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比特率:也叫碼率,每秒的數據流量,同樣分辨率,比特率越大,畫面越清晰,壓縮比越小,音質越好。文件體積也越大。
channelCount:省道數目。單聲道、雙聲道。
sampleRate: 采樣率
常見音頻編碼格式:
public static final String MIMETYPE_AUDIO_AMR_NB = "audio/3gpp";public static final String MIMETYPE_AUDIO_AMR_WB = "audio/amr-wb";public static final String MIMETYPE_AUDIO_MPEG = "audio/mpeg";public static final String MIMETYPE_AUDIO_AAC = "audio/mp4a-latm";public static final String MIMETYPE_AUDIO_QCELP = "audio/qcelp";public static final String MIMETYPE_AUDIO_VORBIS = "audio/vorbis";public static final String MIMETYPE_AUDIO_OPUS = "audio/opus";public static final String MIMETYPE_AUDIO_G711_ALAW = "audio/g711-alaw";public static final String MIMETYPE_AUDIO_G711_MLAW = "audio/g711-mlaw";public static final String MIMETYPE_AUDIO_RAW = "audio/raw";public static final String MIMETYPE_AUDIO_FLAC = "audio/flac";public static final String MIMETYPE_AUDIO_MSGSM = "audio/gsm";public static final String MIMETYPE_AUDIO_AC3 = "audio/ac3";public static final String MIMETYPE_AUDIO_EAC3 = "audio/eac3";
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