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• Android ICS FFMPEG scale video not working

  20 avril 2015, par Android-Developer

  I am using Guardian Project Android Java FFMPEG library to resize videos. Current code which is working on android 5.0.1 / 5.1.0 / 4.4.4 :

      File fileTmp = getCacheDir();
  
      FfmpegController fc = null;
  
      try {
  
          fc = new FfmpegController(this, fileTmp);
  
      } catch (IOException e) {
  
          e.printStackTrace();
  
      }
  
      String path = Environment.getExternalStorageDirectory().getPath() + "/Movies/nexus.mp4";
  
      final String outPath = Environment.getExternalStorageDirectory().getPath() + "/Movies/test.mp4";
  
      final Clip out = new Clip(path);
  
      try {
  
          if (fc != null) {
  
              fc.convert(out, outPath, new ShellUtils.ShellCallback() {
  
                  @Override
  
                  public void shellOut(String shellLine) {
  
                      Log.e("", "SHELL OUT: " + shellLine);
  
                  }
  
  
  
                  @Override
  
                  public void processComplete(int exitValue) {
  
                      Log.e("", "PROCESS COMPLETE: " + exitValue);
  
                  }
  
              });
  
          }
  
      } catch (Exception e) {
  
          e.printStackTrace();
  
      }

  Using this code on Android 4.0.4 (Ice Cream Sandwich) doesn’t do anything. While testing on other devices exitValue in processComplete is always equal to 0, but on ICS it’s 11. Here is the output in LogCat :

  SHELL OUT: /data/data/org.hardartcore.ffmpeg/app_bin/ffmpeg -y -i /mnt/sdcard/Movies/NEXUS.mp4 -ab 160k -r ntsc-film -vf scale=568:320 -strict -2 /mnt/sdcard/Movies/Test.mp4
  
  PROCESS COMPLETE: 11

  I don’t think it’s something from ffmpeg, more like a problem when the library is trying to execute ffmpeg executable from raw folder in internal memory, but I can’t see any logs or errors which indicate that too.

  So my question is, if there is any mistake which I am doing using / running this code or something which can prevent ffmpeg executable from running on old devices with Android ICS ?

  Thanks in advance !

• FFmpeg Easing function doesn't behave as expected [closed]

  11 juin 2024, par Alejandro Sanchez

  What is the simplest way to add an easing function to an animation ? I'm currently trying to animate a zoom value, but for some reason, it goes completely over the final zoom value i constrained it to (my easing function should output values between 0 and 1) : This is the part of a bigger expression which i just cannot understand :

  


  if(gt(in_time\,3.7999999046325685)\,3 - ((0.3) * (((exp((5*(it-3.80)) - 1))/(exp(5*0.80)-1))))\,3)

  


  Note : (exp((5*(it-3.80)) - 1))/(exp(50.80)-1))) are values between 0 and 1 for the animation duration of 0.8 seconds, however the resulting zoom goes way beyond 3-0.31 = 2.7, it just goes crazy in the end.

  


  I tried all kinds of easing functions, all of them behave similarly

  


• Moviepy - Video background issue

  2 novembre 2015, par Harpreet Gill

  I have two video clips - Video1 and Video2. I want to place Video2 at a certain position of Video1, at a specific time. I am able to do it, but my problem is that Video2 has dark-black background, which appears in the final (output) video.

  Is there any option I can make Video2’s background transparent ?