Record Time for video

D

DVX100Shooter

Veteran
I am being told it doesn't matter how big of a SD card you put in the camera, you can only shoot 5 minutes of video in 720p mode. I know someone who shot a music video with his D90 and I could have sworn that he told me the opposite that he used a bigger card and was able to shoot more than 5 minutes of video at a clip.
 
no, it does that too but it's another counter that shows up and the time depends on how hot the camera is. since it doesn't prevent you from staying in live view, which is what causes the heating up whether you're recording or not, it's not likely to be the reason. search this board for more info, it's been discussed around two hundred times already.
 
The well-established fact is that the D90 automatically stops recording after exactly five minutes.

"could've sworn" = likely false memory
 
it could also be a perfectly fine memory and his friend was just making things up, which spending some time on this board should convince anyone that a lot of people do all the time for some reason.
 
a bigger card? how big is it? I use a 16GB CF card on my D3s and it shoot video for only 5 mins. No, it isn't heat on D3s.
 
You can only shoot for 5 minutes at a time because the camera likes to pretend it has a 35mm 400ft magazine inside.
 
nah, while the camera does have a s35 sized sensor i think it's trying more to be an old camera that doesn't do 3-perf, so if that's the reason it would only shoot 4 minutes.
 
It does make one wonder what the engineers's mindsets were thinking for figures like 5 mins for 720p, and 12 mins for VGA. But, we will never know why!!
 
i really think it has to do with file sizes, although since the limit on the card is 2gb it must be an artifact from before they decided that 50mbit was too much and went with 15 instead. :-)
 
So let me dare ask this next question. If I only get 5 minutes per recording clip, by estimate, how many 5 minute clips can I put on say a 8gb or higher card? Someone mentioned that Live view adds to the camera heating up. So is there a way to turn it off and say use an external monitor that can be attached to the camera?

I really haven't explored shooting video with my D90 yet so thats why I am asking all these questions! LOL!
 
DVX100Shooter said:
Someone mentioned that Live view adds to the camera heating up. So is there a way to turn it off and say use an external monitor that can be attached to the camera?
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so where would the image on the monitor come from if you don't have liveview? ;-) the liveview doesn't "add" to the camera heating up, it's the sole reason. i guess you mean the lcd, but that doesn't make the camera overheat afaik.
 
mattsand said:
i really think it has to do with file sizes, although since the limit on the card is 2gb it must be an artifact from before they decided that 50mbit was too much and went with 15 instead. :-)
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I've recorded 5 minutes clip and it is only approximately 800MB. So I don't think it's file size limitation. FYI I use the SanDisk 16GB so disk size isn't the issue here too.

For those who mentioned about heating. I discovered that if you zoom in the liveview or show the histogram, these will heat the body faster. I've tried this on my D3s.
 
xha8 said:
I've recorded 5 minutes clip and it is only approximately 800MB. So I don't think it's file size limitation
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they needed the files to never be 2gb guaranteed, and either they thought this was needed to be sure, or they had originally planned for a higher bitrate. i'm guessing of course, but both scenarios sound much more likely than a restriction in the sony license, or an overheating issue since it doesn't really help and they already have another limit function for that, plus they have longer times at lower res, which overheats the camera as much afaik.

For those who mentioned about heating. I discovered that if you zoom in the liveview or show the histogram, these will heat the body faster. I've tried this on my D3s.
Click to expand...
very unlikely. i'm not disputing that you've indeed seen this but it could just as well be coincidence and frankly i don't see a reason how that could possibly be. it's the sensor that heats up, and the sensor doesn't care what the camera happens to do with the image. unless the d3s does something clever when zooming, does it or is it just the standard digital zoom of the previous model?
 
DVX100Shooter said:
Someone mentioned that Live view adds to the camera heating up.
Click to expand...
You are definitely confused. The video that the camera records actually comes from the live view stream. Kill live view and you also kill video recording. What you probably heard or read is that the LCD might make the camera overheat faster, which is a reasonable speculation. But I can't imagine it making that much of a difference.
 
mattsand said:
very unlikely. i'm not disputing that you've indeed seen this but it could just as well be coincidence and frankly i don't see a reason how that could possibly be. it's the sensor that heats up, and the sensor doesn't care what the camera happens to do with the image. unless the d3s does something clever when zooming, does it or is it just the standard digital zoom of the previous model?
Click to expand...

I think that it's possible. Anything that causes the chips inside the camera to work harder could increase the internal heat. So communicating with and powering the lens could do this, as well as adding a dynamic graphic overlay.
 
you're right in theory and i'm not going to dismiss it because i haven't used the camera, but i can't imagine processor use makes much of a difference in heat, it's the sensor itself that gets hot. it's like trying to make a boiling pot even hotter by rubbing it. :-)
 
Fat 32 format makes the size of the file is the limiting factor. The scene itself plays a role, if it has less detail to record it could theoretically record longer. I think the cameras all use the fat 32 system.

"FAT32
In order to overcome size limit of FAT16, while at the same time allowing DOS real mode code to handle the format, and without reducing available conventional memory unnecessarily, Microsoft implemented a next generation, known as FAT32. Cluster values are represented by 32-bit numbers, of which 28 bits are used to hold the cluster number, for a maximum of approximately 268 million (228) clusters. This allows for drive sizes of up to 8 TiB with 32 KiB clusters, but the boot sector uses a 32-bit field for the sector count, limiting volume size to 2 TiB on a hard disk with 512 byte sectors.
On Windows 95/98, due to the version of Microsoft's SCANDISK utility included with these operating systems being a 16-bit application, the FAT structure is not allowed to grow beyond 4,177,920 (< 222) clusters, placing the volume limit at 127.5 GiB (≈137 GB).[14][15] A limitation in original versions of Windows 98/98SE's Fdisk utility causes it to incorrectly report disk sizes over 64 GiB.[16] A corrected version is available from Microsoft, but it cannot partition drives larger than 512 GiB (≈550 GB)[17]. The Windows 2000/XP installation program and filesystem creation tool imposes a limitation of 32 GiB [18]. However, both systems can read and write to FAT32 file systems of any size. This limitation is by design and according to Microsoft was imposed because many tasks on a very large FAT32 file system become slow and inefficient.[14][19] This limitation can be bypassed by using third-party formatting utilities.[20] Windows Me supports the FAT32 file system without any limits.[21] However, similarly to Windows 95/98/98SE there is no native support for 48-bit LBA in Windows ME, meaning that the maximum disk size for ATA disks is 128 GiB (≈137 GB),[22] the maximum size of an ATA disk using the previous long-standard 28-bit LBA.
FAT32 was introduced with Windows 95 OSR2, although reformatting was needed to use it, and DriveSpace 3 (the version that came with Windows 95 OSR2 and Windows 98) never supported it. Windows 98 introduced a utility to convert existing hard disks from FAT16 to FAT32 without loss of data. In the NT line, native support for FAT32 arrived in Windows 2000. A free FAT32 driver for Windows NT 4.0 was available from Winternals, a company later acquired by Microsoft. Since the acquisition the driver is no longer officially available.
The maximum possible size for a file on a FAT32 volume is 4 GiB minus 1 byte (232−1 bytes). Video applications, large databases, and some other software easily exceed this limit. Larger files require another formatting type such as NTFS."

Ross
 
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