Internet Radio

MPlayer 混音(Audio Mixing)

要使 MPlayer 可以支援混音，必須符合以下項目：

1. 必須使用 ALSA 音效驅動模式，OSS 不支援混音
2. MPlayer 編譯時必須加上 alsa 支援參數，檢查 mplayer 是否已支援 alsa，執行
   #mplayer -ao help
3. MPlayer 的播放指令
   支援混音 #mplayer -ao alsa -cache 256 .......
   不支援混音 #mplayer -ao alsa:device=hw=0.0 .......
4. 混音播放時，聲音如果有出現明顯的雜音，解決方式如下
   編輯 /etc/asound.conf

pcm.!default {
  type plug
  slave.pcm {
    type dmix
    ipc_key 1024
    slave {
       pcm "hw:0,0"
       rate 44100
    }
  }
}

參考網站：

• http://mpd.wikia.com/wiki/Tuning
• http://alsa.opensrc.org/Dmix

lircrc for Mplayer

/etc/lirc/lircrc

begin
        button = mute
        prog = mplayer
        config = mute
        repeat = 0
end
begin
        button = power
        prog = mplayer
        config = quit
        repeat = 2
end
begin
        button = chUp
        prog = mplayer
        config = pt_step -1
        repeat = 0
end
begin
        button = chUp_V2
        prog = mplayer
        config = pt_step -1
        repeat = 0
end
begin
        button = chDown
        prog = mplayer
        config = pt_step 1
        repeat = 0
end
begin
        button = chDown_V2
        prog = mplayer
        config = pt_step 1
        repeat = 0
end
begin
        button = volUp
        prog = mplayer
        config = volume 47
        repeat = 0
end
begin
        button = volUp_V2
        prog = mplayer
        config = volume 47
        repeat = 0
end
begin
        button = volDown
        prog = mplayer
        config = volume -47
        repeat = 0
end
begin
        button = volDown_V2
        prog = mplayer
        config = volume -47
        repeat = 0
end

Debian 5.0 編譯 MPD

apt-get install wget build-essential libglib2.0-dev
apt-get install libasound2-dev libmms-dev libshout3-dev libmpcdec-dev libao-dev

wget http://downloads.sourceforge.net/project/musicpd/mpd/0.17.3/mpd-0.17.3.tar.bz2?r=http%3A%2F%2Fmpd.wikia.com%2Fwiki%2FServer&ts=1365082963&use_mirror=nchc -O mpd-0.17.3.tar.bz2
tar xjf mpd-0.17.3.tar.bz2
cd mpd-0.17.3
./configure --prefix=/opt/mpd
make
make install

交叉編譯 MPD

下載 mpd-0.17.3.tar.bz2

• http://sourceforge.net/projects/musicpd/
• http://mpd.wikia.com/wiki/Git
   

開始編譯

tar xjf mpd-0.17.3.tar.bz2
cd mpd-0.17.3/