I think I've figured it out:
#!/usr/local/bin/liquidsoap -t
set("log.file.path","/home/audiodef/radio/liquidradio.log")
set("log.level",4)
main_radio=mksafe(playlist(timeout=3600.,conservative=true,"http://synthetronica/radio/main_playlist";))
def append_artist(m) =
artist = m["artist"]
if artist == "" then [("artist","Synthetronica Radio")] else
[("artist","Synthetronica Radio: #{artist}")] end
end
def append_title(m) =
title = m["title"]
if title == "" then [("title","Various Artists")] else
[("title","#{title}")] end
end
main_radio = map_metadata(append_artist, main_radio)
main_radio = map_metadata(append_title, main_radio)
output.icecast(%vorbis(quality=0.6,samplerate=44100),
host="localhost", port=8000,
password="(password)", mount="radio.ogg", name="Synthetronica
Radio",
description="Eclectic Electronica", genre="Electronic",
url="synthetronica",
main_radio)
It seems to me that all I need to do now is figure out how to call an
external script from inside the defs, where the external script looks up
the currently playing file in a database and returns the artist and
title. Where do I get the currently playing file name? Is there an
m["filename"]?
Thanks,
Damien
On 06/28/12 20:47, Audiodef Online wrote:
> Thanks! I understand the logic of that code, but this made me realize I
> don't know how to make static metadata replacement work. I need to
> understand that before proceeding with hooking into external scripts.
> After spending some time looking around and experimenting, I've modified
> my script to this:
>
> #!/usr/local/bin/liquidsoap -t
>
> set("log.file.path","/home/audiodef/radio/liquidradio.log")
> set("log.level",4)
>
> main_radio=mksafe(playlist(timeout=3600.,conservative=true,"http://synthetronica/radio/main_playlist";))
>
> pattern = '$(if $(display_artist),"Synthetronica Radio","Synthetronica
> Radio: $(artist)")'
> main_radio=rewrite_metadata([("artist",pattern)],main_radio)
> pattern = '$(if $(display_title),"Various Artists","$(title)")'
> main_radio=rewrite_metadata([("title",pattern)],main_radio)
>
> output.icecast(%vorbis(quality=0.6,samplerate=44100),
> host="localhost", port=8000,
> password="(password)", mount="radio.ogg", name="Synthetronica
> Radio",
> description="Eclectic Electronica", genre="Electronic",
> url="synthetronica",
> main_radio)
>
> This works - technically. But it doesn't do what I want, because the
> fields display_artist and display_title exist for many of the tracks in
> my playlist, but are empty. How do I modify this script so that if these
> fields do not exist, or they do exist but are empty, my stream should
> say "Synthetronica Radio - Various Artists" in Audacious (or whatever
> media player)?
>
> Once I understand how to do this, I'll be ready to proceed to calling
> external scripts. I would really appreciate any help on this part.
>
> Also, is there a page documenting all of the metadata fields? The only
> reason I know about display_artist and display_title is because it was
> in an example in the documentation. I haven't found these anywhere else,
> so I'm hoping I simply did not know where to look.
>
> Thanks!
> Damien
>
>
>
> On 06/27/12 23:46, [email protected] wrote:
>> If it's any help, I use the following to get the value of the current
>> title from
>> a database entry (where 'title.txt' is a returned value):
>>
>>
>> elsif m["filename"] ==
>> "/usr/local/www/rcr/radio/current/special/mp3/today-special-mp3-32.pls" then
>>
>> content = list.hd(get_process_lines("cat
>> /usr/local/www/rcr/radio/current/special/mp3/title.txt"))
>> ("title", "Special Program - #{content}")
>>
>> Hth
>>
>>
>> On Wed, 27 Jun 2012 17:10:16 -0400, Audiodef Online
>> <[email protected]> wrote:
>>
>>> Thanks, Martin.
>>>
>>> But I have to confess to not knowing how to use this:
>>>
>>> (string)->[string]
>>>
>>> Perform a shell call and return the list of its output lines.
>>>
>>> (unlabeled) (string)
>>>
>>> I don't need hand-holding, but I learn best from examples. Is there
>>> an example
>>> somewhere I can read to see how it actually works in practice?
>>>
>>> Thanks,
>>> Damien
>>>
>>>
>>> On 06/27/12 20:32, Martin Konečný wrote:
>>>
>>> Look up "get_process_lines" function call.
>>>
>>>
>>> http://savonet.sourceforge.net/doc-1.0.0/reference.html
>>>
>>>
>>>
>>>
>>> O Wed, Jun 27, 2012 at 4:29 PM, Audiodef Online <[email protected]>
>>> wrote:
>>>
>>> Is it possible to have a LS script execute an external script, wait for
>>> the external script to return a value, and use that value?
>>>
>>> Specifically, I would like my LS script to parse the stream's metadata.
>>> If the metadata has the literal string "unknown" (case insensitive) as
>>> the title of the track, then the LS script should execute a PHP script
>>> (via CGI, of course) and store the result of that script (which would be
>>> exactly one value - a string) and then set the metadata of the current
>>> track with the string retrieved from the PHP script.
>>>
>>> Can I do this? How would it be done?
>>>
>>> --
>>> My music: http://audiodef.com
>>> Synthetronica: http://synthetronica.com
>>> Male survivors of domestic violence: http://abusedmen.org
>>>
>>>
>>> ------------------------------------------------------------------------------
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>>> will include endpoint security, mobile security and the latest in
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>>>
>>>
>>>
>>
>
--
My music: http://audiodef.com
Synthetronica: http://synthetronica.com
Male survivors of domestic violence: http://abusedmen.org
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and
threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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