Shaun Roemich
Forum Replies Created
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Are you talking about a passive hdmi splitter like the dslr folks use to monitor on camera and in video village or a powered hdmi distribution amp?
I wouldn’t expect a passive device to work either in your application but a powered DA not working would seem weird to me.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
DNxHD at 36mbps and MPEG–2 at 36mbps ate COMPLETELY different animals.
One is an Intraframe compressed codec, one is Interframe. BIG difference!
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
It is hardware (in the hdmi on the player), not the software (disc).
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
You can’t. The hdmi output of the bluray player is protected by HDCP.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
The ATEM doesn’t have any scalers. all inputs need to be the same resolution and frame rate.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
Why block it? Because consumer devices like Blu-Ray players and DVD players are commonplace and HDMI was “sold” as a simple, one cable, high quality digital connection for the masses. Multiples of one type of connector on your TV instead of various S-Video, composite, component blah blah blah…
Then the Big Guys decided that the possibility of people making high quality copies was so great, they needed to CRIPPLE the pipeline by forcing a ridiculous negotiation to ensure the downstream device was not a record-enable device before passing the signal.
Now, I don’t know if you’ve tried to buy a Blu-Ray player in recent history that has component… I have and I CAN’T. I need one for multi-camera live switched scenarios where I AM displaying my own (or my client’s own) content. HDMI won’t pass the signal as the downstream device CAN’T send a “I’m ONLY a display” communication.
Anyway…
The powers that be RUINED a perfectly good signal chain of uncompressed digital video (and audio) signal.
BUT…
That has nothing to do with your issue, which I pointed out.
Actually, I DID share some wisdom by pointing out that your issue WASN’T HDCP related and gave you three places to look instead: resolution, frame rate and hardware/software.
SInce I don’t recall getting a pay cheque, I’m pretty sure I pointed out what it WASN’T and helped narrow down what it WAS…
Not bad for free, don’t you think? The Genius Bar probably wouldn’t have given you any better advice…
Sarcastic? Yes.
Snotty? Maybe. Just like your response.
And I shall have a good day.
BTW, what did the issue turn out to be?
Share with the class.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
Actually, you DON’T understand the “nonsense about HDCP” if you don’t understand the difference between recording from component and hdmi. Component doesn’t (and can’t…) carry HDCP, which is specific to hdmi.
Your problem as you explain it APPEARS to have nothing to do with HDCP to me. It seems to be more of a frame rate, resolution or software/hardware failing.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
I understand completely Richard, as someone who used to fabricate all his own cables “back in the day”…
The “formulation” of a specific cable of course figures in shielding, capacitance and resistance and how it attenuates specific frequencies over a given length. The Belden 1505a (RG 59) and 1694 (RG6) are optimized for HD-SDI implementations.
Satellite cable is built for it’s specific properties and I’m pleasantly surprised to hear you have had such luck. Again, we are talking about THEORETICAL limits here… The point beyond which the signal is sufficiently attenuated so as to no longer meet “spec” and may fail to pass the required “peaks and valleys” adequately. There are also many factors into what the initial signal integrity is in the first place: at NAB, there was a matrix router manufacturer that was showcasing a LONG length of cable (post matrix router) which was showing proper burst on a scope even after approximately 450 METRES. (my dear American friends, 1 metre equals 39 inches) So well in excess of 3 times the theoretical limit of the cable, which I believe was 1694.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
Remember that HD-SDI has a cable length limit that changes depending on cable used, both cable gauge (RG59 or RG6) and by cable type/ballistics…
I’m sort of surprised Richard is getting signal integrity at 300 feet with CHEAP RG6… but RG6 IS more “forgiving” than RG59, at the cost of heavier, stiffer cable…
Belden 1505a, which my system will eventually be built around, has a theoretic limit at 1.5GHz of 300 feet and is considered a “premium” cable for HD-SDI use.
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com -
If memory serves, Teradek is advertising 120ms delay, which is about 4 frames at 60i. Enough to notice if cut against the same subject in a multi camera live switched scenario. Of course, if all you are looking for is long distance monitoring, that may be good enough. I have seen it in operation and certainly wouldn’t use it to pull focus or anything… Again, fit for purpose depends on what your actual application is…
Big Dog – Technical Director – Switcher
Road Dog Media – Vancouver, BC Canada
roaddogmedia@gmail.com