[vlc-devel] Re: firewire output

Vaclav Koldus vaclav.koldus at avpark.cz
Tue Aug 9 08:43:19 CEST 2005

On Fri, 5 Aug 2005 09:46:42 +0200, Benjamin Pracht  
<bigben+spam at videolan.org> wrote:

> On Mon, Aug 01, 2005, vaclav.koldus at avpark.cz wrote :
>> I've got some further questions about access_out modules.
>> Sounds as good idea to use it for fw output, but:
>> 1) How to use it? How can I make vlc use it? And how to do it to use
>> classic  video output and acces_out module additionaly? Please help.
> I suggest you to have a look ath the streaming howto , on
> http://videolan.org/doc
>> 2) If I'm right, acces_out module is the same way how streaming is done.
>> But  from my earlier attempts I suppose, that the stream output doesn't  
>> go
>> through video filter. I need to render some graphics (logo & more) and
>> then pass it out.
> Since 0.8.0, you can render filters on videos while streaming.

Oh yes! Thanks for kicking me in the right direction! This sounds nice. I  
only 2 questions.

1) This is streaming procedure, that means that encoded video is streamed  
   acces module in the fastest possible speed. But I need to have frame  
   just like when playing file localy. Is it possible to set this up  
somehow or
   have I to write the waiting for the right moment to send it into access  

2) Well, I can write codec module for DV, and acces module for Firewire,  
but what
   about muxing? DV codec works differently. It encodes both video and  
audio at
   the same time into one DV stream. Post multiplexing into a container is  
   but this stream (AVIDV Type 2) is useless when I want to send it into  
   I need to encode only video and then send it to access module (and  
firewire) as
   is without muxing. I've tried the "raw" multiplexer, but it seems to me  
that it
   isn't just "raw".  Seems that it has it's header (always same) and maybe  
   streams (a/v) are there. Is writing own mux module (that will throw  
audio away
   and send really RAW stream) and plaing soud localy the only way how to  

Thanx a lot for your help.

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