mpd 编译安装完用不了

环境

Ubuntu 18.04 ，其实用得是 Linux Mint 19.3

背景

apt install mpd 自带的 mpd 版本较低，故编译安装。

步骤

按照 https://www.musicpd.org/doc/html/user.html 中 Compiling from source¶安装详细安装日志烦请移步： https://pastebin.com/mG60p8q8 这里有一点比较有意思，就是最后一步ninja -C output/release install，前面不加 sudo 过不去。

问题表现

安装完后 mpd 报错找不到配置文件，

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [13:47:14] 
$ sudo mpd
exception: No configuration file found

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [13:47:19] C:1
$ mpd
exception: No configuration file found

需要 touch 创建 /etc/mpd.conf，然后指定配置文件运行，是不是前面步骤没做好？（问题一）

明明没有运行 mpd，但是还提示 Address already in use，这是啥原因？（问题二）


# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:23] 
$ netstat -antlp | grep mpd
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:28] C:1
$ netstat -antlp | grep 6600
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:52] C:1
$ mpd /etc/mpd.conf         
exception: bind to '0.0.0.0:6600' failed (continuing anyway, because binding to '[::]:6600' succeeded): Failed to bind socket: Address already in use
output: No 'audio_output' defined in config file
output: Successfully detected a sndio audio device

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:58] 
$ netstat -antlp | grep 6600
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp6       0      0 :::6600                 :::*                    LISTEN      32660/mpd           

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:14:19] 
$ ps -ef | grep mpd         
mint64   32660  3068  0 14:13 ?        00:00:00 mpd /etc/mpd.conf
mint64   32703  3668  0 14:14 pts/0    00:00:00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn --exclude-dir=.idea --exclude-dir=.tox mpd

服务都没装上的吗，看之前提示是装到 /usr/local/lib/systemd/system 了，这个怎么运行呐。（问题三）

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:18:13] C:4
$ systemctl status mpd.service
Unit mpd.service could not be found.

闲言碎语

为了用 Linux，我最近感觉又有了年轻时的激情，但是总是遇到问题，啥时候才能配置好 i3wm 。

hanssx

2021-02-24 14:28:20 +08:00

ffmpeg 最新版信息
```
$ ffmpeg
ffmpeg version 4.3.2-0york0~18.04 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
configuration: --prefix=/usr --extra-version='0york0~18.04' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libzimg --enable-pocketsphinx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil 56. 51.100 / 56. 51.100
libavcodec 58. 91.100 / 58. 91.100
libavformat 58. 45.100 / 58. 45.100
libavdevice 58. 10.100 / 58. 10.100
libavfilter 7. 85.100 / 7. 85.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
libpostproc 55. 7.100 / 55. 7.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

```

ffmpeg 应该没问题，我用其他软件 vlc 是可以正常播放歌曲的，alsa 应该也没问题，现在问题就是 mpd+mpc 方式播放歌曲，有些歌曲播放不了，会被 skip 跳过，然后切换歌曲的时候还有“喇叭声”（就是很烦的瞬间声音很大的噪音）。

@huangmingyou 大佬好，最近打算重新学习打造 i3wm，主要是把 mpd 放到 polybar 上面，然后它还是个 terminal music player，看着也够轻量，但一直没配置好，折腾好久了。

hanssx

2021-02-24 16:35:54 +08:00

```
Feb 24 16:31 : mad: input does not appear to be a mp3 bit stream
[src/libmpg123/parse.c:1185] error: Giving up searching valid MPEG header after 65536 bytes of junk.
Feb 24 16:31 : mpg123: mpg123_getformat() failed: Message: I am done with this track.
Feb 24 16:31 : ffmpeg/opus: Could not update timestamps for skipped samples.
```

拿第一个报错的解码模块 mad 来说，已经是最新版本了呀

```
sudo apt install libmad0-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libmad0-dev is already the newest version (0.15.1b-9ubuntu18.04.1).
```

这在 mpd 的官方文档中安装依赖部分好像都已经安装了。。。
```
libmad0-dev libmpg123-dev libid3tag0-dev \
libflac-dev libvorbis-dev libopus-dev
```