未明确定义识别变量的Liquidsap



好吧,我已经拔头发好几个小时了

Liquidsoap对我不起作用,我知道这应该起作用,因为有一个明显的错误。。。

set("log.file",false)
set("log.stdout",true)
set("log.level",3)
podcasts = playlist("/home/user/icecast/ham.txt")
# This function turns a fallible
# source into an infallible source
# by playing a static single when
# the original song is not available
def my_safe(radio) =
  # We assume that festival is installed and
  # functional in liquidsoap
  security = single("say:Hello, we are currently having some technical difficulties but we'll be back soon so stay tuned!")
  # We return a fallback where the original
  # source has priority over the security
  # single. We set track_sensitive to false
  # to return immediately to the original source
  # when it becomes available again.
  fallback(track_sensitive=false,[radio, security])
end
radio= podcasts
radio= my_safe(podcasts)
# A function that contains all the output
# we want to create with the final stream
def outputs(s) =
  # First, we partially apply output.icecast
  # with common parameters. The resulting function
  # is stored in a new definition of output.icecast,
  # but this could be my_icecast or anything.
  output.icecast = output.icecast(host="localhost", password="foobar")
  # An output in mp3 to the "live" mountpoint:
  output.icecast(%mp3, mount="live",radio)
end

和错误

At line 23, character 6: The variable radio defined here is not used anywhere
  in its scope. Use ignore(...) instead of radio = ... if you meant
  to not use it. Otherwise, this may be a typo or a sign that your script
  does not do what you intend.

如果有人也可以解决另一个问题,我有

我想找到如何将两个源运行到两个独立的装入点

set("log.file",false)
set("log.stdout",true)
set("log.level",3)
podcasts = playlist("/home/user/icecast/ham.txt")
songlist = playlist("/home/user/icecast/otherplaylist.txt")
# This function turns a fallible
# source into an infallible source
# by playing a static single when
# the original song is not available
def my_safe(radio) =
  # We assume that festival is installed and
  # functional in liquidsoap
  security = single("say:Hello, we are currently having some technical difficulties but we'll be back soon so stay tuned!")
  # We return a fallback where the original
  # source has priority over the security
  # single. We set track_sensitive to false
  # to return immediately to the original source
  # when it becomes available again.
  fallback(track_sensitive=false,[radio, security])
end
radio= podcasts
radio= my_safe(podcasts)
def my_safe(songlist) =
  # We assume that festival is installed and
  # functional in liquidsoap
  security = single("say:Hello, we are currently having some technical difficulties but we'll be back soon so stay tuned!")
  # We return a fallback where the original
  # source has priority over the security
  # single. We set track_sensitive to false
  # to return immediately to the original source
  # when it becomes available again.
  fallback(track_sensitive=false,[songlist, security])
end
moarradio= songlist
moarradio= my_safe(songlist)
# A function that contains all the output
# we want to create with the final stream
def outputs(s) =
  # First, we partially apply output.icecast
  # with common parameters. The resulting function
  # is stored in a new definition of output.icecast,
  # but this could be my_icecast or anything.
  output.icecast = output.icecast(host="localhost", password="foobar")
  # An output in mp3 to the "live" mountpoint:
  output.icecast(%mp3, mount="live",radio)
  output.icecast(%mp3, mount="otherlive",moarmusic)
end

我得到了同样的错误,但它告诉我第二个变量没有使用(moarradio)

liquidsoap配置文件基本上是一个脚本,这意味着它将从上到下运行。

在读取配置文件时,它抱怨您没有使用radio变量定义的行23,原因是您使用的是一个定义的行24。与许多其他语言不同,liquidsoap脚本中没有赋值,只有定义

除此之外,您似乎不了解全局变量和局部变量之间的区别,以及它们各自的作用域。

您正在声明一个my_safe函数,该函数接受一个参数。在函数的范围内,请使用其名称引用参数。然后用全局变量作为参数调用my_safe函数,您所期望的事情就会实际发生。

如果不调用outputs函数,您的源将不会被注册。只需删除函数构造即可。

以下是我如何改写你的第二个例子:

set("log.file",false)
set("log.stdout",true)
set("log.level",3)
podcasts = playlist("/home/user/icecast/ham.txt")
songlist = playlist("/home/user/icecast/otherplaylist.txt")
# This function turns a fallible
# source into an infallible source
# by playing a static single when
# the original song is not available
def my_safe(stream) =                          # <- used a different variable name here
  # We assume that festival is installed and
  # functional in liquidsoap
  security = single("say:Hello, we are currently having some technical difficulties but we'll be back soon so stay tuned!")
  # We return a fallback where the original
  # source has priority over the security
  # single. We set track_sensitive to false
  # to return immediately to the original source
  # when it becomes available again.
  fallback(track_sensitive=false,[stream, security])  # <- used a different variable name here
end
radio= my_safe(podcasts) # <- fix here
# <- got rid of redeclaration of my_safe
moarradio= my_safe(songlist) # <- fix here
# <- got rid of function construct
# First, we partially apply output.icecast
# with common parameters. The resulting function
# is stored in a new definition of output.icecast,
# but this could be my_icecast or anything.
output.icecast = output.icecast(host="localhost", password="foobar")
# An output in mp3 to the "live" mountpoint:
output.icecast(%mp3, mount="live",radio)
output.icecast(%mp3, mount="otherlive",moarradio)  # <- fix here

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