. They both use FAT32 (or even FAT16), which is a 32-bit file system, and thus cannot use memory addresses of more than 32 bits (4GB). Only SDXC uses 64-bit exFAT to allow larger memory addresses.

The sensor or battery cannot possibly accurately estimate the time to overheat/battery failure. They are not that precise, nor designed to detect highly variable ambient conditions, nor can they predict what you will be shooting (different scenes produce very different stresses on the sensor). If it shutdown to prevent overheating, it would either happen when it actually overheats (which is unpredictable), or be hard-coded to do so (like Sony and others do), in which case the time would be invariant.
Note that exFAT is optional, not required, for SDXC - Initial SDXC cards and devices will likely retain the file size limitations of FAT32.

It would kind of be nice if Pentax would "autosplit" files that reached the size limit, eliminating the recording time limit. (This is how DVDs work - they autosplit at 2GB and support seamless playback of split VOBs.)
02-19-2011, 11:38 AM   #13
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There are no inherent file system limitations to speak of regarding modern file systems and SD, SDHC, and SDXC cards.

ie: any SD card can be formatted to any of the various flavors of these file systems: FAT, NTFS, HFS, ext, XFS, ZFS. . . . . . . (Depending on your computer you may have more, less, or other formatting options)

The real limitation is the formats that the K-5 will recognize and format your card as. . . . . . . (currently only FAT32)

Last edited by RXrenesis8; 02-19-2011 at 01:23 PM.
02-19-2011, 12:42 PM   #14
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Btw. i can shot severel 5;32min Videos at 1080p@30fps in a row, so i dont think this is sensor overheating, i think its more because of an uncompressed Motion Jpeg Format reachesthe 4 GB mark.
02-20-2011, 01:12 PM - 1 Like   #15
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I think there is a limit for max movie size imposed by EU tax laws. So the cameras can be sold as photo and not filming equipment.
There is a saving the recorded file icon after the shoot, so it may be the limit of the buffer size in the camera.
Card types and size limits are listed in the manual I think.
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