利用AndroidMediaCodecAPI来加工mp4视频，可实现滤镜、旋转、缩放SampleVideoNofilterGlGlayScaleFilterapplyGlMonochromeFilterapplyGlWatermarkFilterapplyGradle    dependencies {        // jCenter        implementation 'com.daasuu:Mp4Composer-android:0.1.1'    }Usage    new Mp4Composer(srcMp4Path, destMp4Path)