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• How do I edit my video files this way using FFMPEG ?

  3 mars 2023, par alex.

  I want to take two video files (normal.mp4, layout.mp4) and edit them in multiple steps like this :

  


  

  1. Take normal.mp4 and reduce the video and audio speed to 50%, and copy it (as slow.mp4 for example)

  


  2. Add fade in and fade out to all three files

  


  3. Combine the files, in the order : normal.mp4, slow.mp4, layout.mp4

  


  4. Output into one video called output.mp4

  


  


  I'd like for this to all be done in one FFMPEG command, but if that's not possible that is fine. I would like to keep the audio bitrate of the slow.mp4 file at 320kbs, while also outputting the final product at 60fps (normal.mp4 and layout.mp4 and 120fps mp4 files)

  


  I tried to edit just one to halve the speed and add fade in/fade out, however I was having issues with errors there.

  


• avcodec/opus_silk : Remove wrong size information in function declaration

  13 septembre 2021, par Andreas Rheinhardt

  avcodec/opus_silk : Remove wrong size information in function declaration
  silk_lsp2poly()'s declaration contained arrays with array sizes ;
  
  yet these array sizes exceeded the number of actually accessed array
  
  elements (which is related to another parameter) and this leads to
  
   Wstringop-overflow= warnings from GCC 11, because the arrays provided
  
  by callers are only large enough for the actually used elements.
  So replace the incorrect array sizes with comments containing
  
  the correct array sizes. Given that these sizes are not compile-time
  
  constants, they can only be communicated via a comment.
  Reported by Paul B Mahol.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
  

  • [DH] libavcodec/opus_silk.c

• Crash is happening while playing a video where my iOS app is integrated with VideoKit and mobileFFMpeg frameworks

  25 juin 2019, par vinay

  I am using MobileFFMpeg for executing the FFmpeg commands in ios application , As I am using mobileFFMPeg for sending the live stream from ip camera to Azure server ..... And it is working fine

  And the problem is my application is crashing when I integrate the iOS VideoKit with this MobileFFmpeg

  This is the cocoapod that I have used to installed the MobileFFMpeg

  pod 'mobile-ffmpeg-full-gpl', '~> 4.2'

  MobileFFmpeg.execute("-i video.mkv -codec copy video.mp4") ---------- for executing ffmpeg commands

  if(avformat_find_stream_info(_avFmtCtx, opts) < 0) {
  
      [self setDecoderState:kVKDecoderStateConnectionFailed errorCode:kVKErrorStreamInfoNotFound];
  
      return kVKErrorStreamInfoNotFound;
  
  }

  ---------------------------> This is the point where the application is crashing while playing a video with the videoKit framework. :)

  I expect iOS VideoKit with work fine with MobileFFmpeg without any crashes and execute the ffmpeg commands. :)