Christoph Schulz writes: > Hello, > > please forgive me if this is the wrong mailing list to ask this question. > > The problem: I made a TS recording with a Technotrend DVB-C card > (dvb-ttpci driver, AV7110 based) from a scrambled channel. > Unfortunately, the CAM was not properly initialized, so the recording > wasn't decrypted but saved scrambled on the disk. Now my question(s): > > 1) Is it technically possible to replay the recorded TS stream through > the DVB card, using the CAM to decrypt it? I read somewhere that you can No. > feed an MPEG2 stream through the dvr device into the driver, but that > then the software decoder is used. Does this mean that the hardware CAM No, but it is not passed through the CI interface. > cannot be used in such a case? Yes, it cannot. > > 2) Does the scrambled MPEG2 transport stream contain enough information > to allow a later descrambling to be performed successfully? I read > somewhere that a similar card does not record all the ECM/EMM > information needed for later decrypting. Is this true for my card? You could record it with your card but you probably did not. > 3) If the stream does contain the required information but the hardware > is not capable of descrambling a recording, is it possible to use a > software-based approach? I mean, is it possible to use/write a program > that communicates with the hardware CAM directly to decrypt the > recording stream? Not without extra hardware. E.g. a normal PCMCIA interface would not work and I am not aware of any that would do that. > 4) If one cannot use the hardware CAM, is it possible to use a > software-emulated CAM? (I read about it in some Windows forums.) Does an > emulated CAM exist for Linux? And if so, does anyone know if it is legal > to use it with your own recordings provided you have a legal > subscription? (Of course I have a subscription!) IANAL and I am certain there is some obscure interpretation of some law which will say either way ... Ralph
