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• Creating a composite mixing of multiple videos

  12 octobre 2015, par redA

  I have three video files

  1.webm, 2.webm, 3.webm
  1.webm, say was recorded from 10:30AM-11:00AM,
  2.webm, say was recorded from 10:35AM-11:00AM
  3.webm, say was recorded from 10:45AM-11:55AM.

  Is there a way I can mix audio & video from all the three files into one, as if they were in a conference. The final output file
  1. should contain video from 1.webm for the first 5 mins
  2. An overlay video from 1.webm and 2.webm for the next 10 mins
  3. An overlay video from 1.webm, 2.webm and 3.webm for the next 10 mins
  4. An overlay video from 1.webm and 2.webm for the last 5 mins.

• Anomalie #3570 (Nouveau) : erreur avec _DEV_PLUGINS

  22 octobre 2015, par jluc -

  Si _DEV_PLUGINS vaut par exemple true au lieu d’un numéro de version,
  SVP installe tout ce qu’on lui demande sans sourciller et
  les messages sont tous en vert "bien activé, bien installé".
  Super !
  Mais le plugin et ses dépendances, au final, ne sont pas installés activés.
  Et il n’y a aucun log.

  Il faudrait au moins mettre un log,
  au mieux tester avant d’installer tout et signaler l’impossibilité et arrêter l’install.
  Détecter et signaler que le format de la constante n’est pas un n° de version valide serait un plus.

• Static image and a folder of mp3's ?

  28 juin 2013, par Shirohige

  I want to create a bunch of videos consisting of an single image which is shown throughout the whole video but each video has a different audio file. I can do it manually with various tools but the problem is that I have a lot of audio files and I can't optimize the frame rate (more on that later) and it takes a lot of time to do it that way but ffmpeg offers everything I need but the problem is that I don't know how to batch process everything.

  The basic code :
  ffmpeg -i song-name.mp3 -loop 1 -i cover.jpg -r frame-rate -t song-length -acodec copy output.mp4

  What I want to achieve :
  Let's say that I have a folder which consists of several audio files : song-name-1.mp3, song-name-2.mp3, ..., song-name-n.mp3 and cover.jpg.

  I need a batch file which takes the name of every mp3 file in a folder (a FOR loop I suppose) and processes it with the same command :
  ffmpeg -i song-name.mp3 -loop 1 -i cover.jpg -r frame-rate -t song-length -acodec copy output.mp4

  So the image is always the same for every video. The song length can be taken with the tool mp3info and the corresponding command :
  mp3info.exe -p %S song-name.mp3

  Since I only have one image throughout the whole video, the optimal frame rate would be the inverse of the video length which is 1/length (where length is a variable in seconds which we get from mp3info).

  So the final code should look something like this :
  ffmpeg -i song-name.mp3 -loop 1 -i cover.jpg -r 1/length -t length -acodec copy song-name.mp4

  Where "song-name" is a variable which changes for every iteration of the FOR loop (i.e. for every audio file in the folder) and length is a variable whose value we get with the command :
  mp3info.exe -p %S song-name.mp3

  I found examples of a FOR loop to fetch all file names of all mp3's in a specific folder but I do not know how to integrate mp3info. I hope that somebody can help me and I have some knowledge of the C programming language if that can be used in any way.