public void setMp4Settings(Mp4Settings mp4Settings) {
        this.mp4Settings = mp4Settings;
    }
These settings relate to your MP4 output container. You can create audio only outputs with this container. For
more information, see
https://docs.aws.amazon.com/mediaconvert/latest/ug/supported-codecs-containers-audio-only.html
#output-codecs-and-containers-supported-for-audio-only.

@param mp4Settings
       These settings relate to your MP4 output container. You can create audio only outputs with this container.
       For more information, see
       https://docs.aws.amazon.com/mediaconvert/latest/ug/supported-codecs-containers-audio
       -only.html#output-codecs-and-containers-supported-for-audio-only.
aws-java-sdk-mediaconvert/src/main/java/com/amazonaws/services/mediaconvert/model/ContainerSettings.java