Mark Curry
Forum Replies Created
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Hi David,
My thread states my purpose re: 4:4:4 SD – in short, this is a digital preservation job. There isn’t much point rendering a 4:2:2 capture to 4:4:4. The codec and drives aren’t the issue. The issue is finding a system/means (i.e. card) to capture 4:4:4 SD.
Mark
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Hi David,
This codec discussion is a side topic from my posted thread. I’ve worked with all the codecs you mention and in short we will be giving this careful consideration. Yes, QuickTime includes all old codecs for future legacy purposes, but they do become obsolete as workflows/systems move away from some codecs (Video codec anyone?). BitHJazz is a very impressive codec yes (as described here https://codecs.onerivermedia.com/).
My main concern presently is working how to capture 4:4:4 SD.
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Yes that is right – dual link though is the only one that is 4:4:4 (as gathered from WIkipedia and discussion with Aja). Hence, there is no SD 4:4:4 available for any SDI card (i.e. all Kona cards).
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I’ve been researching SD (standard def) capture further and have learned that the SDI (Serial Digital Interface) 4:4:4 protocol is is an HD spec (called dual-link). In other words, a SD source to a Kona converter (HD10AVA, IO, etc) with Kona 3 card yields a 4:2:2 SD capture. That is why the Kona LSe is 4:2:2 – that is the best native sampling for SD SDI.
However, if one captures the SD footage via the Kona 3 using dual-link SDI the card will upsample the footage to an HD 4:4:4 spec. However, I believe it would scale the footage (though maintaining the aspect ration) in the process. Yes? Is there an option to capture the SD without any scaling (i.e. small image say 640×480 within a 1080 frame)? Then I would crop from there (minding field issues) resulting in an acceptable 4:4:4 SD capture process and file. Is this at all possible? If not, scaling is unacceptable. Instead, I would research the possibility of a turnkey system which digitizes SD analog at 4:4:4 and then barring that will likely accept capturing at 4:2:2 via either the Kona 3 with a Kona converter or via the Kona LSe.
p.s. thanks David for the BitJazz codec which I’m famiiar with. I’m still researching codecs suitable for a preservation project. I suspec I will opt for Animation as it is stable/mature (i.e. likely to be around longer than BitJazz)
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Hi Bob,
I’m not concerned with “improving” or upconverting any footage; I want to retain as faithfully as possible the information that is there. I want to minimize any errors, compression artifacts, or scaling to the transcoded footage. The intent is to transfer the content to a newer and more stable carrier while preserving the technical nature of the content, using the best available hardware to minimise the signal deterioration usually connected with the transfer of the content. Yes, I expect some of the footage to be quite poor (some are early 70’s, degraded 3/4″ tapes), but regardless I want that information! This is in short a digital preservation job.
The Kona 3 looks to be a good choce for the DigiBeta material, but not for the analog material as this card is SDI only …
I will be capturing to SATA Raids and storing each asset either in multiiple offline SATA drives or in an external SATA Raid.
Mark