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• ffmpeg combine multiple commands to crop, clip then convert to gif

  6 mars 2016, par Pranoy C

  I have a mp4 video which I need to perform 3 operations and produce the best/decent quality output.

  1. I need to crop the size of the video frames - 250x250.

  2. I need to clip the video to a certain duration 157 seconds to 167 seconds let’s say.

  I am able to perform about 2 together in a single command using :

  ./ffmpeg -i input.mp4 -ss 157 -t 10 -vf crop=250:250:200:100 -strict -2 clipped.mp4

  3. Next I need to convert this into a gif. I am using the below 2 commands for this :

     ./ffmpeg -y -i clipped.mp4 -vf fps=10,scale=320:-1:flags=lanczos,palettegen palette.png
     
     ./ffmpeg -i clipped.mp4 -i palette.png -filter_complex "fps=10,scale=320:-1:flags=lanczos[x];[x][1:v]paletteuse" output.gif

  My question is-

  Is there any way to combine all 3 above commands into 1 ? I am able to use the double ampersand && to run the commands after each other but is there a better way in a single command ?

  Is there any way to avoid the intermediate temporary files like clipped.mp4 and palette.png ? Something which can pipe the output to next command ?

  Thanks for the responses !

• Generating a waveform using ffmpeg

  2 février 2017, par krisph

  I am trying to generate a waveform image using ffmpeg.

  I have successfully made a waveform image, however it doesn’t look very nice...

  I have been looking around to try and style the image to make it look nicer, however I have been unable to find any information on this or any tutorials on this.

  I am using PHP and shell_exec to create the waveform.

  I am aware that there are php library that can do this but due to file format this is a lengthy process.

  The code I am using is as follows :

  $command = 'convertvid\bin\ffmpeg -i Temp\\'.$file.' -y -lavfi showwavespic=split_channels=0:s='.$width.'x50 Temp\\'.$PNGFileName;
  
  shell_exec($command);

  Basically I would like to add a line through the middle as there are blank spots at the moment and would like to be able to set the background and wave colour.

• Anomalie #3557 (Nouveau) : http://stats.spip.net/ faussées

  27 septembre 2015, par realet RealET

  La chaîne composed-by insérée dans les header HTPP par SPIP est limitée à 934 caractères.
  Résultat : sur des sites avec vraiment beaucoup de plugins, la liste des plugins est tronquée.

  Du coup, les stats d’usage d’un plugin pourront être faussées sur http://stats.spip.net/ et http://plugins.spip.net/

  Un exemple :
  

  SPIP 3.1.0-beta @ www.spip.net + spip(3.1.0-beta),compagnon(1.5.1),dump(1.7.4),images(1.1.10),forum(1.9.29),jqueryui(1.11.4),mediabox(0.10.2),mots(2.7.3),organiseur(0.10.4),petitions(1.5.2),ancresdouces(1.4.6),boutonstexte(2.0.3),calendriermini(2.3.8),citations_bb(0.1.2),corbeille(3.0.6),crayons(1.23.0),facteur(3.1.2),fonctions_images(0.6.11),mailcrypt(2.4.2),memoization(1.5.7),nospam(1.5.13),notifications(3.5.2),orthotypo(1.4.1),palette(3.0.6),spip_bonux(3.2.1),typo_guillemets(1.5.2),yaml(1.5.2),porte_plume(1.15.7),revisions(1.8.4),safehtml(1.4.1),sites(1.9.12),squelettes_par_rubrique(1.1.1),stats(0.6.7),svp(0.86.10),tw(1.3.4),urls(1.5.2),vertebres(1.2.4),iterateurs(0.6.1),queue(0.6.6),breves(1.3.10),compresseur(1.9.9),medias(2.10.24),accessibilite(0.8.8),pp_chgt_lg(0.3.1),fulltext(1.1.5),oembed(1.4.10),typoenluminee(3.5.4),verifier(1.0.8),agenda(3.14.10),saisies(2.5.10),savecfg(3.0.0),uploadhtml5(1.3.1),dictionnaires(
  

  Une idée comme ça : un var_mode=sad qui listerait les plugins installés (en séparant les plugins et plugins-dist)