[mythtv-users] AC3 recording for digital cable boxes.

[Michael T. Dean]

Steve Adeff wrote:

>On Wednesday 02 November 2005 23:57, Robert Macaulay wrote:
>  
>
>>I have a PVR 150 and a PVR 500 on my myth box. I have my digital cable
>>plugged into one of these via svideo and RCA audio.
>>
>>My cable box has a digital output on it--coax, and my mythbox has 2 digital
>>ports. -- one optical and one digital. Its a nforce3 MB, w/ an onboard snd
>>card using driver snd_intel8x0 identified as a CK8S. What makes me hopeful
>>on this is the following
>>
>>mythbackend pcm0c # cat /proc/asound/pcm
>>00-00: Intel ICH : NVidia CK8S : playback 1 : capture 1
>>00-01: Intel ICH - MIC ADC : NVidia CK8S - MIC ADC : capture 1
>>00-02: Intel ICH - IEC958 : NVidia CK8S - IEC958 : playback 1
>>mythbackend pcm0c # cat /proc/asound/devices
>>18: [0- 2]: digital audio playback
>>25: [0- 1]: digital audio capture
>>16: [0- 0]: digital audio playback
>>24: [0- 0]: digital audio capture
>>0: [0- 0]: ctl
>>
>>I see digital playbacks and capture devices
>>
>>What I'd like to do if hookup the optical out to my receiver which I know
>>is possible.. but having AC3 output is not very useful if you dont have AC3
>>recorded in the first place. Can I use the COAX port on the snd card as a
>>recording device while using the optical as an output? And if so, how do I
>>convince myth to record the video via the hauppauge, and merge in the sound
>>from the sound card?
>>
>>Oh, the is from cable in the US, not HDTV, plain old digital cable.
>>
>>I've searched and searched, but what Ive found are lucky people w/ HDTV
>>cable boxed recording via firewire.
>>    
>>
>I'm interested in this as well since the movie channels output 5.1 for lots of 
>shows and being able to capture this stream would be great.
>Has anyone used digital in on their soundcard to capture an AC3 stream with 
>their video? Does it sync correctly?
>  
>
It won't work with the PVR-x50's because they don't have digital audio 
inputs and /they/ create the MPEG stream (complete with audio).

Mike