Gopro 2 and BM HDMI > SDI

Hello,



I connect 3 GoPro2 via HDMI to the ATEM TVS (1080i50). Works perfect.
Then I connect one of the GoPros to a BM Mini Converter "HDMI > SDI" and connect the SDI output into the ATEM TVS. No signal.

What might be the reason?
Thanx a lot!
Martin

Which version of the HDMI->SDI miniconv do you have?

The mini-converter can handle 1080p, so that's what the GoPro defaults to.

You have two options:

1. Set the GoPro to 720p

2. Get a Geffen HDMI-Detective, which will make the GoPro force 1080i output.

There are a lot of topics about this issue. It seems that the edid info is not right with the converter.

There is no right solution yet, But i heard that a HDMI splitter can solve the problem in some cases. Just put the splitter between the gopro and the converter.

There are a lot of topics about this issue. It seems that the edid info is not right with the converter.

There is no right solution yet, But i heard that a HDMI splitter can solve the problem in some cases. Just put the splitter between the gopro and the converter.

I've got a GoPro HERO 3 Black with this converter and can't get output either despite HDMI lock. Are you saying the converter cannot detect the input signal properly from the GoPro HDMI?

Trying to run at 720p 60. Not really sure why this is so difficult.

Hi,

Have tested GoPro with:
DVI extender
HDMI to SDI converter (battery) and then using either of these with HDLinkPro and a Vaddio mixer

See http://forum.blackmagicdesign.com/viewtopic.php?f=18&t=4331

Haven't used it with ATEM so haven't needed to macth output to it but have found there are some fiddly things with GoPros, there was also a firmware update earlier this week which may make a difference

The problem lies within the HDMI handshake. The BMD converters don't really do a handshake, so the GoPro is sending it's default resolution and framerate (1080p30).

If the folks at GoPro would update the firmware and give you a choice of what to output (force 1080i), there wouldn't be an issue. This really isn't a BMD problem.

Now, some have had success using the HDMI Detective. What this does is it hooks directly up to the ATEM the first time, reads the handshake (ATEM asking for 1080i), and saves it. Then it connects in-between the GoPro and the HDMI-to-SDI converter. So when the GoPro asks for a type of output, the HDMI Detective tells it 1080i.

Like I said, some have had success with it, some haven't. You're basically making a $90 bet.

We have a GoPro Hero2 also, and want to use it with our ATEM. We just haven't taken the chance on the HDMI Detective yet. We're kind of waiting on something more concrete.

To me that all seems like a moot point. The issue I'm having is that I have set my GoPro HERO 3 Black to output 720p60. I've tested the HD-SDI signal on several Decklink cards (where I can really tweak expected input settings) and our For-A switcher. Nothing is picking up a signal from the converted GoPro signal despite the HDMI lock. I'm a bit baffled.

Kevin, you're talking about the Hero3, that's a totally different beast. The OP was asking about the Hero2.

This is my converter:

http://www.blackmagicdesign.com/product ... /techspecs

Thank you for your suggestions.
What Mike Squires says (handshake problem) looks most helpful to me.
I am "talking" to the BM support trying to get another solution

I'll let you know.

Thanks!
Martin

Kevin, you're talking about the Hero3, that's a totally different beast. The OP was asking about the Hero2.

Fair enough. New thread then.

Why am i asking?

From what i understand the GoPro doesn't do EDID right as people has mentioned. This however depends on the version of GoPro you have. Some versions work, some don't.

There is also the question of the converter. Blackmagic changed the FPGA in the HDMI->SDI with the introduction of the "Heavy Duty" converters and these converters HATE the GoPro. If you update the old, this also break the functionality. Our solution is that we keep an old converter that we don't update for GoPro.

The more I try and read/ the more it confuses me...
All newest updates.

My latest test:

- Gopro2 via HDMI into TVS IN1 (HDMI): works
- Gopro2 via HDMI into BM Hyperdeck Studio HDMI Input: works
- Gopro2 via BM Mini Converter, SDI out into BM Hyperdeck Studio SDI Input: works (!!)
- Gopro2 via BM Mini Converter, SDI out into TVS IN1 (SDI): WORKS NOT

W H Y N O T ???

There MUST be another way than HDMI Detective


THANKS!
Martin

i dont use gopro2's etc because they do not output 1080i only 1080 25p and is not compatible with 1080i standard to use these cheapies you need a standards converter which far outways the cost of the gopro my advice is to use real 1080i cameras. ( 1080 50p may work but gopro2 does not output this)
or set the whole system to 720p and the gopro should work

Technically, the GoPro 2 will output 1080i, it's just making it to do it when using the HDMI-to-SDI converter is problematic.

Ok this is what i could find out Gopro 2 outputs 1080 25 p unless it is told otherwise by what you are connecting it to ( Handshake stuff )
So when you connet it to a hdmi/hdsdi converter there is no handshake because hdsdi does not suport it and the gopro defaults to 1080 25 p.
Solution would be to use an EDID device inserted before the converter however i am unsure how much latency this will add to the signal chain, perhaps hdmi over cat 5 ( if it is a distance problem you have for not using the hdmi input on the ATEM )
Also note the cheap hdmi to hdsdi converters only output what is input and will not up scale or cross convert any signal what so ever , 25 p in = 25 p out
Hope this helps.
A wise man once told me Buy the right thing first time and avoid a cupboard full of junk

Set your Go Pro 3 to 120 frames. It will work then. 60 fps on Go Pro doesn't out out usuable signal.

120 does

Adding an EDID device in between does not add any delay as it are handshaking signals only from an internal EEPROM. The video signal is looped through in/out.

Set your Go Pro 3 to 120 frames. It will work then. 60 fps on Go Pro doesn't out out usuable signal.

120 does

Oh really?? I will test this. I'd love for this to work.

Instead of using a HDMI to SDI converter, use a HDMI to HDMI Cat5/6 extender, so you can run your cable to 90 or 150 ft. depending on your extender, avoiding the handshake trouble between the Gopro and the SDI converter

Instead of using a HDMI to SDI converter, use a HDMI to HDMI Cat5/6 extender, so you can run your cable to 90 or 150 ft. depending on your extender, avoiding the handshake trouble between the Gopro and the SDI converter

This doesn't work all the time, and really, not much of the time. We've tried it, with no luck.

To me that all seems like a moot point. The issue I'm having is that I have set my GoPro HERO 3 Black to output 720p60. I've tested the HD-SDI signal on several Decklink cards (where I can really tweak expected input settings) and our For-A switcher. Nothing is picking up a signal from the converted GoPro signal despite the HDMI lock. I'm a bit baffled.

Set your go pro to 120 fps. It will then output a correct signal. If you've updated your go pro firmware anytime soon. You'll notice a 4x3 image until your actually hit record.