60mbs bitrate with 15mb class 4 sandisk ultra? could somebody explain this?

S

samu810

Member
Hello, yesterday I was helping a friend shooting a weeding. I was using the Gh2 24L mode with the Driftwood Quantum X 'SpanMyBitchUp' v2b and a Sandisk Extreme pro 32gb 95mb/s. In the worst moment ( cake moment) my sd got full, so I tried to use a shitty sd , the sandisk ultra 15mb s class 4, and it worked so well!


I hadn´t any problems with writing speed, and i have bit rates of 60mbs, Could any explain what is happening?


This is a example video


http://www.mediafire.com/?xtbgg4rf79396z5
 
129 MByte Video Size / 58 Seconds Time = 2.224 MByte/s (17.792 MBit/s)
The card is able to do about 12 Mbyte/s (= 12000 Kbyte/s = 96000 Kbit/s = 96 Mbit/s)

Just my thoughts, i'm not a pro and don't know much about the hack.
 
Sometimes you get lucky with lower spec memory cards, where the manufacturer can't source the lower spec chips, so they end up using higher spec chips in cards that are supposed to be lower spec.

I noticed this 4 years ago with some batches of the lower spec Patriot "blue" SDHC cards that would benchmark way faster than they were supposed to. ( i.e. Class 6 cards that were writing at 20 MB/sec )
 
Thanks for replying, I don't understand so much about codecs world, but I used a sandisk extreme 45MB/s 16gb with my old GH1 and I remember I had problems with writting speed. And now with the 15MB ULTRA I don't have any problem..There are 8 Megabit to every Megabyte so 45*8=360?¿
 
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