[streaming] Re: Audio problem with multilingual DVB-S provider

[Thomas Kernen]

The Swiss national broadcaster does the same on their DVB-S and DVB-T 
feeds in order to "emulate" the A2/Zweiton method that is used for 
analogue sources. So you would have stereo for the 1st audio (localised 
audio) and dual mono for the 2nd audio (localised/original audio) . 
Fortunately they have announced that they will migrate to the full 
multi-lingual method in September 2006.

Thomas

Paul Rae wrote:
> This is called dual mono, very poor way of doing things imho but i do see it from time to time.
> 
> Basically, rather that sending the streams on different pids, they use mono mix. Whereby one mono stream is sent to the left channel and the other mono stream is sent to the right channel.
> 
> I'm not sure if VLC has the option to support dual mono?
> 
> -----Original Message-----
> From: streaming-bounce at videolan.org
> [mailto:streaming-bounce at videolan.org]On Behalf Of Matthew Geier
> Sent: 08 February 2006 04:02
> To: streaming at videolan.org
> Cc: vlc at videolan.org
> Subject: [streaming] Audio problem with multilingual DVB-S provider
> 
> 
> 
>   I'm streaming the output of several DVB cards onto our LAN. I've 
> pretty well worked out how and have a box with 4 cards sending 15 
> video/radio streams out.
> (vlc 0.8.4a, Fedora Core 4, vlc compiled from source)
> 
>   However one of our local DVB-S providers (Palapa C2, Satelindo) is 
> sending some channels with two different audio channels (TV5 for example 
> appears to have the orginal French on one channel, and Indonesian on the 
> other).
>   VLC seems to be treating this as stereo and mixing the two, and 
> getting confused, I get two audio channels showing in the audio dialog, 
> but one in quiet and the other has both audo channels overlayed on one 
> another. I suspect it thinks the transmission is in stereo, when what 
> the provider is doing is sending two mono audio tracks.
> 
>   Interestingly my dreambox STB did the same thing, I had to bring the 
> Audio menu and say I wanted left channel audio only to get just the French.
> 
>   I suspect the provider is doing something stupid, but, how to I work 
> around it ?.
> 

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