[vdr] Re: A/V synchronisation

[Wolfgang Fiesel <fie@iis.fhg.de>]

Hello Joachim,

in your case you have only to delay the audio signal to the amp. The 
easiest way to do it without any modification of DVB drivers and VDR is 
to use a digital delay (is part of digital reverb equipment). This 
device (most wrapped in a 19' format) is mainly used by musicans to 
create reverb and delay effects. There are analouge inputs and outputs 
(16-24 bit resolution). Additional you can choose the pur delay 
algorithm and adjust it to 240ms). That's all.
I believe there are several cheap devices available on E-Bay.

Wolfi

joachim.koenig@gmx.net wrote:

>Hi,
>
>I do now use vdr (1.0.4) for some time and have the following problem:
>I use a video beamer as display and an separate amp for the sound. 
>Unfortunately sound and video are always out of sync (the beamer delays the
>picture for 
>app.. 240 ms). I would like to have a function to patch the pts value of the
>sound packets with an offset (configurable). Of course this would work only
>in transfer and playback mode.
>It would be even better if this offset could be set in the firmware, but I
>assume that the 
>current firmware does not support this. Also I assume that there may be
>limitations for the 
>offset as the sound needs to be buffered if it is done in the firmware.
>
>Don't get me wrong, I do not ask for an implementation (I can do that by
>myself), 
>but I would like to discuss the issue a bit before doing so. So is there
>anybody out that may 
>have an opinion an that.
>
>mfg
>Joachim
>
>  
>



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