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• How to install a 3rd party software with electron ?

  26 décembre 2016, par niksmac

  How to install a 3rd party software along with installing of electron app ?

  My use case is, I want to use ffmpeg inside my electron app, which is supposed to take screenshot from a video.

  Can I package the app in such a way that the user have to install only my app. And my app is installing ffmpeg for the user without any manual action.

  I would like to automate the process of installing ffmpeg during the electron app install on different OSs, if possible.

• Permission denied with JAVE on OSX

  18 octobre 2016, par clankill3r

  I try to convert video to audio using jave on OSX.

  http://www.sauronsoftware.it/projects/jave/manual.php

  As the documentation states

  ...You can even build it by yourself getting the code (and the
  documentation to build it) on the official ffmpeg site. Once you have
  obtained a ffmpeg executable suitable for your needs, you have to hook
  it in the JAVE library. That’s a plain operation.

  I builded ffmpeg, but running the code I get a Permission denied error.
  I even changed all file permissions to 777 recursive.
  Hope someone can help, the documentation and error messages are very unclear.

  public class Mp4ToSoundTest {
  
  
  
  
  
      public static void main(String[] args) {
  
          Mp4ToSoundTest a = new Mp4ToSoundTest();
  
          a.setup();
  
      }
  
  
  
      void setup() {
  
  
  
          File source = new File("/Users/doekewartena/Downloads/vids_future_proj/VID_20160523_180100.mp4");
  
  
  
          System.out.println(source.exists());
  
  
  
          FFMPEGLocator my_ffmpeg_locator = new FFMPEGLocator() {
  
              @Override
  
              protected String getFFMPEGExecutablePath() {
  
                  return "/Users/doekewartena/Downloads/ffmpeg-3.1.4";
  
              }
  
          };
  
  
  
  
  
          File target = new File("/Users/doekewartena/Downloads/vids_future_proj/VID_20160523_180100.mp3");
  
          AudioAttributes audio = new AudioAttributes();
  
          audio.setCodec("libmp3lame");
  
          audio.setBitRate(128000);
  
          audio.setChannels(2);
  
          audio.setSamplingRate(44100);
  
          EncodingAttributes attrs = new EncodingAttributes();
  
          attrs.setFormat("mp3");
  
          attrs.setAudioAttributes(audio);
  
          Encoder encoder = new Encoder(my_ffmpeg_locator);
  
  
  
          // The source file can't be decoded. It occurs when the source file container, the video stream format or the
  
          // audio stream format are not supported by the decoder. You can check for supported containers and plugged
  
          // decoders calling the encoder methods getSupportedDecodingFormats(), getAudioDecoders() and getVideoDecoders().
  
          try {
  
              String[] r = encoder.getSupportedDecodingFormats();
  
              System.out.println("a");
  
              for (String s : r) {
  
                  System.out.println(s);
  
              }
  
              System.out.println("b");
  
  
  
              System.out.println();
  
              System.out.println(encoder.getAudioDecoders());
  
  
  
          } catch (EncoderException e) {
  
              e.printStackTrace();
  
          }
  
  
  
  
  
  
  
          try {
  
              encoder.encode(source, target, attrs);
  
          } catch (EncoderException e) {
  
              e.printStackTrace();
  
          }
  
          System.out.println("done");
  
  
  
      }
  
  
  
  }

• how i can rotate video for 20 degrees ?

  2 août 2014, par user3447705

  How i can rotate video for 20 degrees ?

  FFMPEG not have option, where i can manual set degree.

  ffmpeg -i video.mp4 -acodec copy -sameq -vf transpose=1 out.mp4

  The various parameter values for "transpose" are :
  0 : rotate by 90 degrees counterclockwise and vertically flip
  1 : rotate by 90 degrees clockwise
  2 : rotate by 90 degrees counterclockwise
  3 : rotate by 90 degrees clockwise and vertically flip