Recherche avancée

Sur d’autres sites (7447)

• Fast seeking ffmpeg multiple times for screenshots

  7 mars 2017, par user3786834

  I have come across http://askubuntu.com/questions/377579/ffmpeg-output-screenshot-gallery/377630#377630, it’s perfect. That has done exactly what I wanted.

  However, I’m using remote URLs to generate the screenshot timeline. I do know it’s possible to fast seek with remote files using https://trac.ffmpeg.org/wiki/Seeking%20with%20FFmpeg (using -ss before the -i) but this only runs the once.

  I’m looking for a way to use the

  ./ffmpeg -i input -vf "select=gt(scene\,0.4),scale=160:-1,tile,scale=600:-1" \
  
  -frames:v 1 -qscale:v 3 preview.jpg

  command but using the fast seek method as it’s currently very slow when used with a remote file. I use PHP but I am aware that a C method exists by using av_seek_frame, I barely know C so I’m unable to implement this into a PHP script I’m writing. So hopefully, it is possible to do this directly with ffmpeg in the PHP system() function.

  Currently, I run seperate ffmpeg commands (with the -ss method) and then combine the screenshots together in PHP. However, with this method it will be refetching the metadata each time and a more optimized method would be to have it all happen in the same command line because I want to reduce the amount of requests made to the remote url so I can run more scripts in sequence with each other.

  Thank you for your help.

• Fast seeking ffmpeg multiple times for screenshots

  14 septembre 2021, par user3786834

  I have come across https://askubuntu.com/questions/377579/ffmpeg-output-screenshot-gallery/377630#377630, it's perfect. That has done exactly what I wanted.

  



  However, I'm using remote URLs to generate the screenshot timeline. I do know it's possible to fast seek with remote files using https://trac.ffmpeg.org/wiki/Seeking%20with%20FFmpeg (using -ss before the -i) but this only runs the once.

  



  I'm looking for a way to use the

  



  ./ffmpeg -i input -vf "select=gt(scene\,0.4),scale=160:-1,tile,scale=600:-1" \
-frames:v 1 -qscale:v 3 preview.jpg


  



  command but using the fast seek method as it's currently very slow when used with a remote file. I use PHP but I am aware that a C method exists by using av_seek_frame, I barely know C so I'm unable to implement this into a PHP script I'm writing. So hopefully, it is possible to do this directly with ffmpeg in the PHP system() function.

  



  Currently, I run seperate ffmpeg commands (with the -ss method) and then combine the screenshots together in PHP. However, with this method it will be refetching the metadata each time and a more optimized method would be to have it all happen in the same command line because I want to reduce the amount of requests made to the remote url so I can run more scripts in sequence with each other.

  



  Thank you for your help.

  


• Anomalie #4119 : Page gestion des plugins : Selecteur d’action mal positionné quand on met à jour ...

  28 mars 2018, par Peet du

  Proposition, sélectionner par défaut "Mettre à jour" dans le select à partir du moment ou un mise à jour est dispo.

  j’aime bien la lecture de cet article : https://uxplanet.org/ux-design-drop-downs-in-forms-c6943ec30037

  En gros

  • You should avoid having a default unless you believe a large portion of your user’s (maybe 90%) will select that value.
    et
  • Like other form inputs, a select menu should always have a label next to it (W3C standard)

  Nouvelle proposition
  Ajouter le label : Que faire avec votre sélection ?
  Et par défaut : Choisir une action…

  ps : à titre statistique, j’utilise souvent le bouton "Cocher les mises à jour" et la suite qui va bien :)