Author Topic: How many minutes of RAW footage does a 32gb or 64gb hold?  (Read 10740 times)

idan_estee

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How many minutes of RAW footage does a 32gb or 64gb hold?
« on: April 28, 2014, 09:20:34 PM »
As per topic. Thx!

chmee

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Re: How many minutes of RAW footage does a 32gb or 64gb hold?
« Reply #1 on: April 28, 2014, 09:47:39 PM »
depending on your resolution and framerate. because the main reason for the filesize are the raw-frames, other block-types are negligible for a rough calculation.

xres * yres * 14bit * framerate = bitrate/second

example:
1920 * 1080 * 14bit * 24 frames/second = 696729600 bits/s -> ~70MB/second (add 10% for other data, reserve, overhead, whatever)

answering your question:

32GB -> 32.000 Mbyte card / 77 = ~415 seconds or ~ 6 minutes 55 seconds

regards chmee

aace

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Re: How many minutes of RAW footage does a 32gb or 64gb hold?
« Reply #2 on: April 29, 2014, 01:18:08 AM »
depending on your resolution and framerate. because the main reason for the filesize are the raw-frames, other blocks are neglibe for a rough calculation.

xres * yres * 14bit * framerate = bitrate/second

example: 1920 * 1080 * 14bit * 24 frames/second = 696729600 bits/s -> ~70MB/second (add 10% for other data, reserve, overhead, whatever)

answering your question:

32.000 Mbyte card / 77 = ~415 seconds or ~ 6 minutes 55 seconds

regards chmee

You're awesome chmee.

I have the Canon 7D and I get about 15 minutes of raw video for each of my 64GB cards shooting at 1728 x 972 (max continuous resolution at 23.976). Using Baldand's encoder, I can convert the raw to prores and I get about 1GB per minute of raw video after converting. MLRAWVIEWER: http://www.magiclantern.fm/forum/index.php?topic=9560.0

But chmee's answer is better.