Video Hack Question

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Video Hack Question

Postby Millenial88 » Sun May 17, 2015 9:15 pm

This is a definite noob question, but one that I'm very, VERY curious about

As of late, I'm using a D5100 with a 54mbps video hack along with a Lexar 128gb card. The allotted time I get for a single shoot is 10 straight minutes, which is perfectly reasonable. But as I'm done using up that time, the clock immediately shoots back up to 10 minutes and I get another crack. Compare this to the 64mbps hack which gives me 8 mins. and 46 sec. for one (and ONLY one) video shoot on the very same card and I think you'll all agree that this is a godsend for videographers. I've currently tested it to see how far it can go, leaving the camera on for three takes (roughly 30 minutes of footage) and I still get an additional 10.

However, I'm curious about the absolute maximum amount of time this hack can allow with my current card. I really don't want to find out the hard way when I'm in the middle of an on-the-fly shoot with only one 128gb card on me. Has anybody tested it out to the fullest extent and would like to share?
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Re: Video Hack Question

Postby Silverwolf » Mon May 18, 2015 8:09 am

Due to the file system the file will be capped off under the 4GB limit. So you can compare video lengths vs file sizes and draw a conclusion how many minutes you would be able to record before hitting the limit! Hope this helped!
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Re: Video Hack Question

Postby Millenial88 » Mon May 18, 2015 9:45 pm

I did it just now, twice.

For one 10-minute video, the maximum file size is 3.65GB. The two vids combined make up 7.31GB. Plus, I went the extra mile with my calculator and discovered that you can fit up to 35 full-length 54mbit videos on a single 128GB card!!!! (that's about 127.75GB with no photos) With an effective battery for the camera and a habit of shooting still photos of my subjects beforehand for exposure-sake (to replace the LCD), I'll/you'll/we'll be just fine.

Plus Lexar's 128GB cards are about $30-$40 cheaper than Sandisk's :)
Last edited by Millenial88 on Mon May 18, 2015 10:31 pm, edited 1 time in total.
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Re: Video Hack Question

Postby astronomer » Mon May 18, 2015 10:11 pm

Wow, is this an unexpected bug or what?

Simeon, come here and take a look.
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Re: Video Hack Question

Postby lain » Mon May 18, 2015 10:24 pm

Stupid question: is it maybe because the card is exFAT? Have we tested on exFAT before?
If my camera weren't in pieces in a box I'd check for myself...
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Re: Video Hack Question

Postby Millenial88 » Mon May 18, 2015 10:28 pm

lain wrote:Stupid question: is it maybe because the card is exFAT? Have we tested on exFAT before?
If my camera weren't in pieces in a box I'd check for myself...


Lexar's FAQs says that all the SDXC-type cards are exFAT. I checked and my card is indeed SDXC.
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Re: Video Hack Question

Postby Millenial88 » Mon May 18, 2015 10:34 pm

astronomer wrote:Wow, is this an unexpected bug or what?

Simeon, come here and take a look.


TBH, this might be something of a delightful surprise for videographers who want a little bit more quality out of their D5100 footage but often worry about card space.
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Re: Video Hack Question

Postby Simeon » Tue May 19, 2015 1:33 pm

it makes no sense. The code sets a time in seconds left based of 4gb/bps, and then when that runs out, it stops.

I'm beyond puzzled.
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Re: Video Hack Question

Postby Simeon » Tue May 19, 2015 1:38 pm

I wounder if there is a overflow, 128GB / 54mbps, that makes the code "misbehave"
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Re: Video Hack Question

Postby Silverwolf » Wed May 20, 2015 4:58 am

Oh my! So I might be mistaken with my advice and we might have a way in to produce more then 4GB of movie? Ff that is true then that must be one of the luckiest finds so far :D
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