interceptor121

The shogun flame also has and SDI input so it should work too i guess

Well the situation of displays is still not defined vesa has come up with displayhdr but that is mostly for HDR gaming and Tv have UHD premium the rest is not defined looking at the requirements for color the standards only need 90% of DCI-P3 color which looks in reach for macs with retina display while for the brightness the screen appears in line with vesahdr 400 which is the bottom line of displayhdr requirements obviously this is not a reference set up but potentially a good enough set up if you work with curves there is a range check feature that looks interesting to check luminance and colour

There was no difference on the demo files it may be possible that the source files were not HDR I did not check The colour looked ok though when shifting profiles on the screen compared with my 2011 mac where it turns purple on 2020 the screen is 540 nits peak brightness that is not bad in absolute terms but maybe the blacks are not black like an OLED it was not possible really to see anything as the shop is bright The machine looked fine in terms of processing for 4K with the 8GB vram. Do you have that one?

I was at the apple store today and I had a go at the top of the range iMac with radeon pro 580 8Gb VRAM i opened final cut and the 4K demo in it with wose gamut and the performance was great not stuttering during rendering in terms of colours there was no difference using or not the option show HDR value as RAW i had a play with the color profile of the screen and when changing to bt2020 there was no significant shift this machine with the 2TB fusion drive and additional RAM seems to be a good option for 4K HDR editing with final cut anybody has done some proper stress testing??

In theory the GPU does the rendering while the RAM holds the rest. When you run out it writes on disk ao at that point it will slow down. Read the requirement section of davinci it is pretty detailed on Mac OSX davinci is resource hungry. Version 15 refuses to start working if VRAM is less than 4GB while final cut runs with 1GB. Maybe it is isx but it doesn’t look like the code is particularly optimised

Make sure you GPU has at least 4GB RAM as resolve requires it in the new version. Also an SSD Drive makes they difference when the memory pages to the drive

I would not buy a cable without specifications. A cable is not HDMI 1.4 or 2 is standard fast or ultra fast. Premium fast £20 is as far as I would go. Then if it breaks you can buy another 3 by the time you get to £80

If you look on the rocketfish $20 cable it says HDMI premium which is what I mentioned The list if certified vendors is here https://www.hdmi.org/learningcenter/Premium_HDMI_Cable_Participant_List.aspx None of Sony or Apple or other major brands directly manufacturers cables so whatever you buy is almost guaranteed to be made in China I would say $20 is pretty high already for something that costs couple of dollars to make but if you have the right ergomics would be OK I personally would not spend more than that and the GH5 manual simply recommends a high speed cable so it is not going above the 18 GBPS Speed If you look at the atomos one which is coiled I doesnt even specify a bandwidth and atomos is not HDMI premium certified their cable despite the brand trust doesn’t provide the only piece of information that is actually mandatory on the GH5 manual. Is that not weird? And the other length is $29.99? In UK is £16.45 and review rating is average to low Atomos ATOMCAB010 HMDI Coiled Cable, Full HDMI to Full HDMI https://www.amazon.co.uk/dp/B00NUPYNUU/ref=cm_sw_r_cp_api_wF-oBbEBYXC67

HDMI cables are not rocket science and are consumer items so they are cheap it is up to the op to spend $10 for a cable a bit longer than needed or spend $50 for another that may have better ergonomics but has exactly the same performance that reminds me of discussions on analog speakers cables and what a difference they made on hi fi sound quality however HDMI is digital signal so the whole idea that you need to spend a fortune on cables doesn’t really apply to signal quality is more build quality and robustness

What am getting at is that performance wise the amazon cable $5 is the same of $100 gold plated the specs are the same the difference may be in build quality and how rugged the cable is not if it can or not support the data stream or hrmi 1.4 vs 2 or 2.1 so it is not necessary to buy any special cable you just need a high speed HDMI OMARS Premium Certified HDMI Cable 1m Ultra Speed High Support 21Gbps 4k@60Hz (HDMI V2.0b) https://www.amazon.co.uk/dp/B01MDTOA8R/ref=cm_sw_r_cp_api_JeZoBbG2W1AY4 £7.99

HDMI cables are not aligned to adapters they are just cables https://www.hdmi.org/consumer/finding_right_cable.aspx Then the build quality may differ but there isn’t a 2.0 cable or 2.1 there is high speed and ultra premium certified are high speed cables with special protection for EMI

Panasonic says you only need am high speed HDMI cable however there are certified premium high speed HDMI cables as well cost around £20 here in UK. There are only three types of HDMI cables standard, high speed and ultra high speed. High speed supports up to 18 gbps and I doubt you need more although hdmi connectors have versions 1.4 2.0b 2.1 the cables do not follow the same logic so don’t get ripped off

I found some interesting information on AMD website https://www.amd.com/Documents/polaris-whitepaper.pdf In essence Apple computers based on radeon pro technology (macbook pro and iMac) have a GPU capable of HDR (PQ transfer function not HLG) however they lack a port to connect to an HDR display as mentioned in the previous post (needs Intel JHL7x40 thunderbolt IO chip that costs $10) In addition iMac display have 540 nits brightness and 1200:1 contrast ratio so can support 10 stops dynamic range. If apple upgrades the controller it should be possible to connect directly a displayport 1.4 device and grade HDR PQ content Still unclear about HLG from the graphic card point of view and also from IO point of view the graphic card would support HDMI 2.0b...??

As far as I can see this is going to be more a bus issue. There are now standards for HDR monitors and Tv however the graphic adapters are limited to windows and HDR-10 on HDMI currently For mac you do need the new thunderbolt bus chips or there won’t be any option for HDR without an external converter that has displayport 1.4

Update for mac users HDR requires displayport 1.4 and the 2016 or 2017 macs have only 1.3 support through thunderbolt alpine ridge. Intel has released the new titan ridge in January that supports 1.4 when this gets incorporated the new macs will have HDR through thunderbolt so not the right time to rush into new purchases!

Link to the technical specifications https://www.philips.co.uk/c-p/436M6VBPAB_00/momentum-4k-hdr-display-with-ambiglow/specifications this is not a grading monitor per se and sells at less than £1,000 The primary issue is the lacknof an SDI input and the fact that the displayport is only 1.2 therefore HDR comes from HDMI 2.0 or USB-C DP alt mode. The latter may be interesting if it gives displayport 1.4 but am not sure If you have a windows computer running HDMI out of graphic card this may be very interesting for mac users need to understand if a thunderbolt 3 to HDMI cable can carry HDR and what is supported

After careful consideration I am dropping the idea of using those devices for editing if you look carefully thought the peak brightness of the atomos is high the contrast ratio is still 1000:1 therefore the screen has 10’stops dynamic range which is not sensational. The monitors also take Bt2020 but only display rec709. In conclusion it is better to use a screen with DCI-P3 colors and the same or better contrast ratio philips has released a new monitor with contrast ratio 4000:1 and peak 1000 nits that costs less than the atomos and supports HDR10 on windows and is certifies UHDA Not working with mac though.:.

@jonpais Samuel at mystery box has confirmed the Sumo 19M works great through SDI with the black magic ultra studio mini monitor So this is the way forward for me

I wrote Atoms in any case I can rent a Sumo 19M and test it before buying anything HLG does not have metadata so in theory this could work How do you know if your Shogun is playing HLG when connected like this?

They say sumo 19m is excellent for HLG which is what I am after I will ask them

Any idea if this set up works with the sumo 19m monitor? I don’t see myself using a recorder and rather have more screen

Thanks Jon All in all am happy then as I can re-use my 2011 iMac with FCPX It won’t run DaVinci 15 but it will run DaVinci 14 as I have only 1GB vram Do you know if Da Vinci 14 is capable of the same or am I limited to FCPX?

Am wondering though if you really need thunderbolt 3 as the signal is only 1080p at best out of the BMD monitor converter so potentially this works also with other older macs??

OK I finally got what jonpais meant Basically there is no way to output a proper HDR signal without a device from a Mac as the graphic adapter is not capable of HDR output At that point you are in the territory of thunderbolt 3 connections (as the others don't have enough bandwidth to support the signal) here you can either spend top dollar and then use HDMI or try to output to SDI using a device that has the port like the Shogun Inferno as a monitor. This looks like the most affordable option especially if you bought the inferno as recorder

I have read the davinci manual (only for studio version) so it says you can send metadata over HDMI to an HDR-aware video display through HDMI 2.0A but this is not what you are doing you are connecting through the SDI port which is interesting but I rather use my tv than a 7” screen Mmm