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相信我们都会或多或少需要给前端返回视频或者音频的一些信息，那么今天这篇文章通过Java语言使用javacv来获取视频、音频、图片等元数据信息（分辨率、大小、帧等信息）
一、首先导入依赖
可以先导入javacv/javacv-platform依赖，由于依赖比较大，所以我们可以先去除部分不需要的依赖如下：
<dependency><groupId>org.bytedeco</groupId><artifactId>javacv</artifactId><version>1.4.4</version><exclusions><exclusion><groupId>org.bytedeco</groupId><artifactId>javacpp</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>flycapture</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>libdc1394</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>libfreenect</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>libfreenect2</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>librealsense</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>videoinput</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>opencv</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>tesseract</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>leptonica</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>flandmark</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>artoolkitplus</artifactId></exclusion></exclusions></dependency><dependency><groupId>org.bytedeco</groupId><artifactId>javacv-platform</artifactId><version>1.4.4</version><exclusions><exclusion><groupId>org.bytedeco</groupId><artifactId>javacv</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>flycapture-platform</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>libdc1394-platform</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>libfreenect-platform</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>libfreenect2-platform</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId><artifactId>librealsense-platform</artifactId></exclusion><exclusion><groupId>org.bytedeco.javacpp-presets</groupId>