Recherche avancée

Sur d’autres sites (7329)

• FFMPEG on Android java application

  11 juillet 2015, par Kim T

  I’m prototyping a Hybrid app using Cordova : https://cordova.apache.org. Also using this plugin : https://github.com/jbavari/cordova-plugin-video-editor

  The plugin renders a video into new formats using FFMPEG. The specific piece of code which does this is here :

  https://github.com/jbavari/cordova-plugin-video-editor/blob/master/src/android/VideoEditor.java

  al.add("ffmpeg");
  
  al.add("-i");
  
  al.add(videoSrcPath);
  
  String[] ffmpegCommand = al.toArray(new String[al.size()]);
  
  vk.run(ffmpegCommand, workFolder, appContext);
  
  Log.d(TAG, Arrays.toString(ffmpegCommand));

  When logged out in Android Studio with variables it is :

  [ffmpeg, -y, -i, /storage/emulated/0/DCIM/Camera/20150709_172753.mp4, -strict, experimental, -s, 320x320, -r, 24, -vcodec, libx264, -preset, ultrafast, -b, 2097152, -ac, 1, -ar, 22050, -t, 2.0, /storage/emulated/0/Movies/HelloWorld/VID_render-1436477283566.mp4]

  This is working perfectly.

  I want to modify this command to allow multiple videos, and other options. Here is an FFMPEG terminal command i’ve tested on my machine working :

  ./ffmpeg -i a.mp4 -i b.mp4 -filter_complex "[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]" -loglevel debug -strict -2 output.mp4

  I’ve attempted to modify the java code but this fails :

  al.add("ffmpeg");
  
  al.add("-i");
  
  al.add(videoSrcPath); 
  
  al.add("-i");
  
  al.add(videoSrcPath2);
  
  al.add("-filter_complex");
  
  al.add("[0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a]");
  
  al.add("-map");
  
  al.add("[v]");
  
  al.add("-map");
  
  al.add("[a]");
  
  al.add("-strict");
  
  al.add("-2");

  This is the failing command when logged out with variables :

  [ffmpeg, -y, -i, /storage/emulated/0/DCIM/Camera/20150709_175137.mp4, -i, /storage/emulated/0/Movies/HelloWorld/20150709_234321.mp4, -filter_complex, [0:0] [0:1] [1:0] [1:1] concat=n=2:v=1:a=1 [v] [a], -map, [v], -map, [a], -strict, -2, experimental, -s, 320x320, -r, 24, -vcodec, libx264, -preset, ultrafast, -b, 2097152, -ac, 1, -ar, 22050, -t, 2.0, /storage/emulated/0/Movies/HelloWorld/VID_render-1436478706526.mp4]

  I try to use the logging feature of FFMPEG, I can’t get it to return back to the Java Log, which really restricts what I can debug :(

  al.add("-loglevel");
  
  al.add("debug");

  Any help would be greatly appreciated !

• cosmetics : trim trailing whitespace

  18 juin 2010, par John Koleszar

  cosmetics : trim trailing whitespace

• FFMPEG in Java (runtime error)

  4 juillet 2012, par Eric

  I want to write a program that converts video into frames using FFMPEG. When I use it on the Ubuntu terminal, it works fine. But when I try to put it into the Java code, it gives me a runtime error. Did I make a mistake in my code below ?

  import java.util.*;
  
  import java.awt.*;
  
  import java.lang.*;
  
  import java.lang.Runtime;
  
  import java.io.*;
  
  import java.io.IOException;
  
  
  
  public class ConvertVideoToImage
  
  {
  
      private SingletonServer ss = null;
  
  
  
      public ConvertVideoToImage(SingletonServer ss)
  
      {
  
          this.ss = ss;
  
      }
  
  
  
      public void run()
  
      {
  
          convertVideo();
  
      }
  
  
  
      public void convertVideo()
  
      {
  
          try
  
          {
  
              Runtime rt = Runtime.getRunTime().exec("ffmpeg" + "-i" +         "display.wmv" + "image%d.jpg");
  
          }
  
          catch(Exception e){}
  
      }
  
  
  
  }

  Edit :

  I have changed the code like you suggested, but it also doesn't work. And when I Googled it, I found out that someone put the full path inside the executable and it became like this :

  Runtime.getRuntime().exec("/home/pc3/Documents/ffmpeg_temp/ffmpeg -i display.wmv image%d.jpg")

  BTW, thanks for the reply. I have another question. Is it possible to make a counter for FFMPEG ? I used this command in the Ubuntu terminal to make it convert a video to 30 frames/1seconds :

  ffmpeg -i display.wmv image%d.jpg

  This will automatically generate numbers like image1.jpg, image2.jpg, to image901.jpg. Is it possible to make a counter for this ? Because I need to count the files and control the number.

  Thanks in advance.