[mythtv-users] Comcast Analog/Digital Future
bkamen at benjammin.net
Thu Jan 21 01:12:56 UTC 2010
On 1/20/2010 6:11 PM, Devin Heitmueller wrote:
> Perhaps I am misunderstanding the question, but with most of these
> cards you can collect either the MPEG encoded output *or* the raw YUY
> video (depending on how complete the driver support is). So I'm not
> sure what you mean by "frame-grabber like performance". If the goal
> is low latency, then you can bypass the encoder entirely.
Right -- Although I would think using the encoder maybe sacrifices some quality for low-cpu usage vs.
better quality for a direct non-mpeg hardware encoded stream that's then run through the user's choice of encoder (in software on the CPU).
Did I get that right Brian?
> But to Brian's point, you typically choose the input routing (which
> decides which input gets used). You cannot simultaneously capture on
> both the tuner input and the composite or s-video input.
I know it's a single input at a time -- Tuner|Composite|S-Video.
I was only curious if the Tuner went through the MPEG encoder. But the fact that
all the inputs get routed through the encoder (one at a time) gives the card some additional life-span.
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