在过去的两天里,我一直在寻找一种通过我的 Raspiberry pi 无头扬声器控制 iPhone 媒体播放的方法。
我已经使用以下教程成功设置了 pi: Raspbian Stretch 上的 Headless A2DP 音频流 ,现在我正在寻找一种方法来控制我的树莓派中音频流的播放。
我一直在研究 MediaTransport1、MediaPlayer1、MediaControl1,但不幸的是我没有成功。
给你几个我已经执行的试验和错误的例子:
为了:
dbus-send --system --print-reply --dest=org.bluez /org/bluez/hci0/dev_C8_85_50_B1_C8_6B org.bluez.MediaPlayer1.Pause
我收到了:
Error org.freedesktop.DBus.Error.UnknownMethod: Method "Pause" with signature "" on interface "org.bluez.MediaPlayer1" doesn't exist
为了
qdbus --system org.bluez /org/bluez/hci0/dev_C8_85_50_B1_C8_6B/fd0 org.freedesktop.DBus.Properties.Set org.bluez.MediaTransport1 Volume 127
我收到了
Error: org.freedesktop.DBus.Error.InvalidSignature
Invalid signature for 'Volume'
此外,我发现了一个播放器,我认为我可以用它来构建我自己的脚本作为示例 ,但我遇到了一个错误:
pi@raspberrypi:~/blueutils $ python simpleplayer.py
Available commands:
PropertiesChanged(interface, properties)
help(cmd)
Use python syntax to pass arguments to available methods.
E.g.: PropertiesChanged({'Metadata' : {'Title': 'My title', 'Album': 'my album' }})
>>> <Interface <ProxyObject wrapping <dbus._dbus.SystemBus (system) at 0xb61968d0> :1.13 /org/bluez/hci0 at 0xb619db70> implementing 'org.bluez.Media1' at 0xb619dc50>
Traceback (most recent call last):
File "simpleplayer.py", line 197, in <module>
media.RegisterPlayer(dbus.ObjectPath(path), player.properties)
File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 70, in __call__
return self._proxy_method(*args, **keywords)
File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
**keywords)
File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
message, timeout)
dbus.exceptions.DBusException: org.bluez.Error.NotSupported: Operation is not supported
当我反省时
dbus-send --system --print-reply --dest=org.bluez /org/bluez/hci0 org.freedesktop.DBus.Introspectable.Introspect
我明白他的:
<node>
<interface name="org.freedesktop.DBus.Introspectable">
<method name="Introspect">
<arg name="xml" type="s" direction="out"/>
</method>
</interface>
<interface name="org.bluez.Adapter1">
<method name="StartDiscovery"></method>
<method name="SetDiscoveryFilter">
<arg name="properties" type="a{sv}" direction="in"/>
</method>
<method name="StopDiscovery"></method>
<method name="RemoveDevice">
<arg name="device" type="o" direction="in"/>
</method>
<property name="Address" type="s" access="read"></property>
<property name="Name" type="s" access="read"></property>
<property name="Alias" type="s" access="readwrite"></property>
<property name="Class" type="u" access="read"></property>
<property name="Powered" type="b" access="readwrite"></property>
<property name="Discoverable" type="b" access="readwrite"></property>
<property name="DiscoverableTimeout" type="u" access="readwrite"></property>]
<property name="Pairable" type="b" access="readwrite"></property>
<property name="PairableTimeout" type="u" access="readwrite"></property>
<property name="Discovering" type="b" access="read"></property>
<property name="UUIDs" type="as" access="read"></property>
<property name="Modalias" type="s" access="read"></property>
</interface>
<interface name="org.freedesktop.DBus.Properties">
<method name="Get">
<arg name="interface" type="s" direction="in"/>
<arg name="name" type="s" direction="in"/>
<arg name="value" type="v" direction="out"/>
</method>
<method name="Set">
<arg name="interface" type="s" direction="in"/>
<arg name="name" type="s" direction="in"/>
<arg name="value" type="v" direction="in"/>
</method>
<method name="GetAll">
<arg name="interface" type="s" direction="in"/>
<arg name="properties" type="a{sv}" direction="out"/>
</method>
<signal name="PropertiesChanged">
<arg name="interface" type="s"/>
<arg name="changed_properties" type="a{sv}"/>
<arg name="invalidated_properties" type="as"/>
</signal>
</interface>
<interface name="org.bluez.GattManager1">
<method name="RegisterApplication">
<arg name="application" type="o" direction="in"/>
<arg name="options" type="a{sv}" direction="in"/>
</method>
<method name="UnregisterApplication">
<arg name="application" type="o" direction="in"/>
</method>
</interface>
<interface name="org.bluez.Media1">
<method name="RegisterEndpoint">
<arg name="endpoint" type="o" direction="in"/>
<arg name="properties" type="a{sv}" direction="in"/>
</method>
<method name="UnregisterEndpoint">
<arg name="endpoint" type="o" direction="in"/>
</method>
<method name="RegisterPlayer">
<arg name="player" type="o" direction="in"/>
<arg name="properties" type="a{sv}" direction="in"/>
</method>
<method name="UnregisterPlayer">
<arg name="player" type="o" direction="in"/>
</method>
</interface>
<node name="dev_40_9C_28_07_63_DD"/>
<node name="dev_C8_85_50_B1_C8_6B"/>
</node>
谁能帮我解决这个问题,或者有人知道使用树莓派控制手机上音乐播放的程序吗?
问候。
更新 1:非常感谢@Parthiban,因为它运行良好。
此外,我不得不说我按照此处的教程将 bluez 版本重新安装到 5.50:在 Raspberry Pi 上安装 bluez,因为我看不到 /playerX(在我的情况下为 0)。在我编译源代码之前,我做了一些额外的工作(不确定它是否相关,但它没有伤害),我添加了.auto_connect = true
所示的 avrcp 配置文件:
希望这可以帮助每个可能面临我的问题的人