How to create a video from an array of images in Android?

Question

I want to call a function and build a video out of list of images, and then save it locally on the device:

public void CreateAndSaveVideoFile(List

        

Answer 1

jCodec has added Android support.

You need to add these to your gradle...

implementation 'org.jcodec:jcodec:0.2.3'
implementation 'org.jcodec:jcodec-android:0.2.3'

...and

android {
    ...
    configurations.all {
        resolutionStrategy.force 'com.google.code.findbugs:jsr305:3.0.2'
    }
}

I can confirm this works as expected, but with caveats. First being I tried some full size images and the file wrote, but gave an error on playback. When I scaled down, I would get an error if the width or height of the image was not even because it requires a multiple of 2 for YUV420J colorspace.

Also worthy of note, this makes your package HEAVY, heavy. My small project went over the dex limit by adding this and required enabling multidex.

FileChannelWrapper out = null;
File dir = what ever directory you use...
File file = new File(dir, "test.mp4");

try { out = NIOUtils.writableFileChannel(file.getAbsolutePath());
      AndroidSequenceEncoder encoder = new AndroidSequenceEncoder(out, Rational.R(15, 1));
      for (Bitmap bitmap : bitmaps) {
          encoder.encodeImage(bitmap);
      }
      encoder.finish();
} finally {
    NIOUtils.closeQuietly(out);
}