添加背景音乐 @param videoin 视频文件 @param audioin 音频文件 @param output 输出路径 @param videoVolume 视频原声音音量(例:0.7为70%) @param audioVolume 背景音乐音量(例:1.5为150%) @param onEditorListener 回调监听
(String videoin, String audioin, String output, float videoVolume, float audioVolume, OnEditorListener onEditorListener)
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