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No its a DRM issue, its why I run a hidden 25 foot HDMI from my computer to my TV as some broadcasts require the security inside the HDMI cable itself. (I could

No its a DRM issue, its why I run a hidden 25 foot HDMI from my computer to my TV as some broadcasts require the security inside the HDMI cable itself. (I could be wrong on this one but Widevine DRM handles this process I think)

js2 3y ago
There is no security inside the HDMI cable itself. It's an HDCP negotiation between the source and the sink which occurs over an i2c serial bus along the pair of DDC pins. You may be able to get away with just an HDMI dummy plug: https://www.amazon.com/4K-HDMI-Dummy-Plug-3840x2160/dp/B07FB8GJ1Z https://www.amazon.com/4K-HDMI-Dummy-Plug-3840x2160/dp/B07FB... I'm not sure if these dummy plugs handle HDCP. If not you can use one in combination with this splitter: https://www.amazon.com/Splitter-l-b-y-Vision-Atmos-Scaler/dp/B07VP37KMB https://www.amazon.com/Splitter-l-b-y-Vision-Atmos-Scaler/dp... I own this splitter and know for a fact that it handles the HDCP negotiation. But I think it needs a display attached.
- esperent 3y ago
  > You may be able to get away with just an HDMI dummy plug Or, you can just pirate it and not have to put up with any of this BS.
  - deleted 3y ago
    [deleted]
- walteweiss 3y ago
  What is an HDMI dummy plug? I read the description, but didn’t get it. What does it do?
  - js2 3y ago
    It makes the source think there is a display connected by responding with an EDID block. It may also handle the HDCP negotiation but I'm not sure about that. Technically an unlicensed device isn't supposed to be able to implement HDCP so while the Chinese manufacturers are totally willing to skirt around that, they also don't go advertising it.
    - walteweiss 3y ago
      But why would one need it? I don’t get get idea behind it, what’s with me having a fake extra display? Is it somehow tricks the DRM or what?
      - js2 3y ago
        The primary use case I'm aware is for headless computing. Re-reading what ladzoppelin wrote, I made an assumption that was probably incorrect. I thought they were saying that having an HDCP-compliant TV attached allowed them to watch DRM-protected content on their non-HDCP-compliant primary display. But in retrospect, probably they are watching the DRM content on the TV. In that case they don't need an HDMI dummy plug at all. They could instead use the splitter I linked between their computer and the non-HDCP compliant display (assuming it's connected over HDMI and not DisplayPort) to fool their computer into thinking the display is HDCP-compliant. Then they can play the DRM content on either their primary display or the TV.
        walteweiss 3y ago
        Thank you for your explanations!
- jasomill 3y ago
  The GP was trying to play back Amazon DRM content via AirPlay, so HDMI/HDCP should only be relevant to the "last-mile" connection between the AirPlay receiver and an external display (so, if the receiver is a Mac laptop's internal display or a smart TV, not at all). AFAIK, DRM video playback over AirPlay only works from within iOS apps that explicitly support AirPlay[1], not via generic iOS/macOS screen mirroring. [1] https://support.apple.com/en-us/HT204289#iOS https://support.apple.com/en-us/HT204289#iOS
  - js2 3y ago
    That's true but my reply was solely to ladzoppelin where they seem to need to have an HDCP-compliant display connected. I was just offering an option besides a 25 ft HDMI cable.
- offices 3y ago
  If the DRM means you need a workaround, it's a DRM issue.

js2 3y ago

There is no security inside the HDMI cable itself. It's an HDCP negotiation between the source and the sink which occurs over an i2c serial bus along the pair of DDC pins. You may be able to get away with just an HDMI dummy plug: https://www.amazon.com/4K-HDMI-Dummy-Plug-3840x2160/dp/B07FB8GJ1Z https://www.amazon.com/4K-HDMI-Dummy-Plug-3840x2160/dp/B07FB... I'm not sure if these dummy plugs handle HDCP. If not you can use one in combination with this splitter: https://www.amazon.com/Splitter-l-b-y-Vision-Atmos-Scaler/dp/B07VP37KMB https://www.amazon.com/Splitter-l-b-y-Vision-Atmos-Scaler/dp... I own this splitter and know for a fact that it handles the HDCP negotiation. But I think it needs a display attached.

esperent 3y ago
> You may be able to get away with just an HDMI dummy plug Or, you can just pirate it and not have to put up with any of this BS.
- deleted 3y ago
  [deleted]
walteweiss 3y ago
What is an HDMI dummy plug? I read the description, but didn’t get it. What does it do?
- js2 3y ago
  It makes the source think there is a display connected by responding with an EDID block. It may also handle the HDCP negotiation but I'm not sure about that. Technically an unlicensed device isn't supposed to be able to implement HDCP so while the Chinese manufacturers are totally willing to skirt around that, they also don't go advertising it.
  - walteweiss 3y ago
    But why would one need it? I don’t get get idea behind it, what’s with me having a fake extra display? Is it somehow tricks the DRM or what?
    - js2 3y ago
      The primary use case I'm aware is for headless computing. Re-reading what ladzoppelin wrote, I made an assumption that was probably incorrect. I thought they were saying that having an HDCP-compliant TV attached allowed them to watch DRM-protected content on their non-HDCP-compliant primary display. But in retrospect, probably they are watching the DRM content on the TV. In that case they don't need an HDMI dummy plug at all. They could instead use the splitter I linked between their computer and the non-HDCP compliant display (assuming it's connected over HDMI and not DisplayPort) to fool their computer into thinking the display is HDCP-compliant. Then they can play the DRM content on either their primary display or the TV.
      - walteweiss 3y ago
        Thank you for your explanations!
jasomill 3y ago
The GP was trying to play back Amazon DRM content via AirPlay, so HDMI/HDCP should only be relevant to the "last-mile" connection between the AirPlay receiver and an external display (so, if the receiver is a Mac laptop's internal display or a smart TV, not at all). AFAIK, DRM video playback over AirPlay only works from within iOS apps that explicitly support AirPlay[1], not via generic iOS/macOS screen mirroring. [1] https://support.apple.com/en-us/HT204289#iOS https://support.apple.com/en-us/HT204289#iOS
- js2 3y ago
  That's true but my reply was solely to ladzoppelin where they seem to need to have an HDCP-compliant display connected. I was just offering an option besides a 25 ft HDMI cable.
offices 3y ago
If the DRM means you need a workaround, it's a DRM issue.