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• How to import FFmpeg into Android project

  30 mai, par Vyacheslav Parinov

  I'm trying to convert series of images into video.
For that I'm adding FFmpeg into my Android project.
However it is not adding properly, so I can't import class FFmpeg into the code.
in the statement "int rc = FFmpeg.execute(command) ;" FFmpeg is highlighted in red.

  


  I think something wrong with libraries. Could you please give suggestion how import libraries correctly ?

  


  My Manifest file below

  


  <?xml version="1.0" encoding="utf-8"?>


  


  


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  My settings.gradle file

  


  pluginManagement {
repositories {
    google()
    mavenCentral()
    gradlePluginPortal()
}


  


  


  dependencyResolutionManagement {
repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
repositories {
    google()
    mavenCentral()
}


  


  
rootProject.name = "TimelapseLite"
include ':app'

  


  My build.gradle file

  


  plugins {
    id 'com.android.application'
}

android {
    namespace 'ae.vpdev.timelapselite'
    compileSdk 33

defaultConfig {
    applicationId "ae.vpdev.timelapselite"
    minSdk 26
    targetSdk 33
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}

buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}
compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}


  


  


  dependencies

  


  implementation 'androidx.appcompat:appcompat:1.6.1'
implementation 'com.google.android.material:material:1.9.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
implementation 'com.arthenica:mobile-ffmpeg-full:4.5.LTS'
testImplementation 'junit:junit:4.13.2'
androidTestImplementation 'androidx.test.ext:junit:1.1.5'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.5.1'


  


  


  My code in MainActivity

  


  private void convertImagesToVideo() {
    StringBuilder imageListFileContent = new StringBuilder();
    for (Uri imageUri : selectedImages) {
        imageListFileContent.append("file '").append(imageUri.getPath()).append("'\n");
    }

    try {
        File imageListFile = new File(getCacheDir(), "image_list.txt");
        FileWriter writer = new FileWriter(imageListFile);
        writer.append(imageListFileContent.toString());
        writer.flush();
        writer.close();

        File outputFile = new File(getExternalFilesDir(null), "output_video.mp4");
        String outputFilePath = outputFile.getAbsolutePath();

        String command = "-f concat -safe 0 -i " + imageListFile.getAbsolutePath() +
                " -vf \"scale=-2:720\" -r 30 -c:v libx264 -pix_fmt yuv420p " + outputFilePath;

        int rc = FFmpeg.execute(command);

        if (rc == RETURN_CODE_SUCCESS) {
            Log.d("FFmpeg", "Video conversion completed successfully");
            // Now you can use the outputFilePath to play or share the video
        } else {
            Log.d("FFmpeg", "Video conversion failed");
        }
    } catch (IOException e) {
        e.printStackTrace();
    }
}


  


• How to make FFmpeg automatically inject mp3 audio tracks in the single cycled muted video ?

  5 décembre 2020, par Grrzly

  everybody here ! So basically this is what I want to achieve :

  


  I have a muted video about 3 minutes long.
I have a list of audio tracks in mp3 format (40 songs in a folder with duration 2 to 6 mins each one)

  


  I want this video to play cycled automatically taking songs from playlist and injecting them to the video one by one. Every time a song finishes the next one from the list should start playing at the moment. Video continues playing and doesn't care duration of tracks.

  


  I consider it as the first step on the way to broadcast radio with a video background on youtube in 24/7 mode with ability to put additional tracks to playlist without need to stop translation.

  


  My problem is that I'm new in FFmpeg and I would appreciate any suggestions regarding which FFMpeg topic to start investigate with in order to achieve my goal

  


• AAC encoder : encode out-of-phase I/S efficiently

  10 janvier 2016, par Claudio Freire

  AAC encoder : encode out-of-phase I/S efficiently
  Use the ability to invert phase with ms_mask instead of changing
  
  the codebook when possible, to avoid having to switch codebooks
  
  if some bands are INTENSTY_BT and others are INTENSITY_BT2, since
  
  usually a set ms_mask uses less bits that a codebook change. While
  
  it may not always be a win (ie : if it causes an ms_mask bitmap
  
  to be sent when it wouldn’t have been otherwise), it’s unlikely
  
  since the ms_mask bitmap will almost always be there already for
  
  M/S itself.
  

  • [DH] libavcodec/aacenc_is.c