[vdr] Re: AC3 audio handling

[s.huelswitt@gmx.de (Stefan Huelswitt)]

On 03 May 2004 Marko Myllymaa <myllymaa@niksula.hut.fi> wrote:

>> > Is there any possibility to have an "on the fly" conversion (downmix) for the
>> > AC3 audio to mpeg audio ?
>>
>> Certainly. You can find code for this inside the DVD plugin. It
>> does downmixing if used without AC3overDVB.
> 
> I have little question about AC3overDVB vs. downmixing in dvd plugin.
> Which eats more cpu? I've been so far using dvd plugin and had it downmix
> the ac3 sounds. It's working nicely, but I would still like more ac3
> sounds. But I'm not sure if my machine is enough for that.. P200MMX, with
> 64 megs of ram..

Downmixing of course needs more cpu power. But if downmixing with
DVD plugin worked on your machine, your cpu seems to be fast
enough for this.

Using downmix for recording with AC3 stream seems quite useless
to me. I haven't seen a broadcast company which doesn't provides
a dolby-surround downmix in parallel to the AC3 stream.

> Oh, one other question about dvd plugin. Why does it use hd so much? The
> hd led flashes all the time and dvd led only occationally. Afair xine did
> not use that much hd..

AFAIK it doesn't uses the HD at all, but may be you're running
low on memory and the system start to swap out.

-- 
Stefan Huelswitt
s.huelswitt@gmx.de  | http://www.muempf.de/


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