[vlc-devel] libvlc access to each frame..

[buhochileno at gmail.com]

Hi basos:
basos g wrote:
> 2009/3/4 Rémi Denis-Courmont <remi at remlab.net>:
>   
>> On Wed, 04 Mar 2009 09:00:31 -0300, "buhochileno at gmail.com"
>> <buhochileno at gmail.com> wrote:
>>     
>>> I need to know if there is a way to take the current frame of the current
>>> play
>>>       
>> The vmem video output steal images from the video output pipeline, but you
>> will need to do the unsafe marshaling by hand.
>>
>>     
>>> and even modifie the content of the frame previous to the display
>>> (to see the analisys on the screen..), something like the frame
>>>       
>> pointer?..
>>
>> That is not possible without changes.
>>
>> --
>> Rémi Denis-Courmont
>>
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>>     
>
>
> You could implement a video filter (extfilter) (taking another as a
> guideline (e.g. blur or motion detect) that has a
>   p_sys->pf_frame_callback ( picture_t*) function pointer.
> Also you could init this pointer with a config var (e.g.
> --extfilter-filter-callback=0x43454343 )
>
>   
no idea where to start to look on the vlc code...Do you know if it is 
posible to access to that function pointer from libvlc? (in that way I 
can make a wraper for that  function pointer...)
> And have a Filter function on the extfilter filter like this ( no
> memory management code on this example) :
>
> Filter( p_pic )
> {
>    if ( p_sys->pf_frame_callback )
>         p_out = p_sys->pf_frame_callback( p_pic )
>    else
>         p_out = p_pic  ;
>  return p_pic
> }
>
>
>
> Also with the internal vlc_includes you could apply modification or
> filters to the picture_t struct.
>
>   
the filters need to be compiled wih vlc?

> That's all.
>
> Good hacking...
>
>   
Hope so, thanks!!

Mauricio