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Re: HDMI & HDCP

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Paul wrote:
> On Mon, 4/14/2025 8:59 AM, Ed Cryer wrote:
>> Paul wrote:
>>> On Sun, 4/13/2025 3:05 PM, Ed Cryer wrote:
>>>> I have an Apple TV. I recently installed Channel4 and ITVX apps on it, but with strange results. The picture is blank, but sound and subtitles are ok; as is picture on advertisements.
>>>> BBC iPlayer, YouTube, VLC etc work just fine.
>>>>
>>>> This apparently has something to do with DRM. I think I need an HDCP-compatible cable, but my best attempts at googling haven't discovered one.
>>>>
>>>> Ed
>>>
>>> This is info from three years ago.
>>>
>>> https://www.reddit.com/r/tvPlus/comments/ygrtwv/apple_tv_on_windows_not_playing_hd_or_4k_is_not/
>>>
>>>      "Playing protected content at 1080p or higher requires a protocol called HDCP 2.2.
>>>       Most monitors, laptops and tablets sold today are compatible with this standard and
>>>       should be able to stream without issues. 4K content, on the other hand, requires both
>>>       HDCP 2.2 and HEVC codec to work. The latter needs the user to buy a $0.99 extension
>>>       in the Microsoft Store.
>>>
>>>       HEVC is currently supported by only one Windows browser: Microsoft Edge.
>>>       While Apple TV+ works using Google Chrome and Mozilla Firefox, the resolution
>>>       and bitrate may not be the best.
>>>      "
>>>
>>> It seems a kind of pessimistic proclamation. At a guess, at my house, I could
>>> only meet this, by going out and buying a new 4K display device, and then it
>>> would provide the display end. If I were to buy just an HD monitor (1920x1080),
>>> the manufacturer might not feel the need to implement the latest standard.
>>> But higher res monitors can be so whizzy, you need a new video card to
>>> keep up with them.
>>>
>>> While this sounds nasty, enough of your setup is working, it's likely as you surmise,
>>> to be a video card to monitor issue of some sort. Not a whizzy enough standard being used.
>>>
>>> https://en.wikipedia.org/wiki/Protected_Media_Path
>>>
>>> You can see the hits just keep on coming here. Maybe 2.3 is secure ? Maybe ?
>>>
>>> https://en.wikipedia.org/wiki/High-bandwidth_Digital_Content_Protection
>>>
>>>      Paul
>>
>> Thanks for that, Paul.
>> There's a crazy pattern of things that do work and things that don't.
>> Channel4 works on all Windows computers that I have. They need Widevine installed in Firefox, but the monitors don't object; a Samsung TV, a JVC TV, a laptop monitor all work ok.
>> The app works on my iPad, iOS; but when I screen-mirror to the Apple TV both displays go blank.
>>
>> The Apple TV is plugged into a Panasonic 48" TV.
>> So then, which device is the culprit? It's either the Apple TV or the Panasonic.
>>
>> Ed
>>
> 
> I would check the HDCP (High Definition Content Protection) version of the Panasonic.
> 
> The Apple TV likely feels quite comfortable on its end. But for a protected
> path, it needs confirmation the display implements a secure protocol. And you
> can see in Wikipedia, the nibbling away at HDCP version continues.
> 
> Companies can do one of two things. They can pretend to care.
> Or, they can care. Some companies, go the extra mile to
> inconvenience users, so that there is absolutely no chance
> of being sued or charged under some law. For example, when you buy
> Philips brand equipment, if DRM is involved, it's "vacuum sealed and air tight".
> some other brands, a few "special key presses" and the facade falls off :-)
> 
>     Paul

I got it working, despite the Panasonic online chat help having failed.
He told me to 1. Unplug everything for 5 minutes; 2. Reboot router; 3. 
Try another HDMI cable. Plus a few other things.

I sat back and had a think; then I tried putting the Apple TV on a 
different HDMI input channel to the Panasonic, and bingo! It works.

Ed

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Thread

HDMI & HDCP Ed Cryer <ed@somewhere.in.the.uk> - 2025-04-13 20:05 +0100
  Re: HDMI & HDCP Paul <nospam@needed.invalid> - 2025-04-13 17:15 -0400
    Re: HDMI & HDCP Ed Cryer <ed@somewhere.in.the.uk> - 2025-04-14 13:59 +0100
      Re: HDMI & HDCP Another John <invalid@invalid.invalid> - 2025-04-14 16:57 +0000
      Re: HDMI & HDCP Paul <nospam@needed.invalid> - 2025-04-14 18:49 -0400
        Re: HDMI & HDCP Ed Cryer <ed@somewhere.in.the.uk> - 2025-04-15 10:52 +0100
          Re: HDMI & HDCP Ed Cryer <ed@somewhere.in.the.uk> - 2025-04-15 11:05 +0100
            Re: HDMI & HDCP Paul <nospam@needed.invalid> - 2025-04-15 08:22 -0400

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