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• Vérifier l’existence des éléments de menus et permettre de les supprimer si non existant

  22 août 2011

  Dans le cas où on insère un élément de menu fournit par un plugin tiers (contact, gestion mutu ou autre), si on désactive ce plugin, l’élément à inclure n’est plus présent.

  Il affiche une erreur pour les administrateur sur la page et il est impossible de supprimer cet élément de menu.

  Dans le formulaire de menu, il faudrait tester la présence de cet inclure et dans le cas où il n’existe pas, afficher un élément vide reprenant son nom, indiquant qu’il n’existe pas et surtout permettant de le supprimer.

• Is there any way to get the exact audio .wav from a .mp4 video ? (same length and same duration)

  25 novembre 2022, par yuan gan

  I extracted .wav files from many short mp4 videos. (3-6 seconds) But the extracted xxx.wav can not be aligned with .mp4 videos in Premiere. Some videos are 1 frame, and some 2 frames behind.

  


  I used ffmpeg as the following command line :

  


  ffmpeg -i xxx.mp4 xxx.wav

  


  I tried -async or -vsync, but not worked. Here is an example :
1 frame shift

  


  Here is the source mp4 and the extracted wav :
https://drive.google.com/drive/folders/1BFS0JLCPqA3YDMIahlorXTaRTFTJaPfU?usp=share_link

  


  Do you know what caused the problem ? Is there any way to get the exact audio .wav from a .mp4 video ? (Aligned with frame level) Thank you very much.

  


• Converting png images series to webm with transparent white background from Daz3d

  25 août 2015, par James

  I’m trying to make a webm video with a transparent background from a Daz3D model.
  My process is export png image series with transparent background from Daz3D, use ffmpeg to convert png series to webm video.
  This was working well in Daz3D 4.6.

  But in Daz3D 4.8 the exported background is black instead of white, so when converted to webm is ok on Chrome as has the transparency, but on Firefox is black and has a halo (as Firefox does not support transparency so displays background).

  So I’m looking for a solution with Daz3D, or tools like ImageMagik.
  I almost got it with ImageMagik,

  convert -alpha extract *.png mask.png
  
  mogrify -flatten talk*.png
  
  for /f %x in ('dir /s /b blink*.png') do @composite -compose CopyOpacity mask-0.png %x %x

  But for some reason the final webm has a white background not transparent ...
  Some more info here,

  http://www.daz3d.com/forums/discussion/61237/daz3d-4-8-png-background-is-black

  and here,

  http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=28214

  >
  Doh, okay I figured it out. My images were good, but I somehow have two different versions of ffmpeg on my computer and was using the wrong one that doesn’t seem to support transparency.

  Now it is working.

  My only issue is the last shell line,

  for /f %x in (’dir /s /b blink*.png’) do @composite -compose CopyOpacity mask-0.png %x %x

  This only uses mask-0.png, instead of mask-1 for blink01.png, mask-2 for blink02.png etc.