Hi,

I posted this question already on BMD forum.
But maybe someone already experienced this issue?

I have a PC setup with one Decklink Duo 2 and the following components:

Canon Legria (Vixia) HF G30 -> BMD HDMI to SDI converter -> Decklink Duo 2 port
Canon Legria (Vixia) HF G40 -> BMD Hdmi to SDI converter -> Decklink Duo 2 port

I am not able to get a stable 1080p50 signal on any of the Decklink ports in Media Express. Sometimes a short picture flickering, but no stable video feed. When I switch the cameras to 1080i50 or 720p50 I have a stable feed on Media Express.

I changed:
SDI cables
BMD HDMI to SDI converters with liqoo HDMI to SDI converters
HDMI cable from cameras to converter.

When I plug both Canon cameras to my Samsung TV I get a stable 1080p50 image.
When I change one of the Canon HF cameras with a Canon EOS 80D DSLR I get a stable 1080p50 video feed on Media Express on PC.

So it's definitley the combination of Canon HF G30/G40 and Decklink Duo 2 with 1080p50.

I would appreciate any help.

Hi Guillaume,

Yes, I remember that Media Express shows "detected 1080p25" when I set cameras to 1080p50.
Mhh, but I am wondering why my Samsung TV tells me in the info box that it is a 1080p50 source?
And in the menue there's an output option for 50p, mmh. Very strange.

Andreas.

Sorry, my fault.
The Canon HDMI output menue does not contain any image rates. There's only 1080p, 1080i, etc. like you said. I misinterpreted the options.
I'll check HDMI Status info and report.
Thank you.

Andreas

I tried the HF G30 with Magewell XI100DUSB-HDMI this afternoon.

Using Dongle Helper (the magewell utility to check the signal) I was able to choose 1080p50 but I have no proof it is really p50.
Same with vMix, it accepts 1080p50 for this input but nothing proves it is really 50 fps.

Keep us posted...

Bis bald,
Guillaume

Hi Andreas

thanks for the feedback. I'm very surprised by this answer because I never saw Decklinks cards detecting 50p, but only 25p. Maybe it's 50PsF?

I'll check again. I have Declink Mini Recorder, Ultra Studio Thunderbolt and Decklink Duo 2.

Let me know if you achieve to get 50p from Canons or get an answer from BMD.
Guillaume

Yep this might be the reason I agree. That's also what I said before having 1080p50 with direct HDMI thru Magewell dongle. I doubted it was really 1080p50 but why not after all?
Too bad I can't try with Atem, I have first version that won't support 1080p50, only 1080i50.

I did more testing with HF G30 and several HDMI2SDI converters to a BMD Decklink Duo 2.
Camera set to 1080p50 for recording options, HDMI out set to 1080p

- With BMD Mini Converter (old model the big one) I get 1080p50 stable either in Desktop Video Utility and vMix
- With BMD Mini Converter (new model the small one) I get 1080p50 stable either in Desktop Video Utility and vMix
- With Chinese Converters (many brands, the black cheap models from ebay or amazon) I get 1080p25 everywhere

One thing is curious: Activating the Cinema mode when in 1080p50 switches to 1080i50 on screen but Desktop Video Utility still shows 1080p50.
I read somewhere that Cinema mode was limited to 25p (which is coherent for cinema when this cam cannot do 24p).
This is very confusing.

But in the end yes, 1080p50 is possible even with BMD converters and SDI cables.

I did not try with different HDMI cables between the cam and the converters. This could also interfere with frequency support.

Guillaume

Hi Andreas

yes you understood correctly. Using BMD converters with a HF G30 (correctly set) I have stable 1080p50 inside vMix through a BMD Decklink Duo 2.
Make sure Cinema Mode is not interfering with the output.

Guillaume

A little research gave me this page: https://www.atomos.com/cameras/canon-hf-g30

Which states that the output resolution for 1080 is 25p / 30p (and 50i / 60i).

When going down to 720p it supports 50p and 60p.

It is not an official Canon page, but i bet that Atomos is pretty reliable.

I recommend using Canon G30 HDMI output in 720p50/60 for high-motion footage like sports.

/ Jens Stigaard

Hei Guillaume,

thank you very much for your response and this great video... :)
Sorry for coming back so late but I was very busy.

Unfortunately I am not able to get 50p working with your hints.
I tried it exactly the why you did but I have no luck and no more ideas.

I wonder why it works with you.

Mach's gut. :)
Andreas