pjp wrote:
In article , lid says...
J. P. Gilliver (John) wrote:

I once bought an HDMI to VGA cable - being puzzled even at the time, as
AIUI one is digital and the other analogue! It didn't work, of course. I
haven't thrown it out!
Well, this could be interesting.

Did you pay $100 (active) or $10 (surely not passive) ?

Those would be old pricing.

The active ones have dropped considerably in price.

https://www.amazon.com/Moread-Gold-P.../dp/B00SW9JI9A

They can run off the +5V pin on the HDMI connector.
I don't know what the current flow limit is on that
pin, as it's probably intended for powering the
SDA/SCL/CEC plane.

http://unitedtechnologies.com.pk/Nti/image/10ci.png

Since the output is unprotected, the dongle is not
allowed to "support" HDCP. If the OS has an issue with
lack of proper HDCP support at 1920x1080 or higher,
it has the option of "making the image fuzzy" during
Hollywood movie playback. (The player program likely
requests protection.)

This is also why HDMI capture cards aren't supposed
to support HDCP, and the front end chip is not
supposed to have HDCP keys installed in it to make
encrypted content capture possible.

Paul

I have no way of testing given I don't subscribe to anything
"protected" but it does have me wondering what my Hauppage USB tuner
would think of an encrypted signal and as well what my stand alone ATSC
tuner with a USB PVR interface would also.

My old composite hardware DVD recorder basically will record anything I
can get on the old analog style tv but of course quality is about par
with a very good VCR.

Encryption in Flight Do Not Copy Bit
CableTV Yes (CableCard) Yes should be encrypted on disk
OTA DTV No Yes .wtv encrypted on disk
No No .wtv plays in FFMPEG

My tuner is the third row in the table.
The TV stations I've tried don't seem to cause encryption on disk.

I can play the output of my Hauppauge tuner (from Media Center), with this.

ffplay -ast 2 -vst 3 -x 704 -y 480 some.wtv

Amongst other ways.

And I don't think I've seen my Zinwell DTV STB messing with the
sync pulse on the Composite analog output connector. That enters my
capture card OK (for playback realtime in DScaler).

*******

Analog TV is a thing of the past now, in a lot of places.

It might have had a Do Not Copy bit, but I'd have to look
that up somewhere.

The signal itself doesn't have protection.

It's possible the analog signal on CableTV had some kind
of protection (because of the "swimming" video fields).

For stuff involving DVD playback to Composite or maybe
recording with a VCR, there was Macrovision to mess up the
sync pulses.

Again, beginning to fade from memory. The
Macrovision company lives on, to create more mischief,
so they're not dead yet by any stretch of the
imagination. DMCA made them the gift that keeps on
giving (their techniques now enshrined in law).

https://www-cs-faculty.stanford.edu/...crovision.html

https://arstechnica.com/information-...load-near-you/

Paul