Recherche avancée

Sur d’autres sites (6919)

• FFmpeg - cannot find ExecuteBinaryResponseHandler - Android/Java

  20 juillet 2018, par pudility

  I am trying to make a module for react-native that will change a video into a gif. I have little to no experience with android studios/java, but I would love to learn more ! I am using this library to convert the video to a gif. Here is my code :

  package com.reactlibrary;
  
  
  
  import android.widget.Toast;
  
  import com.facebook.react.bridge.ReactApplicationContext;
  
  import com.facebook.react.bridge.ReactContextBaseJavaModule;
  
  import com.facebook.react.bridge.ReactMethod;
  
  import com.github.hiteshsondhi88.libffmpeg.FFmpeg;
  
  
  
  public class RNGifMakerModule extends ReactContextBaseJavaModule {
  
  
  
    private final ReactApplicationContext reactContext;
  
  
  
    public RNGifMakerModule(ReactApplicationContext reactContext) {
  
      super(reactContext);
  
      this.reactContext = reactContext;
  
    }
  
  
  
    @Override
  
    public String getName() {
  
      return "RNGifMakerModule";
  
    }
  
  
  
    @ReactMethod
  
    public void alert(String message) {
  
        Toast.makeText(getReactApplicationContext(), "Error", Toast.LENGTH_LONG).show();
  
        String[] cmd = {"-i"
  
                , message
  
                , "Image.gif"};
  
        conversion(cmd);
  
    }
  
  
  
    public void conversion(String[] cmd) {
  
  
  
      FFmpeg ffmpeg = FFmpeg.getInstance(this.reactContext);
  
  
  
      try {
  
  
  
  
  
        // to execute "ffmpeg -version" command you just need to pass "-version"
  
        ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {
  
  
  
          @Override
  
          public void onStart() {
  
          }
  
  
  
          @Override
  
          public void onProgress(String message) {
  
          }
  
  
  
          @Override
  
          public void onFailure(String message) {
  
          }
  
  
  
          @Override
  
          public void onSuccess(String message) {
  
          }
  
  
  
          @Override
  
          public void onFinish() {
  
          }
  
        });
  
      } catch (FFmpegCommandAlreadyRunningException e) {
  
        // Handle if FFmpeg is already running
  
        e.printStackTrace();
  
      }
  
    }
  
  }

  And I get this error :

  Error:(43, 31) error: cannot find symbol class ExecuteBinaryResponseHandler

  This seems odd to be, because in the documentation for ffmpeg-android-java it says to use almost exactly the same code.

  Bounty

  The bounty will be awarded to you if you can find a way to convert a video.mp4 into a gif. You do not necessarily have to use FFmpeg, but your solution has to work with java/android studios.

• How do I make audio work with pulseaudio in systemd ? [migrated]

  1er avril 2022, par user5827693

  I'm trying to live stream my website to the rtmp server via pulseaudio, ffmpeg and chromium in ubuntu 20.04. Everything works great if I execute the following commands in shell :

  


  pulseaudio&
ffmpeg -y -f x11grab -draw_mouse 0 -s 1280x720 -i :1.0+0,0 -f pulse -ac 2 -i default -c:v libx264 -c:a aac -b:a 128k -f flv MY_SERVER &> /dev/null < /dev/null &
DISPLAY=:1.0 chromium-browser --autoplay-policy=no-user-gesture-required --disable-gpu --user-data-dir=/tmp/test --window-position=0,0 --window-size=1280,720 --app=MY_URL &


  


  However if I try to setup the same logic via systemd - everything works fine, except there is no audio. Below are my systemd files.

  


  pulseaudio.service

  


  [Unit]
Description=PulseAudio system server

[Service]
User=ubuntu
Type=notify
ExecStart=/usr/bin/pulseaudio --daemonize=no
Restart=always

[Install]
WantedBy=multi-user.target


  


  chromium.service

  


  [Unit]
Description=start chromium browser
After=pulseaudio.service

[Service]
User=ubuntu
Type=simple
Environment=DISPLAY=:1.0
ExecStart=/usr/bin/chromium-browser --autoplay-policy=no-user-gesture-required --disable-gpu --user-data-dir=/tmp/test --window-position=0,0 --window-size=1280,720 --app=MY_URL
Restart=always

[Install]
WantedBy=multi-user.target


  


  ffmpeg.service

  


  [Unit]
Description=start ffmpeg
Requires=display.service pulseaudio.service
After=pulseaudio.service

[Service]
User=ubuntu
Type=simple
ExecStart=/usr/bin/ffmpeg -y -f x11grab -draw_mouse 0 -s 1280x720 -i :1.0+0,0 -f pulse -ac 2 -i default -c:v libx264 -c:a aac -b:a 128k -f flv MY_SERVER
Restart=always

[Install]
WantedBy=multi-user.target


  


  I do not see any errors in my syslog regarding the audio. I can't figure out why it would work from shell but not from systemd.

  


  I tried the following :

  


  

  • Ran pulseaudio systemwide

  


  • Tried to setup systemd under root user

  


  • Tried to setup systemd under non root user

  


  • Tried all possible pulseaudio params

  


  


• FFMPEG, how to create custom waveform

  9 juin 2017, par Bodie Leonard

  I have done research trying to create a waveform with FFMPEG and am currently able to create a white png with the wave being transparent. The goal is to generate the wave like the smooth wave below and have the grey be transparent.
  

  Here is my current FFMPEG waveform generator and output.

  ffmpeg -i ./_test.mp3 -filter_complex \
  
  "[0:a]aformat=channel_layouts=mono,compand=gain=-6, \
  
  showwavespic=s=450x46:colors=white,negate[a]; \
  
  color=white:450x46[c]; \
  
  [c][a]alphamerge"  -vframes 1 _test.png