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README
Apache-2.0

AudioVideoCodec

一款视频录像机,支持AudioRecord录音、MediaCodec输出AAC、MediaMuxer合成音频视频并输出mp4,支持自动对焦、屏幕亮度调节、录制视频时长监听、手势缩放调整焦距等

功能简介

目前包含基本的音频、视频录制与合成操作,功能如下:

  1. 基于AudioRecord录制原始PCM格式音频数据
  2. 基于MediaCodec编码输出音频为AAC格式
  3. 基于MediaCdec.createInputSurface()创建Surface,EGLContext绑定Surface并通过渲染FBO已绑定的纹理录制视频
  4. 基于FBO离屏纹理绘制水印纹理并添加至录制视频文件
  5. 基于MediaMuxer合成音频、视频数据并输出MP4视频文件
  6. 提供基于shader语言修改片元着色器color完成黑白滤镜
  7. 提供相机预览时自动调节预览焦距、屏幕亮度
  8. 提供相机预览时切换闪光灯、前后置摄像头
  9. 提供相机预览时双指缩放调节预览画面、SeekBar拖动调节

未实现:

  1. 手动点击屏幕聚焦缩放预览画面

  2. 横屏预览、录制时上下滑动屏幕左半部分调节屏幕亮度、右半部分调节音频音量

  3. 预览滤镜贴纸、美颜等其它滤镜功能

  4. 音频录制时回声消除、静音降噪

    未实现原因 : 该部分内容需要对OpenGL ES绘制原理、音频数据存储、手势滑动处理、Camera相机聚焦等需要有深入理解

采坑之旅

  1. 前后摄像头切换 目前测试的华为P8max上由后置切换为前置时,始终报setParameters failed,经过逐行代码验证,是由于设置parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO) 自动对焦导致,部分华为、三星手机前置摄像头不允许聚焦(目前自有测试机如此,如果有华为、三星手机测试可行欢迎提供型号)

  2. 自动对焦失效问题 目前项目中自动对焦采用的是 : parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);遇到的问题就是移动屏幕时对焦会屏幕闪烁, 包括Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO;因手动点击聚焦未实现,此处未深入研究适配所有机型,欢迎测试其它机型并给出有效方案!

  3. 设置Camera预览大小、图片大小导致setParameters failed 目前项目CameraManager管理类中,通过获取手机设备支持的预览大小、图片大小,取最适合当前预览的尺寸,解决上述问题;一般报setParameters failed需要检查 对Camera.Parameters设置的参数仔细检查

  4. MediaCodec.queueInputBuffer参数中的时间戳问题 之前对该处时间戳计算公式理解有误,导致录制的视频始终无法播放,一帧音频帧大小 int size = 采样率 x 位宽 x 采样时间 x 通道数,此处时间戳单位时微秒, pcm录制的原始单位是bit,双声道16bit,采用byte[]、short[]装载数据需要进行换算,1 byte = 8 bit,项目中有详细注释,欢迎查证!

公共库

目前该项目直接是以单个Activity承载预览、录制、闪光灯、切换镜头、黑白滤镜、手势缩放、SeekBar显示缩放进度等功能,library提供的是aop权限申请库

截图展示

初始预览 :

image

闪光灯 :

image

滤镜:

image

录制中 :

image

后置切换前置 :

image

播放水印视频 :

image

感谢开源

https://github.com/ChinaZeng/SurfaceRecodeDemo

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