bunnie wrote:The answer is a little bit complicated.
Basically, NeTV is not an HDCP stripper. So, if the Xperia Pro would not work with a non-HDCP HDMI device (without the NeTV in the chain), adding an NeTV to the chain won't 'fix' that because NeTV won't strip the HDCP for you and output plain HDMI.
However, if connecting your Xperia Pro directly to your non-HDCP HDMI device shows your content without the NeTV in the chain, it means that the Xperia Pro has a fall-back mode where it can still render content unencrypted.
In that case, NeTV would still work with that chain, as it's fine to work with both HDCP and non-HDCP feeds.
Overlays only work on encrypted streams if and only if the
display device also supports encrypted streams.
This is because NeTV never decrypts video. It has no keys internally
that are capable of decrypting anything.
Instead, it simply encrypts the data in the overlay buffer to the
same key that the display device would be decrypting, and replaces the
pixels that correspond to the overlay with the newly encrypted pixels.
For detailed tech details, see
http://events.ccc.de/congress/2011/Fahr ... 86.en.html , or
watch the video at http://www.youtube.com/watch?v=4TuwozBu1QQ
Thus, if your display or receiving device cannot handle HDCP encrypted
streams, it will not be able to understand NeTV's overlay either, as the
overlay is identically encrypted to the source stream. This is why NeTV
is not a 'stripper' -- it never decrypts video, it simply encrypts the
new data to the same keystream as the original video.
If you are trying to use a Black Magic recorder as your sink, and you're
just getting snow out of the device, NeTV won't help you. Your sink must
be a 100% HDCP-compliant device with proper decryption keys for NeTV to
work with encrypted streams.
Hope that helps.
Video overlay on HDCP encrypted feeds
Users browsing this forum: No registered users and 2 guests