Turning Java 8 BufferedImages into MP4s via JCodec or similar

Question

Java 8 here. And while I mention JCodec, that I'm open to any solution that works!

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In the JCodec README they provide a decent example for how one can turn a list of BufferedImages into an MP4 on disk like so:

SeekableByteChannel out = null;
try {
    out = NIOUtils.writableFileChannel("/tmp/output.mp4");
    // for Android use: AndroidSequenceEncoder
    AWTSequenceEncoder encoder = new AWTSequenceEncoder(out, Rational.R(25, 1));
    for (...) {
        // Generate the image, for Android use Bitmap
        BufferedImage image = ...;
        // Encode the image
        encoder.encodeImage(image);
    }
    // Finalize the encoding, i.e. clear the buffers, write the header, etc.
    encoder.finish();
} finally {
    NIOUtils.closeQuietly(out);
}

Instead of writing to a file system resource on the disk (such as "/tmp/output.mp4"), I'd like to write to a (fully MP4-compliant) in-memory buffer, ideally a byte[] or something that will convert into a byte[].

Is this possible to do with JCodec (maybe something inside of NIOUtils or similar)?