Want to resurrect your D/D2 MAC kit?

[solly]

it was also d2mac 18 w tdf mcm and german channel rtl d2mac it work pal plus

 

[Captain Jack]

A bit of soft encryption (not requiring a card) implemented for the D2MAC encoder - sent from HackRF to Echostar LT8700.

 

[BSBSquarial]

This is a Great thread!
Did any one manage to successfully transmit video and audio to a DMAC receiver?
I have some BSB receivers that I'd love to be able to transmit to.
I also have a Rohde & Schwarz SGDF D / D2 MAC Video GENERATOR.

Any pointers on how to transmit to one of my BSB receivers using this?

Chris

 

[Captain Jack]

We are using hackrf device with hacktv (Google it) but the MAC part is not yet released. The generator just generates test cards. It doesn't convert PAL to MAC.

 

[fsphil]

It was one of those test card generators that kicked off this project :-)

 

[BSBSquarial]

It was one of those test card generators that kicked off this project :-)

Hi Phil,
so if I wanted to transmit to a BSB box do i just need to buy a HackRF and download the Hacktv software?
How do I go about running the scripts you have online?
Sorry. I'm not very good at the software/programming stuff. Haven't a clue really but I've been dreaming of receiving a signal on one of my BSB boxes for years now.
Regards
Chris

 

[fsphil]

Potentially, but I wouldn't get one just yet. hacktv doesn't have D/D2-MAC support yet, but it's coming soon(ish) in the next few weeks.
Also the BSB receiver requires D-MAC which is a bit trickier for the hackrf to handle due to the higher speed of the digital bits compared with D2-MAC, so it might show only video with poor sync and no audio. I have a BSB box here so I'll give it a test and report back.

 

[BSBSquarial]

Potentially, but I wouldn't get one just yet. hacktv doesn't have D/D2-MAC support yet, but it's coming soon(ish) in the next few weeks.
Also the BSB receiver requires D-MAC which is a bit trickier for the hackrf to handle due to the higher speed of the digital bits compared with D2-MAC, so it might show only video with poor sync and no audio. I have a BSB box here so I'll give it a test and report back.

Great thanks.

 

[BSBSquarial]

Hi Phil,

any luck with testing the BSB box with the DMAC transmission?
Chris

 

[fsphil]

Ah good timing, I just got the MAC gear out last night again. I have a Philips BSB STU902 set up at the moment, and it's not working too well:



The decoder doesn't seem to be handling the digital data well at all, so it's not staying synced and there's no audio. The colour is also wrong, which I can't explain at the moment. It did seem to decode some digital data though as the 16:9 > 4:3 crop is enabled, which is a setting in the line 625 data.

I'm going to be trying a few new ideas on how to generate the signal, but it might not help.

 

[BSBSquarial]

Ah good timing, I just got the MAC gear out last night again. I have a Philips BSB STU902 set up at the moment, and it's not working too well:

View attachment 123968

The decoder doesn't seem to be handling the digital data well at all, so it's not staying synced and there's no audio. The colour is also wrong, which I can't explain at the moment. It did seem to decode some digital data though as the 16:9 > 4:3 crop is enabled, which is a setting in the line 625 data.

I'm going to be trying a few new ideas on how to generate the signal, but it might not help.

WOW a new image on a BSB receiver.
I am impressed. I'd love to be able to get this working on my BSB receivers.
Let us know if you have any more luck.
Thanks
Chris

 

[zermok]

Captain Jack
sorry for my newbie question, I'm looking for an audio video obfuscation encoder/decoder with if possible a key, something like this

how this line
/* Calculate the active line number */
vy = (s->line < 313 ? (s->line - 23) * 2 : (s->line - 336) * 2 + 1);
+ if (s->frame%400 > 100 && s->frame%400 < 200) vy = (vy > 0 ? rand() % 200 + vy : vy);
if(vy < 0 || vy >= s->conf.active_lines) vy = -1;

can be used in case of an ffmpeg command line in real time?
- could it be decrypted on the fly too?

 

[Captain Jack]

Not really sure what you're asking.... Ffmpeg has nothing to do with scrambling.

Take a look at cryptimage, software scrambler and descrambler which simulates discret11, nagravision syster and videocrypt - probably the closest to what you want.

 

[zermok]

I talked about ffmpeg because it's widely used converter and unfortunately there is no such kind of option to create discret11/nagravision encryption.
To be more explicit:, I'm developing a browser extension that intercepts an audio/video stream and apply an encryption/decryption (with a key if possible) like nagravision or discret11. Do you think there is a way to do it?

 

[Captain Jack]

Not unless you write your own ffmpeg filter (or some other method). This is not what HackTV was designed for...

 

[zermok]

arggh, ok

 

[BSBSquarial]

Ah good timing, I just got the MAC gear out last night again. I have a Philips BSB STU902 set up at the moment, and it's not working too well:

View attachment 123968

The decoder doesn't seem to be handling the digital data well at all, so it's not staying synced and there's no audio. The colour is also wrong, which I can't explain at the moment. It did seem to decode some digital data though as the 16:9 > 4:3 crop is enabled, which is a setting in the line 625 data.

I'm going to be trying a few new ideas on how to generate the signal, but it might not help.

Hi Phil,
Have you have any more thoughts on how to get the DMAC working?
Chris

 

[Channel Hopper]

From the IBA archives.

 

[Captain Jack]

Does anyone remember whether BSB used Eurocypher and what it looked like? I assume it was very similar to Eurocrypt given how easy it was to convert those boxes to D2MAC...

 

[BSBSquarial]

Does anyone remember whether BSB used Eurocypher and what it looked like? I assume it was very similar to Eurocrypt given how easy it was to convert those boxes to D2MAC...

BSB did use Eurocypher which I believe was a variant of Videocipher II.
It was a joint venture between BSB and General instrument.