[vlc] Re: Synchronize Players

[Hornsby Adrian]

Gildas Bazin wrote:

>On Thursday 22 April 2004 11:52, Philippe De Neve wrote:
>  
>
>>Hi guys,
>>
>>I'm working on a project for synchronizing video sources. The intention is
>>to show 2 or more video sources each on a independent PC. On each pc a
>>player (favourably VLC:-) )is installed to playback the video. On each
>>player all frames have to be shown at exact the same time.
>>Does anybody have an idea how I can realize this? (Not by buying an
>>expensive videowall of course)
>>Can I adjust the source code of VLC so it sends  synchronization 
>>    
>>
>information
>  
>
>>to the other players (which are also adpated to sync) so they can adjust 
>>    
>>
>the
>  
>
>>time a frame is shown?
>>
>>    
>>
>
>When playing from a network source, VLC will already synchronise itself to 
>the server's clock (which is sent inside the MPEG TS stream) so all your 
>VLC instances should be more or less synched. I say more or less because 
>there will still be a fixed delay between your VLC's (due to network 
>buffering or other issues). So to have a perfect sync you'll still have to 
>ensure that, on start, the streams are in sync with each other.
>
>Have a look at src/input/input_clock.c, this is where all the clock magic 
>happens.
>
>--
>Gildas
>
>  
>
I am actually working on the same project and I have been investigating 
in this area. I f you want to synchronise 2 or more video sources, you 
should work on the server side - VLS for example - and make the streams 
beeing synchronise at the sending time - for this you will need to 
modify a little bit the source code but  for more details sent an email 
on the VLS mailing list as this one is for VLC.
regards

adrian

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