OT: capture cards HDMI or SDI?

Jul 10, 2007 at 3:11pm

OT: capture cards HDMI or SDI?

Hi
If you had a Matrox MXO that can output from DVI via a cable converter to HDMI or straight to SDI what would you choose and why?

I want to get a capture card that will grab the best quality I can throw at it. My jitter work is made up of 1080i sized HDV. Is SDI better?

my set-up will be something like G5 DVI output into Matrox MXO then off to a capture card like the Black Magic Intensity or Deck-link with SDI input.

#32827
Jul 10, 2007 at 4:30pm

>

Search this list archive for discussion of the Blackmagic Intensity
card… its actually possible to go directly from DVI-D to the
intensity with an HDMI adapter (cheap)

no need for an MXO.

-deKam

> Hi
> If you had a Matrox MXO that can output from DVI via a cable
> converter to HDMI or straight to SDI what would you choose and why?
>
> I want to get a capture card that will grab the best quality I can
> throw at it. My jitter work is made up of 1080i sized HDV. Is SDI
> better?
>
> my set-up will be something like G5 DVI output into Matrox MXO then
> off to a capture card like the Black Magic Intensity or Deck-link
> with SDI input.
> –
> Some links to my stuff n that :-) http://zappa.tvu.ac.uk/~crohumaa/
> CV/cv.php
>
>

#108593
Jul 10, 2007 at 5:14pm

Yup I had already checked the threads on this list and knew that you can go DVI>HDMI>Intensity. Matrox MXO will give me a few advantages over just a straight capture. So my question really is can you think of any reason why DVI>HDMI would be better than SDI>SDI. I want to go with SDI so I can preview on a second monitor without having to unplug the DVI to connect it to the HDMI input of the Intensity card when captuing.

I know I sound like I have answered my own question but just wanted to keep my options open. Anyone on this list capturing from SDI output via Matrox MXO?

Am I going in the right direction? I think I might be but just don’t want want to fall down any holes in my knowledge.

#108594
Jul 10, 2007 at 5:32pm

the only two issues with the mxo/sdi route are (significant) extra
cost & color depth
you could get around your cabling convenience issue easily with a 1×2
DVI DA box.

colordepth:
SDI is going to be 4:2:2
while DVI should be full 4:4:4 (afaik but I could be wrong)

cost: mxo+decklink sdi = $1500 +++ (depending on sdi card)
dvi da + intensity + adapter = $750
so less then half the cost & better color depth.

but both will certainly look great.
a pro with SDI is that its more standard workflow with decks and
mixers etc.

-deKam

> Yup I had already checked the threads on this list and knew that
> you can go DVI>HDMI>Intensity. Matrox MXO will give me a few
> advantages over just a straight capture. So my question really is
> can you think of any reason why DVI>HDMI would be better than
> SDI>SDI. I want to go with SDI so I can preview on a second monitor
> without having to unplug the DVI to connect it to the HDMI input of
> the Intensity card when captuing.
>
> I know I sound like I have answered my own question but just wanted
> to keep my options open. Anyone on this list capturing from SDI
> output via Matrox MXO?
>
> Am I going in the right direction? I think I might be but just
> don’t want want to fall down any holes in my knowledge.

#108595
Jul 10, 2007 at 5:58pm

So even if I already have an MXO I will do better to get an HDMI capture card like the Intensity. The Deklink for HD stuff IS expensive. I think my problem is I do not really understand about SDI. For example if I am outputting HD1080i to the MXO what comes out of its SDI? I think that I would need the HD version of the Decklink to be able to capture HD via the SDI out maybe.

Would a 1×2 DVI DA box (is that like a splitter?) compromise the quality at all? Do you mean one would go to HDMI capture and the other to a monitor. I guess its digital. So no. Yes, That sounds like a great solution, and I get the colour depth.

I hope this helps others like me! Thanks Johnny

#108596
Jul 10, 2007 at 6:13pm

The intensity card samples HDMI @ YUV 4:2:2, so that advantage is
lost, but christ you cant beat the cost. $250 a pop!

On Jul 10, 2007, at 1:32 PM, dekam wrote:

> the only two issues with the mxo/sdi route are (significant) extra
> cost & color depth
> you could get around your cabling convenience issue easily with a
> 1×2 DVI DA box.
>
> colordepth:
> SDI is going to be 4:2:2
> while DVI should be full 4:4:4 (afaik but I could be wrong)
>
> cost: mxo+decklink sdi = $1500 +++ (depending on sdi card)
> dvi da + intensity + adapter = $750
> so less then half the cost & better color depth.
>
> but both will certainly look great.
> a pro with SDI is that its more standard workflow with decks and
> mixers etc.
>
> -deKam
>
>
>
>
>> Yup I had already checked the threads on this list and knew that
>> you can go DVI>HDMI>Intensity. Matrox MXO will give me a few
>> advantages over just a straight capture. So my question really is
>> can you think of any reason why DVI>HDMI would be better than
>> SDI>SDI. I want to go with SDI so I can preview on a second
>> monitor without having to unplug the DVI to connect it to the HDMI
>> input of the Intensity card when captuing.
>>
>> I know I sound like I have answered my own question but just
>> wanted to keep my options open. Anyone on this list capturing from
>> SDI output via Matrox MXO?
>>
>> Am I going in the right direction? I think I might be but just
>> don’t want want to fall down any holes in my knowledge.

v a d e //

http://www.vade.info
abstrakt.vade.info

#108597
Jul 10, 2007 at 6:14pm

The intensity card samples HDMI @ YUV 4:2:2, so that advantage is
lost, but christ you cant beat the cost. $250 a pop!

On Jul 10, 2007, at 1:32 PM, dekam wrote:

> the only two issues with the mxo/sdi route are (significant) extra
> cost & color depth
> you could get around your cabling convenience issue easily with a
> 1×2 DVI DA box.
>
> colordepth:
> SDI is going to be 4:2:2
> while DVI should be full 4:4:4 (afaik but I could be wrong)
>
> cost: mxo+decklink sdi = $1500 +++ (depending on sdi card)
> dvi da + intensity + adapter = $750
> so less then half the cost & better color depth.
>
> but both will certainly look great.
> a pro with SDI is that its more standard workflow with decks and
> mixers etc.
>
> -deKam
>
>
>
>
>> Yup I had already checked the threads on this list and knew that
>> you can go DVI>HDMI>Intensity. Matrox MXO will give me a few
>> advantages over just a straight capture. So my question really is
>> can you think of any reason why DVI>HDMI would be better than
>> SDI>SDI. I want to go with SDI so I can preview on a second
>> monitor without having to unplug the DVI to connect it to the HDMI
>> input of the Intensity card when captuing.
>>
>> I know I sound like I have answered my own question but just
>> wanted to keep my options open. Anyone on this list capturing from
>> SDI output via Matrox MXO?
>>
>> Am I going in the right direction? I think I might be but just
>> don’t want want to fall down any holes in my knowledge.

v a d e //

http://www.vade.info
abstrakt.vade.info

#108598
Jul 10, 2007 at 7:34pm

>

DA box (short for Distribution Amplifier) is like a splitter yes, but
its active & makes an exact copy of the signal… so no loss.

imho – If you plan to use other SDI gear at some point, like renting
or buying an HD deck, a Canon XH-G1 etc + and you already own the
MXO, it might make the most sense to complete your setup with SDI.

Or you could sell your MXO and have the extra money to spare… use
it to get an HDV camcorder with HDMI out, which would give you a more
rounded HDMI workflow. Or also remember that HD uncompressed capture
requires a good RAID, so you might need to invest something in this.

–deKam

> So even if I already have an MXO I will do better to get an HDMI
> capture card like the Intensity. The Deklink for HD stuff IS
> expensive. I think my problem is I do not really understand about
> SDI. For example if I am outputting HD1080i to the MXO what comes
> out of its SDI? I think that I would need the HD version of the
> Decklink to be able to capture HD via the SDI out maybe.

> Would a 1×2 DVI DA box (is that like a splitter?) compromise the
> quality at all? Do you mean one would go to HDMI capture and the
> other to a monitor. I guess its digital. So no. Yes, That sounds
> like a great solution, and I get the colour depth.

#108599

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