[vlc-devel] Re: firewire output & fb output

[Benjamin Pracht]

On Thu, Jul 28, 2005, Vaclav Koldus wrote :
> Hi people!
> 
> I'm new here so sorry I know nothing 'bout team working on such a huge  
> project.
> 
> I'm working on firewire output filter for VLC, cause we need it in our  
> firm (I send it into D/A convertor and then into TV or Broadcasting device  
> but it's not important.)
> 
> I could post it or add it into VLC or something if I knew how to do it and  
> if I knew how to make a new filter from scratch. At this time the plugin  
> is working well, but I made it as a part of logo filter ( because I wanted  
> to be able to see the video on the monitor besides the firewire output )  
> but I would want to write standalone firewire filter so I can us it just  
> this way:
> 
> Video -> Logo Filter -> text rendering filter -> Firewire filter -> output
> 
> pls can you lead me how to do it??

Well, I guess a stream output access_out module would be the most
consistent way to do that (have a look the display access output, in
modules/access_out to see how to build an access out and get the decoded
streams)

> 
> BTW: the text rendering filter is another thing I'm working on. It renders  
> aligned word wrapped text and color blended boxes on the output natively  
> in YUV so I don't have to convert screen to rgb and then back in the  
> filter. This I want to have also as standalone filter. So pls help howto  
> start filter from scratch ?
> 
> 
> 
> My second question is about framebuffer output filter.
> 
> I suppose this filter has been untouched for a long time :)
> There is a bug in my version (some release of 0.8.2)
> I don't know who thought that something like this can work:
> 
> v_out->something->i_tty=0;
> .
> .
> .
> ioctl(v_out->something->i_tty,...,..)
> 
> 
> but it don't work for me.
> 
> What we need is naturaly
> 
> v_out->something->i_tty = open("/dev/tty0",..);
> 
> and this works. At least somehow.
> 
> Problem is that the fb output is awfully slow! Why the hell? I want to use  
> it
> but with this framerate I simply can't!
> 

Well, some frame buffer device drivers (such as the vesa one) are actually
awfully slow... Which one are you using ? Do you get the same issue with
other applications ?

-- 
BigBen

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