Recherche avancée

Sur d’autres sites (9582)

• Evolution #4256 (Nouveau) : Faire un signalement des mise à jour de sécu

  24 décembre 2018, par Franck D

  Hello :-)
  Quand un plug reçoit une mise à jour de sécu, l’utilisateur ne le sait pas, car, il n’y a pas de différence "d’affichage" entre une mise à jour de secu et une mise à jour "classique" !
  Résultat, les gens ne font pas forcément la mise à jour, car, il n’y a rien de "percutant" comme info !
  Cela va un peu avec https://core.spip.net/issues/3509 et https://core.spip.net/issues/3017, mais pas complètement non plus, car il ne faudrait même pas y avoir de besoin de lire les logs pour savoir qu’il y a une correction de secu.

  Il faudrait que quand SVP détecte une mise à jour de secu, l’arrière-plan du plug en question sur cette page /ecrire/ ?exec=admin_plugin devienne "rouge" par exemple, voir que le webmestre et les admi reçoivent l’info d’une façon ou d’une autre sans devoir aller sur cette page (mail, popup à la page d’accueil, autre ???)

  Je me demande s’il ne nous manque pas un fichier du type archivelist_secu.txt sur la zone ou SVP regarderait les plugins qui sont dedans avec leur version, nous aurions un affichage du type :
  Nom_du_prefix_du_plugin/Version_du_X_qui_contient_le_problème/Version_du_plugin_sans_problème

  Ce qui donnerait par exemple :
  saisie / version 1.x.x / 1.42.11
  saisie / version 2.x.x / 2.28.0
  saisie / version 3.x.x / 3.11.1
  Franck

• Use ffmpeg to compile RGBA image sequence into two separate videos (RGB + Alpha)

  27 novembre 2018, par MirceaKitsune

  I plan on using Blender to render animated sequences for a game. I need the videos to have transparent backgrounds in the format expected by its engine. This format involves the transparency being defined as a separate grayscale video of equal FPS and duration. Since splitting the RGB and Alpha channels in Blender is more complicated, I’d prefer doing this directly from ffmpeg.

  The input directory contains an image sequence of png files in RGBA format (eg : 0000.png to 0100.png). What I need ffmpeg to do is compile them into two separate videos : One containing only the RGB channels (leave transparency black) and another containing only the grayscale alpha channel. In the end I’d have something like my_video.mp4 + my_video_mask.mp4.

  I’m familiar with compiling non-transparent image sequences into video using :

  ffmpeg -f image2 -i /path/to/sequence/%04d.png output.mp4

  But I don’t know how to extract the alpha channel and make it a separate video file. What is the simplest ffmpeg command to achieve this result ?

• Windows ffmpeg batch to find folder containing VOBs, concatenate and convert, move to next folder [on hold]

  27 novembre 2018, par Daniel Cooper

  All,

  I am in need of help that is beyond my capabilities. I need to run a batch command in Windows that finds VOB files in a folder, concatenates and converts them using ffmpeg, and then continues the recursive search for more folders containing VOBs.

  The idea is that the cmd file would be copied into the root that the command should look under when running. I have found commands that find VOBs and I have found ffmpeg scripts that concatenate and convert, but combining these functionalities together in the way I need is proving above my level.

  Thank you all in advance.

  EDIT :
  The computer I am running this code on is off the network so I had to manually retype. Any typo’s here are therefore likely from the retyping since the codes seem to function as intended originally...

  This code creates a list of folders that contain VTS*.VOB (as opposed to just all *.VOBs because that would include a certain useless VOB that is present in each folder).

  for /r %%a in (.) do @if exist "%%~fa\VTS*.VOB" echo %%~fa >> folderlist.txt

  This piece combines VTS*.VOBs and then converts them to MP4

  @ECHO OFF
  
  md ffmpeg_output
  
  for %%f in (VTS*.VOB) do echo file '%%f' >> filelist.txt
  
  ffmpeg -f concat -i filelist.txt -c copy "ffmpeg_output\Total.VOB"
  
  ffmpeg -i "ffmpeg_output\Total.VOB" -c:v libx264 -pix_fmt yuv420p -c:a copy "ffmpeg_output\Converted.mp4"

  I attempted to essentially nest the for loops with the idea that the first snippet above would produce a txt file, which I could then "for /f" through each line to direct the second snippet of code for concatenation and conversion of the VOB files. However this plan never got off the ground as I am unable to figure out the viability or syntax of nesting for loops in this way.