Recherche avancée

Sur d’autres sites (5660)

• How can i make the video has no index positions and no total lenght just like raw bitstream format, but it can have audio stream go along ?

  5 novembre 2018, par Adam Estel

  How can i make the video has no index positions and no total lenght,it cannot speed up slow down on a video player and it can have audio stream go along, with ffmpeg code ?
  I’ve research for a while but i only stuck at the way to exact raw bitstream (annex B) video
  Thank you for your guidance.

• Obtain the total number of samples with FFMpeg

  10 octobre 2018, par Henricus V.

  Currently my application reads audio files based on a while-realloc loop :

  // Pseudocode
  
  float data* = nullptr;
  
  int size = 0;
  
  AVFrame* frame;
  
  while(readFrame(formatContext, frame))
  
  {
  
      data = realloc(data, size + frame.nSamples);
  
      size += frame.nSamples;
  
      /* Read frame samples into data */
  
  }

  Is there a way to obtain the total number of samples in a stream at the beginning ? I want to be able to create the array with new[] instead of malloc.

• How to render a 7 minutes video duration but only play 4 minutes and then stop but total length of video is still remain 7 minutes with ffmpeg ?

  7 août 2018, par Adam Estel

  How to render a 7 minutes video duration but only play 4 minutes and then stop but total length of video is still remain 7 minutes when i uploaded it to youtube, just like this image :
  enter image description here

  I try nullsrc fillter but it didn’t success,it’s still play entire 7 minutes to end video not 4 minutes
  I had researched google but i didn’t have a clue, then is there a way to do it ?