Sur d’autres sites (9963)

• Evolution #4539 (Nouveau) : Suppression des versions dans des procures de spip

  15 août 2020, par Franck D

  Hello
  Avant de faire, je voulais un avis :)

  Je me demande s’il ne faudrait pas que nous supprimions les versions des procures qu’il y a dans :
  https://git.spip.net/spip/spip/src/branch/master/ecrire/paquet.xml#L141
  https://git.spip.net/spip/spip/src/branch/master/ecrire/paquet.xml#L142

  Il y a les plugins (uniquement pour spip 2.1) https://plugins.spip.net/iterateurs.html et https://plugins.spip.net/queue.html

  J’hésite entre la suppression des lignes ou uniquement les versions

  Sachant que de toute façon, la version de itérateurs ne correspond plus avec la version de spip 2.1 depuis au moins les derniers commit de marcimat
  https://git.spip.net/spip/spip/commit/c69869b7b5604c736423c4eec4b92a3f3b7935dd
  https://git.spip.net/spip/spip/commit/afe3a6302795efc996d9d7e679965a201ddd2f22
  https://git.spip.net/spip/spip/commit/4d844b1f05c7ab9cde72f5550b09f0205d650fe7

  L’intérêt était surtout du temps ou les plugins n’avaient qu’un fichier plugin.xml pour spip 2 et 3, mais maintenant :
  - Ils sont rare, et de toute façon, pour spip 3.3 faudra obligatoirement un fichier paquet.xml en plus.
  - Il y a encore des plugins pour spip 3.2 avec un fichiers plugin.xml et un autre paquet.xml, mais je ne pense pas ( a vérifier) qu’il y a des plug qui ont "necessite" ou "utilise" iterateur ou queue

• swscale/graph : add new high-level scaler dispatch mechanism

  10 octobre 2024, par Niklas Haas

  swscale/graph : add new high-level scaler dispatch mechanism
  This interface has been designed from the ground up to serve as a new
  
  framework for dispatching various scaling operations at a high level. This
  
  will eventually replace the old ad-hoc system of using cascaded contexts,
  
  as well as allowing us to plug in more dynamic scaling passes requiring
  
  intermediate steps, such as colorspace conversions, etc.
  The starter implementation merely piggybacks off the existing sws_init() and
  
  sws_scale(), functions, though it does bring the immediate improvement of
  
  splitting up cascaded functions and pre/post conversion functions into
  
  separate filter passes, which allows them to e.g. be executed in parallel
  
  even when the main scaler is required to be single threaded. Additionally,
  
  a dedicated (multi-threaded) noop memcpy pass substantially improves
  
  throughput of that fast path.
  Follow-up commits will eventually expand this to move all of the scaling
  
  decision logic into the graph init function, and also eliminate some of the
  
  current special cases.
  Sponsored-by : Sovereign Tech Fund
  
  Signed-off-by : Niklas Haas <git@haasn.dev>
  

  • [DH] libswscale/Makefile
  • [DH] libswscale/graph.c
  • [DH] libswscale/graph.h

• FFMPEG, Blur an area of a video using Image Select Areas Plugin

  12 juillet 2016, par Drupalist

  I am building an online video editor. I need to allow the users to blur an area of movies. This must be done graphically, I mean user should be able to select an area of a video, using an screenshot, then the selected area must be blurred. Some thing like this

  

  Is there anyway to map this selected area dimension and its distance from borders to the real values that must be applied to the video ?

  I mean four numbers, width, length, top, left will be provided using this plug in and I need to use these numbers to blur an area of videos.

  I take an screenshot of video. In order to keep the aspect ratio, I will fix the width to 800px and let the height to be scaled up/down. It is clear that the width, length, top, left of the selected area of the screenshot is a factor of the width, length, top, left of the area that must be blurred in video. but I don’t know how to get this factor. Besides that I don’t know how to get the video resolution.

  Thanks in advance.

  ---

  Update

  This is my PHP code that gets the selected area dimensions and offsets

  $iLeft = $_POST['left'];
  
  $iTop = $_POST['top'];
  
  $iWidth = $_POST['width'];
  
  $iHeight = $_POST['height'];
  
  exec('ffmpeg -i '.$url.' -filter_complex "[0:v]scale=iw*sar:ih,setsar=1,split[bg][bb];[bb]crop='.$iWidth.'*iw/800:iw*'.$iHeight.'/800:'.$iWidth.'*iw/800:'.$iHeight.'*iw/800,boxblur=10[b0];[bg][b0]overlay='.$iLeft.'*W/800:'.$iTop.'*W/800"" '.$name.' > block.txt 2>&1');

  $iLeft, $iTop, $iWidth, $iHeight are the left, top, width and height of the selected area via the image plugin.

  It blurs many selected areas very well, but areas like this

  

  The Image Left, Top, Width, Height is 257,  39.26666259765625,  10,  391

  don’t get blurred. Also a video with Dimension 207x207 didn’t get blurred as well.