默认含有音频通道，改为播放时判断音频编码

Lawrence

2020-10-19 5ab432856deb79c26a3b4ea05e8582acf9e80cdc

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.DS_Store
node_modules/
/dist/
npm-debug.log*
yarn-debug.log*
yarn-error.log*
 
# Editor directories and files
.idea
.vscode
*.suo
*.ntvs*
*.njsproj
*.sln