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• Anomalie #2137 (Fermé) : Dans plugin.xml de spip mettre procure spip-bonux

  26 juin 2011, par cedric -

  Non. Spip-bonux fournit des choses que ne fournit pas le core 3.0 Les plugins qui n’utilisent que ce que fournit le core, doivent donc supprimer leur dépendance. Les autres doivent maintenir la dépendance à la version 3 allégée de spip-bonux. Pour résoudre ta question, il faut passer à paquet.xml, (...)

• How to convert multiple files from mp4 to flv using a shell script

  22 avril 2013, par jerdiggity

  Assuming I had a bunch of videos sitting inside the directory /home/user/videos/awaiting_conversion how would I go about using cron to run a script similar to this one to batch convert each video into a different format ?

  /bin/sh -c $'nice /usr/bin/ffmpeg -i \044'\'$'/home/user/videos/awaiting_conversion/video_file_1.mp4'\'$' -s \044'\'$'480x320'\'$' -vcodec libx264 -acodec libmp3lame -ab \044'\'$'64k'\'$' -vpre fast -crf \044'\'$'30'\'$' -ar \044'\'$'22050'\'$' -f flv -y \044'\'$'/home/user/videos/converted/video_file_1.flv'\'$''

  The above script works fine for a single conversion, but :

  1. It assumes that the name of the video is static/known (which will not be the case when batch converting).
  2. It assumes that there is only one video to convert (which may or may not be the case), i.e. there's no "loop".
  3. It leaves the original file in place instead of deleting it (which is what I would want to happen to prevent duplicate conversions).

  The ultimate question would be how do I run that script for each video that exists inside /home/user/videos/awaiting_conversion, passing the file name as a variable ?

• How to update SDL Texture with Frame Represented by ffmpeg in AVPicture Format

  4 juin 2014, par Whoami

  I receive a frame of format YUV from ffmpeg, and I convert into RGB format like below :

  sws_scale(pSwsCtx, (const uint8_t * const *) sFrame->data,
  
                                                  sFrame->linesize, 0, pCodecCtx->height,
  
                                                  dFrameRGB24->data,
  
                                                  dFrameRGB24->linesize);

  Now i have a Texture in SDL2 with format of SDL_PIXELFORMAT_RGB24

  Question :

  How do i Update dFrameRGB24 [ ie AVPicture], into SDL Texture ?

  Because

  SDL_UpdateTexture Expects raw data, and the number of pixels per line

  int SDL_UpdateTexture(SDL_Texture*    texture,
  
                        const SDL_Rect* rect,
  
                        const void*     pixels,
  
                        int             pitch)

  where as

  AVPicture has the below structure

  uint8_t * data [AV_NUM_DATA_POINTERS]
  
         pointers to the image data planes
  
  int     linesize [AV_NUM_DATA_POINTERS]
  
      number of bytes per line 

  How can i achieve the same ? Kindly help me.