New Blackmagic full resolution JPEG codec at DVinfo.net

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Old November 20th, 2006, 05:20 AM   #1
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New Blackmagic full resolution JPEG codec

Hi all,

I tried to search for more info about it, without success... is there anyone using it with their new Decklink updates ? I would like to know what's the required storage depending on the JPEG settings, compared to the space disk for uncompressed video. The only info I found :

The storage and data rates for uncompressed video are listed below.

525 NTSC uncompressed;
8 bit @ 720 x 486 @ 29.97fps = 20 MB per/sec, or 70 GB per/hr.
10 bit @ 720 x 486 @ 29.97fps = 27 MB per/sec, or 94 GB per/hr.

625 PAL uncompressed;
8 bit @ 720 x 576 @ 25fps = 20 MB per/sec, or 70 GB per/hr.
10 bit @ 720 x 576 @ 25fps = 26 MB per/sec, or 93 GB per/hr.

720p HDTV uncompressed;
8 bit @ 1280 x 720 @ 59.94field = 105 MB per/sec, or 370 GB per/hr.
10 bit @ 1280 x 720 @ 59.94field = 140 MB per/sec, or 494 GB per/hr.

1080i and 1080p HDTV uncompressed;
8 bit @ 1920 x 1080 @ 24fps = 95 MB per/sec, or 334 GB per/hr.
10 bit @ 1920 x 1080 @ 24fps = 127 MB per/sec, or 445 GB per/hr.

8 bit @ 1920 x 1080 @ 25fps = 99 MB per/sec, or 348 GB per/hr.
10 bit @ 1920 x 1080 @ 25fps = 132 MB per/sec, or 463 GB per/hr.

8 bit @ 1920 x 1080 @ 29.97fps = 119 MB per/sec, or 417 GB per/hr.
10 bit @ 1920 x 1080 @ 29.97fps = 158 MB per/sec, or 556 GB per/hr.

1080i and 1080p HDTV RGB (4:4:4) uncompressed;
10 bit @ 1280 x 720p @ 60fps = 211 per/sec, or 742 GB per/hr.
10 bit @ 1920 x 1080 @ 24PsF = 190 per/sec, or 667 GB per/hr.
10 bit @ 1920 x 1080 @ 50i = 198 per/sec, or 695 GB per/hr.
10 bit @ 1920 x 1080 @ 60i = 237 per/sec, or 834 GB per/hr.

Another thing : if someone is using it, would it be possible for him to post a few frame grabs with Online JPEG codec and 8bit uncompressed, to compare ?

Thanks !

Kristin
Kristin Stewart is offline   Reply With Quote
Old November 20th, 2006, 09:32 AM   #2
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I have used the codec and so far it looks great. It is hard to pin point the datrate of the codec because it is a variable rate codec. That means it will adjust the quality based on how complex each frame is. The datarate however is small enough to work very well on a single SATA hard drive which is much better then needing a huge raid-0. The files I have tested were around 12 MB/S and some people have tested as low as 8 MB/S.

If you will mainly be using the Decklink card for greenscreen shoots you can expect the file size to be kind of small since most of the screen will be a solid locked down color.

I do not have any smaples to share with you but you can download the codec for free and use it to render files to to check out the quality to see if it works for you. Just download the latest Decklink drivers and you will get the codec.
Thomas Smet is offline   Reply With Quote
Old November 21st, 2006, 02:56 AM   #3
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Thanks Thomas,

I tried the codec on some Red samples, but it seemed a little soft, probaly because it's not the full uncompressed source.

Cheers,

Kristin
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