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• Révision 17465 : Debug de la procédure d’upgrade :

  22 mars 2011, par cedric -

  securiser les parametres meta et table venant de l’url, puisqu’ils sont utilises pour faire des requetes sql par la suite ...

  sur reprise, ne pas se melanger les pinceaux entre la version installee de spip et la meta donnee par l’url

  les operations sql_xx de maj sont a peu près atomiques, on (...)

• ffmpeg : drawtext fade in/out with zmq

  11 novembre 2019, par jb_alvarado

  There are several ways to fade in and out text in ffmpeg. But I only found solutions where the actual time is known.

  But what can I do, when I don’t know the current running time and I would like to fade in and out a text ?

  Let’s say I have an endless stream and I want to fade in a text with zmqsend. And the fade should start immediately. For that my understanding is, that I need to store some time information in a variable and calculate with that. But storing variables is not possible in ffmpeg expressions - right ?

  For testing purposes here are a playing instance :

  ffplay -dumpgraph 1 -f lavfi "color=s=512x288:c=black,zmq,drawtext=text=''"

  For adding some text with zmq I can run now :

  echo Parsed_drawtext_2 reinit text="Hello\ World,\ what’s\ up?" | zmqsend

  Or if I know the running time and after 10 seconds I want the text fade in :

  "text='Hello\ World':fontsize=:fontcolor=ffffff:alpha='if(lt(t,10),0,if(lt(t,11),(t-10)/1,if(lt(t,16),1,if(lt(t,17),(1-(t-16))/1,0))))'"

  My goal is now to have an expression what I can send, so that ffmpeg starts fading in the text and out after a certain time.

  Something like :

  now=t,if(lt(t,now+10),0,if(lt(t,now+11),(t-(now+10))/1,if(lt(t,now+16),1,if(lt(t,now+17),(1-(t-(now+16)))/1,0))))

  Is there a way to store variables in expression, or is there any other way to realize this ?

• A "region code" restriction for a custom created video dvd file [closed]

  17 décembre 2012, par user931392

  I want to create a video dvd ( no menus, just "plug and play" ) from a few video files. I`m doing it like this :

  ffmpeg -i sample-media/hellboy-2.wmv -y -target ntsc-dvd sample-media-to-mpeg/hellboy-2.vob
  
  
  
  dvdauthor -o sample-dvd -x dvdauthor-settings.xml
  
  
  
  mkisofs -dvd-video -o hellboy-2-trailers.iso sample-dvd/

  where "dvdauthor-settings.xml" is : link.

  But when I try to play the iso file in windows it says :

  Windows Media Player cannot play the DVD because the disc prohibits playback in your region of the world. You must obtain a disc that is intended for your geographic region.

  When I open the *.IFO file with IfoEdit it says that all world regions are unabled.

  Can someone tell me why is this happening ? ( maybe the whole process of creating the *.iso file is wrong ? )