4 ms·

Which cards strip modern HDCP?

ec109685 2y ago
Something like this produces a clean hdmi stream: ViewHD 2 Port 1x2 Powered HDMI 1... https://www.amazon.com/dp/B004F9LVXC?ref=ppx_pop_mob_ap_share https://www.amazon.com/dp/B004F9LVXC?ref=ppx_pop_mob_ap_shar...
- mike_hearn 2y ago
  That page doesn't make any mention of HDCP stripping, and says it can only work up to 1080p anyway which isn't hardware protected to begin with. Where is the evidence this device strips HDCP?
  - ec109685 2y ago
    I can’t remember where it was referenced from, but you can see in the reviews too that it strips HDCP. Good point on it not being 4k though.
kuschku 2y ago
https://aliexpress.com/item/1005003020587234.html https://aliexpress.com/item/1005003020587234.html
- mike_hearn 2y ago
  That device makes no mention of stripping HDCP and I can't find any evidence it does that on the maker's website. What makes you think it will strip HDCP?
  - kuschku 2y ago
    > I can't find any evidence it does that on the maker's website. I believe that's intentional (it would be illegal to import if it was advertised). > What makes you think it will strip HDCP? I've got 6 in use for lecture/talk recording without worrying about HDCP. Especially useful for presenters casting to chromecast or presenters using macbooks with DRM software (as blackmagic SDI converters don't support HDCP at all)
    - mike_hearn 2y ago
      But lectures probably aren't DRM protected? HDCP isn't always on.
      - kuschku 2y ago
        You'd think so, but it's not even close to true. For example Macs and RedHat systems require HDCP if you've used Spotify or Apple Music since the last reboot (which applies to most speakers). Some Chromebooks can't provide direct display out but cast to a ChromeCast instead, which also always requires HDCP. We've also had talks on media and cultural studies which use a clip from e.g. a Netflix or Amazon Prime show as part of their talk. HDCP is almost guaranteed in this case. If your HDMI chain signals that it can't handle HDCP, some computers will obey that (and downgrade or stop playback). But most broadcast HDMI tech can't even signal that HDCP is unavailable, so you'll get HDCP by default. That's why every major venue, university or event has HDCP killers stockpiled. For 1080p60 that used to be cheap chinese HDMI splitters, nowadays it's mostly these Hagibis cards. If they're really fancy they'll have an HD Fury with HDCP removal license, but those cost ~$600.

Something like this produces a clean hdmi stream: ViewHD 2 Port 1x2 Powered HDMI 1... https://www.amazon.com/dp/B004F9LVXC?ref=ppx_pop_mob_ap_share https://www.amazon.com/dp/B004F9LVXC?ref=ppx_pop_mob_ap_shar...

mike_hearn 2y ago
That page doesn't make any mention of HDCP stripping, and says it can only work up to 1080p anyway which isn't hardware protected to begin with. Where is the evidence this device strips HDCP?
- ec109685 2y ago
  I can’t remember where it was referenced from, but you can see in the reviews too that it strips HDCP. Good point on it not being 4k though.

kuschku 2y ago

https://aliexpress.com/item/1005003020587234.html https://aliexpress.com/item/1005003020587234.html

mike_hearn 2y ago
That device makes no mention of stripping HDCP and I can't find any evidence it does that on the maker's website. What makes you think it will strip HDCP?
- kuschku 2y ago
  > I can't find any evidence it does that on the maker's website. I believe that's intentional (it would be illegal to import if it was advertised). > What makes you think it will strip HDCP? I've got 6 in use for lecture/talk recording without worrying about HDCP. Especially useful for presenters casting to chromecast or presenters using macbooks with DRM software (as blackmagic SDI converters don't support HDCP at all)
  - mike_hearn 2y ago
    But lectures probably aren't DRM protected? HDCP isn't always on.
    - kuschku 2y ago
      You'd think so, but it's not even close to true. For example Macs and RedHat systems require HDCP if you've used Spotify or Apple Music since the last reboot (which applies to most speakers). Some Chromebooks can't provide direct display out but cast to a ChromeCast instead, which also always requires HDCP. We've also had talks on media and cultural studies which use a clip from e.g. a Netflix or Amazon Prime show as part of their talk. HDCP is almost guaranteed in this case. If your HDMI chain signals that it can't handle HDCP, some computers will obey that (and downgrade or stop playback). But most broadcast HDMI tech can't even signal that HDCP is unavailable, so you'll get HDCP by default. That's why every major venue, university or event has HDCP killers stockpiled. For 1080p60 that used to be cheap chinese HDMI splitters, nowadays it's mostly these Hagibis cards. If they're really fancy they'll have an HD Fury with HDCP removal license, but those cost ~$600.