[vdr] Re: AC3 over DVB-s is possible - Part2

["Uwe Scheffler" <linux_dvb@uni.de>]

Hello Wolgang and List,

Wolfgang Fiesel wrote:
> Hello,
> 
> as I promised last week,
> now AC-3 over Digital Output (SPDIF) for DVB-S is reality (recordings
> and DVD playback).
> Of course if the recordings doesn't include any AC-3 data the SDPIF
> output will be operate like before (raw PCM).
> I'm using DVB-S version 2.1 (Hauppage)
> 

Very very good!! This is great work!! Thanks.

I have a SiemensDVB-C and AC-3 over Digital Output (SPDIF) for DVB-C
work very good! Better than about Soundcard.  :-)

Soundblaster Live 1024 > /dev/null  ;-))


Mfg Uwe


> It's time to throw away the soundcard and forget the -a switch.
> Nevertheless I modified the code very carefully and minimized the
> patch effort. Therefore all previous AC-3 playmodes (-a switch) should
> also operate like before.
> 
> How does it work ?
> The secret is the IEC 61937 paper which describes the wrapping of AC-3,
> MP3, DTS, ... into raw 16 bit PCM data. Finally the LPCM
> transport feature of the DVB driver was the key to realise it.
> 
> The patch is related to Klaus latest update version (vdr-0.99) to get a
> chance
> to be integrated if the test phase should be successfully. Since two
> days I've check it by myself with different AC3 recordings and DVD's. Up
> 
> to now all start/stop actions seems to be right, no AC-3 dropouts seems
> to be happened. Please test it also very stressfully.
> 
> Enabling the feature:
> 
> Please compile VDR with the switch AC3=1 (in addition with your
> favourite switches), that's all. Afterwards all AC-3 information will be
> 
> transported over the digital output. (make clean!!)
> On the other side VDR is operating as usual (only PCM over digital
> output) if you don't use this switch. No modification of internal stream
> handling.
> 
> You have to change the following files:
> 
> 1. ./VDR/dvbapi.c -> dvbapi.diff
> 2. ./VDR/Makefile -> Makefile1.diff
> 3. ./VDR/ac3dec/decode.c -> decode.diff
> 4. ./VDR/ac3dec/Makefile -> Makefile2.diff
> 
> (call "patch -p1 original diff-file")
> 
> Here is the patch file:
> http://www.fiesel.de/download/ac3patch.tar.gz
> 
> Enjoy the liberty of digital music
> 
> Wolfi
> 
> 
> 
> 
>