Here is my first basic script

I have a more detail crossfade ,normalization and news schedule but its not ready for consumption.

This works faithfully for me.

# original code commented out
# default = amplify(id="silence_src", 0.00001, noise())

# Music

myplaylist     = playlist(mode="random",reload=3600,"/srv/path - to /music")

# Some jingles
jingles = playlist(reload=3600,"/srv/path - to /jingles")

# If something goes wrong, we'll play this which is infallable so must be a valid audio file
security = single("/srv/path - to /drops/intro.mp3")


# for the stationID, we'll play this which is infallable so must be a valid audio file
stationID = single("/srv/path - to /path - to /stationID.mp3")

# Start building the feed with music
default = myplaylist


# Use the smart crossfader to transition between tracks using fade in and out of 0.5 seconds
 default = smart_crossfade(fade_out=0.5,fade_in=0.5,default)

# Add in the jingles using a random with a 1:1 weight and set the delay to 1. which means we should never get two consecutive jingles
 default = random(weights = [1, 1], [delay(1.,jingles), default])


# And the StationID on TOH
default = add([default, switch([({0m0s},stationID)])])

#

# When blank/silence is detected of -28dB for more than 15 seconds then skip track/advance to next track and if some goes wrong 
#play the station intro
default = strip_blank(threshold=-28.,max_blank=15.,default)

default = fallback(track_sensitive = false, [default, security])


#This may work but above better
#default = fallback(track_sensitive=false, [ strip_blank(threshold=-28.,max_blank=15.,default) , security])
#
#

# I kept everything below so that I can make Airtime do metatags
# original code not commented out

ref_off_air_meta = ref off_air_meta
if !ref_off_air_meta == "" then
    ref_off_air_meta := "Airtime - offline"
end

 default = rewrite_metadata([("title", !ref_off_air_meta)], default)
 ignore(output.dummy(default, fallible=true))

The reasons for using this is so varied and many.Each Station has it own way of scheduling but here are senarios
        The main concept is to create playlists  when noting is schedule

1. A station which have say talk show  7 - 10 am the rest of the time it is music,you might not find it feasible to go to the calendar and do a schedule or to have just the same songs through rotation.-This Gives one method of creating a folder with (music,jingles,etc),using an ftp client you can change the collection easily.
2. Rather than dead Air as # default = amplify(id="silence_src", 0.00001, noise()) - which is just a low noise when silence occur
3. How I use it is that I have one show at 11:30pm - 6am on a radio station,the rest of the time I do not want to be programming dynamic blocks - I just create one hour shows.If the main staion has problem they use my server as redundancy and can upload there own   contents
4. I just have fun tampering with liquidsoap,after all its open source I want to extend the limits where none has gone before
   
   default
   = amplify(id="silence_src", 0.00001, noise()) - See more at:
   http://forum.sourcefabric.org/discussion/15650/airtime-2-4-and-backups-playlists-give-yours?post#Form_Body

:)) =))

Can samba shares be included as a playlist?
well last evening,I experiment with samba and found a worthy solution.
you could use  smb       = playlist(reload=600, "smb://myserver/mp3/playlist")

where reload allows how often your playlist is refresh by liquidsoap
and 600 is the number of seconds/intervals (600s=10minutes)

use a greater refresh depend on your playlist 1sec will put greater load on cpu 3600 (hourly) is a better starting.

I modify my code above to include modes and reloads

This will be great for setting my watch folder as samba shares

I will further elaborate on how this will be benefical for you by splitting your playlist in different genre

I am writing this off my head because I am preparing for my live show tonight at 11.15pm EST.
but I think you miss two things in making a fallback source and a fall back file should something go wrong.

I think this should work but I have not tested it yet.

commented out:
#default = amplify(id="silence_src", 0.00001, noise())
# put this exactly below
# fallback source:
security = single("/path/to/my/file")
# your backup stream
default = input.http("http://localhost:9000/rastafrau")
# Fallback from playlist to live:
# No track_sensitivity here since we do not want to cut the
# begining of the live show... !
default = fallback(track_sensitive=false,[default,security])
# then the information Airtime use to determine wether off line or not-cannot remember now
.
.
.
#Leave these so airtime can write back the meta data (optional)
default = rewrite_metadata([("title", !ref_off_air_meta)], default)
ignore(output.dummy(default, fallible=true))

removed by me ,see below for modifications and explanation

PRE { font-family: "Liberation Serif",serif; }P { margin-bottom: 0.08in; }

This is a  full fall-over script for silence, it make use of

    Creating various playlist (news,jingles,music,voxpop,sweepers etc.)
    It clarifies fallible and infallible source using mksafe
    use time switch events and also time events to play over current playing audio
    it uses Airtime fallback
    This script gives full explanation of each steps


#^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^Start Of Modification^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

#********************************Build Some Playlist***********************************************************

# Music

yourplaylist     = playlist("/somepathto/music")

# Some jingles
jingles     = playlist("/somepathto/jingles/")

# here is a way to have reloads and random play,not use though
#yourplaylist     = playlist(mode="random",reload=300,"/somepathto/music")
#jingles = playlist(mode="random",reload=3600,"/somepathto/jingles")

# News Weather and Sport
news = playlist(reload=3600,"/somepathto/news")

#News of the week
newsoftheweek = playlist(reload=3600,"/somepathto/newsoftheweek")

# some public announcements
public= playlist(reload=3600,"/somepathto/public")


# for the station ID, we'll play this
stationID = single("/somepathto/stationid.mp3")

# for some sweepers
sweeper = single("/somepathto/sweepers.mp3")

# If something goes wrong, we'll play this,I will use a schedule
#security = single("/somepathto/station.mp3")



#*********Start building the feed with music***********************************************

# Start building the feed with music by assigning to the same clock (variables)
# I am not using single letter but words for clarity
# make your playlist be infallible using mksafe,we say that a source is infallible
# if it is always available.
#an output requires that its input source is infallible, otherwise it complains
# that “That source is fallible!

yourmusicbackup = mksafe(yourplaylist)

jinglesplay = mksafe(jingles)


#********************Process The Music**************************************************

# When blank/silence is detected of -28dB for more than 3 seconds
# then skip track/advance to next track
yourmusicbackup = strip_blank(threshold=-28.,max_blank=15.,yourmusicbackup)


#*********************Create Some Schedule Event***************************************

# using this type of scheduling by naming it a seperate variable will make fall back 
#stop the music then
# play what event is schedule then continue play the music again best used for
# news,voxpop,public announcement
#  delay (1.,variable) allows only one of variable to play from a playlist,and 
#now back to back like station id
# use single instead for best result 


schedule=
         add([
               switch([
                        ({ 0m00s },delay(1.,stationID)),
                        ({ 05m00s},news),
                        ({ 10m00s},public),
                        ({ 15m00s},delay(1.,stationID)),
                        ({ 25m00s},public),
                        ({ 30m00s},delay(1.,stationID)),
                        ({ 32m00s},news),  
                        ({ 35m00s},public),
                        ({ 45m00s},delay(1.,stationID)),
                        ({ 45m40s},public),
                        ({ 55m00s }, newsoftheweek),
                     ])
           ])


 

#*****************Feed with music******************************************************

# And now to play the back up music and if a something changes
# some tutorial call this variable "radio"
# to avoid confusion I will call this  "atpointofchange"

 atpointofchange = random (weights = [1,4],[jinglesplay,yourmusicbackup])


#If you use something like this yourplaylist = playlist(mode="random",reload=300,"/somepathto/music") 
#In building your playlist above then use atpointofchange to rotate is more desirable like below
#atpointofchange = rotate(weights = [1,4],[jinglesplay,yourmusicbackup])


 #****************************Put on some sweepers to play over current audio**************************

#another type of switch is to add something like a sweeper that will play
# over the current music or audio
#you can creates times as above to your suit like a sweeper every 20 minutes 
#and then switch back

atpointofchange = add([atpointofchange, switch([({20m00s},sweeper)])])

#*************************Do Your Processing here unless you have a big playlist for non schedule event**

#Based on @Albert FR wonderful tips 
#
#Do not use this its accounted for in Airtime and liquidsoap

# yourmusicbackup = airtime_crossfade(fade_out=0.5,fade_in=0.5,yourmusicbackup)

#the point of this section is for you to know where to do the processing,i will adopt this  later in a more 
#comprehensive example which will mimic your dbx ,muticomm or autocomm compressor which can switch
# to say a jingle  or sweeper when there is no sound from say a live input
# the Idea is for you to able to expand this script 

 #*****************Fallback to schedule with music******************************************

# Fall back for Music track_sensitive=false,because we want 
#the music pause/stop then  play the schedule and start again


default = fallback(track_sensitive = false,[schedule,atpointofchange])


#^^^^^^^^^^^^^^^^^^^^End Of Modification^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^



follow my tutorial 101 for other explanations
http://forum.sourcefabric.org/discussion/15701/fallover-101-how-to-make-all-scripts-worked-easy-steps-to-build-your-scripts-fixed-silence
 

you are so right @Albert FR.

Both Airtime and Liquidsoap have an inbuilt crossfade.Airtime on the other hand allows you to tweak this in the web-interface at System ===> Preference.

Love this Tip.

Another two tips I found out is

•  That if your put crossfades before you feed the music you might get the desired results.It will even merge the jingles and songs,so put it after the feed and before the fallback like this
  
• If you use the playlist that already have mode=random,then you get a better flow if at the time feed then you can do a rotate 

I made these changes as suggested by @Albert FR and Others

#Based on @Albert FR wonderful tips
#do this instead so you can control it from the Airtime system perference and place it before fallback
yourmusicbackup = airtime_crossfade(fade_out=0.5,fade_in=0.5,yourmusicbackup)


#If you use something like this yourplaylist = playlist(mode="random",reload=300,"/somepathto/music")
#In building your playlist above then use atpointofchange to rotate is more desirable like below
#atpointofchange = rotate (weights = [1,4],[jinglesplay,yourmusicbackup])

Thanks @Albert FR

@voisses tech:   Are you sure that your script above works?
When I try to use it, I'm getting:

Starting Liquidsoap Playout Engine: At line 190, character 21: The variable yourmusicbackup defined here
  is not used anywhere in its scope. Use ignore(...) instead of
  yourmusicbackup = ... 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.

@Bart,
Yes it works,if you get an undefined variable it means that you are using  something that is only mention once.
I cannot tell from this  tutorial were is Line 190 so here is the two things that define yourmusicbackup

yourmusicbackup=mksafe(yourplaylist)  #so its define here,make sure it matches

# basically you are just  turning
#yourmusicbackup=mksafe(playlist("/somepathto/music"))
#The function mksafe takes a source and returns an infallible source,

Can you tell me what is at your line 190

do
sudo cp /usr/lib/airtime/pypo/bin/liquidsoap_scripts/ls_script.liq  ~Desktop/ls_script.liq
sudo chmod 777 ~Desktop/ls_script.liq
open with your text editor and give me  line 190

I hope @bart will make sure the

atpointofchange = random (weights = [1,4],[jinglesplay,yourmusicbackup])

is used once,the red highlights is commented out.

The trick about liquidsoap is that it runs line by line so if "yourmusicbackup"

is run in the first line when it runs to the next it will tell you what is wrong

Voisses Tech said:

I will post the exact script I use on two station and also the link to my test station later

can we listen to this? which stations are these?

WITHOUT airtime_crossfade it is working now. If I use the airtime_crossfade, I'm getting:  "Starting Liquidsoap Playout Engine: At line 193, char 40: the variable airtime_crossfade used here has not been
  previously defined",

This is the line "yourmusicbackup = airtime_crossfade(fade_out=0.5,fade_in=0.5,yourmusicbackup)', and there is nowhere another 'airtime_crossfade' variable.
If I replace that by smart_crossfade,then I have the "The variable yourmusicbackup defined here
  is not used anywhere in its scope" error message.
So it's the crossfade line which is causing my a headache.

@bart

you are very right ,I made that test and found that line to be the culprit.

I had used smart_fade on my test machine but made a change on the fly without re-test.I have commented out that line  as its not really needed.,since both liquidsoap (utils.liq) and airtime ( i do not put the liq here because i do not people go messing with it used system pereference) have their own built in crossfade.

If you have adopt this code you will definitely see the sweet change over(crossfade) when your news etc comes up as schedule. 

@bart

if you have not figured out the TOH question you asked on august 2 ,here is the answer

yes you can do so much with a TOH
      ({ 0m00s },delay(1.,stationID)),
means a station ID right on exactly Top of the Hour system clock
If your station ID is 20s then you just make your next schedule interval ({ 0m20s }

What I do if I have say a staion id that is 45s long and I have the time check(like the time is 6pm) and a jingle of 45s,
 
I place the time check(like the time is 6pm) in the calendar at 6.00 as soon as that is finished Airtime fall back to default so now your fall back runs playing the station ID just After

I break my minutes to be

({ 0m10s },stationId)),
({ 0m45s },jingle)),

The idea of putting time checks in the calendar is you can have 12 "say time" like 1 o clock,2o'clock etc......With link-show do it for one day and repeat continuosly

the trick is

 if you want it to stop the music and do it thing(play off course)

 place it in this variable for schedule

schedule= add([
               switch([
                        ({ 0m00s },delay(1.,stationID)),
                        ({ 05m00s},news),
                        ({ 10m00s},public),
                        ({ 15m00s},delay(1.,stationID)),
                        ({ 25m00s},public),
                        ({ 30m00s},delay(1.,stationID)),
                        ({ 32m00s},news),
                        ({ 35m00s},public),
                        ({ 45m00s},delay(1.,stationID)),
                        ({ 45m40s},public),
                        ({ 55m00s }, newsoftheweek),
                     ])
                 ])

If you want it to play over the music just do it like the sweepers example(the sweeper example use an existing variable) ,you might want to amplify it if you do this

Albert, I'm using your script. But I noticed the stream cuts out every once in a while. But the stream does not cut out if using the master source. I didn't notice things cutting out either when a playlist was scheduled. 

@Nolan Wagner

you stated that you are using Albert's Script but you mention 2 other things that are unrelated.

First the Master and Next fallback.

The script are designed to deal with a period when you have nothing schedule and Airtime goes to "dead air"

The Master is one of the way of doing a live show and pass it through Airtime

Fall back is best describe here under how does it work liquidsoap documentation

Nolan Wagner said:

Albert, I'm using your script. But I noticed the stream cuts out every once in a while. But the stream

Are you referring to when you schedule?

Albert FR said:

A little example of ls_script.liq modification

Search this line (and comment it) :

#default = amplify(id="silence_src", 0.00001, noise())

#yours jingles repository
promotions = playlist ("/srv/users/jingles/")

# your backup playlist
musics = playlist(mode='randomize',reload=1,reload_mode="rounds", "/srv/users/music/")

# a jingle every 4 songs
default = rotate(weights=[1,4], [promotions, musics])

ref_off_air_meta = ref off_air_meta
if !ref_off_air_meta == "" then
    ref_off_air_meta := "Airtime - offline"
end


#default = rewrite_metadata([("title", !ref_off_air_meta)], default)
ignore(output.dummy(default, fallible=true))

Are you using this script?

Kindly note if you put files in the any directory you must make them readable
by
chmod 775 ..........

If you do  use this script above at the end of 4 songs it will go to dead air
This is because there is no fallback

you would have to have additional line for the fall back  like this

#yours jingles repository
promotions = playlist ("/srv/users/jingles/")

# your backup playlist
musics = playlist(mode='randomize',reload=1,reload_mode="rounds", "/srv/users/music/")

# a jingle every 4 songs
#default = rotate(weights=[1,4], [promotions, musics])
#how I want my fall back-new line
playthisatfallback= rotate(weights=[1,4], [promotions, musics])

#fall back to music-New line need
default = fallback(track_sensitive = false, [ promotions,playthisatfallback])

I am not testing this but you have to add a fall back for it to work

and while that may seem the correct option.if you do that if 10 cuts is in your promotionscart(jingles) when the first 1:4 weights occur,the system will move to default and play those 10 cuts the next time.
One easy way around this is set a single file that will play then move back to playthisatfallback.
so this is the correct last line

security=single("/srv/users/security/security.mp3")
#fall back to music-New line need
default = fallback(track_sensitive = false, [ security,playthisatfallback])


 

If you still have the the problem dump the logs and post them in this thread as state in this troubleshoot procedure

http://forum.sourcefabric.org/discussion/15654/airtime-troubleshoot-for-dummies-like-me-basic-things-you-can-do-to-see-under-the-hood


You can listen  here with a this playback playback system is up from 1am-11am [0100-1100]Tuesday - friday EST. and 1am-2:30pm[0100-1430] Sundays.EST.

remember your dump log will contained user name and pass so you can untar and remove,then tar and submit


This system,speak time (TOH),play news,play jingles,playstation ID,play a sweeper at various time.

I noticed this in the logs for liquidsoap: 

Ok, I am a little confused

Is the streams disconnecting from icecast?
Or is it that you see the information in the log above.

The client you see connecting and disconnecting is the relationship between liquidsoap and airtime
Liquidsoap has an internal clock to check things between 0 sec and 10 sec.

So all it is doing is the main liq  checking if every thing is ok with airtime(client) and if all is okay it moves to the instruction in another liq

Liquidsoap even pool/queue carts 10 sec before it actually prepared them to play.

So if you have this problem with stream disconnection

1. dump your logs according to my troubleshooting guide in this forum
2. Please prepare your songs according to the manual
3. Make sure you upgrade to 2.4
4. Give me your icecast logs as above
   

 

oops true
I should have asked to post the script,yeah,I need to knuckle my head.Thanks @Albert Fr.

@ Nolan Wagner

Can you edit your posts here by placing the script you have .

Copy your problem you have listed in this thread to a text editor and re-paste in a new Thread.

thanks
Voisses

hoerich said:

My hack did only work until 2.3.1 I've had a few.
I use foobar2000 for Daily- & Weekly- SmartPlaylist-Shuffling and rebroadcasting BBCWS via Satellite & physical Line-In-Function and stream this via BUTT/m3w to Airtimes Icecast-Server.
And this Stream was my fallback!

commented out:
default = amplify(id="silence_src", 0.00001, noise())
default = rewrite_metadata([("title", !ref_off_air_meta)], default)
ignore(output.dummy(default, fallible=true))

filled in before "ref_off_air_meta = ref off_air_meta":
default = input.http("http://localhost:9000/rastafrau")

Since this ain't working anymore I use the ShowSource-Function as a workaround.
Sadly, I don't have time right now to trial&error these things until late august.

I successfully tested to fallback to Line-In today on my testing station.

commented out:
default = amplify(id="silence_src", 0.00001, noise())
default = rewrite_metadata([("title", !ref_off_air_meta)], default)
ignore(output.dummy(default, fallible=true))

filled in before "ref_off_air_meta = ref off_air_meta":
default = input.alsa()

This would give me the ability to change my technical workflow a little bit.
Hopefully it also works on x64...

I could use the fallback-function as Live-Studio-Line-Input.
So I try a new workflow this week to just leave Live-Studio shows empty.

hoerich said:

I successfully tested to fallback to Line-In today on my testing station.

commented out:
default = amplify(id="silence_src", 0.00001, noise())
default = rewrite_metadata([("title", !ref_off_air_meta)], default)
ignore(output.dummy(default, fallible=true))

filled in before "ref_off_air_meta = ref off_air_meta":
default = input.alsa()

This would give me the ability to change my technical workflow a little bit.
Hopefully it also works on x64...

I could use the fallback-function as Live-Studio-Line-Input.
So I try a new workflow this week to just leave Live-Studio shows empty.

I yelled to soon!
We do use ALSA-Output at our Radio Station and this breaks this tweak.
It leads in heavy glitches while scheduled webstreams are broadcasted.
Scheduled Files are broadcasted fine

I had to undo this change and will test further. damnit ;-)

Voisses Tech said:

I will search for a script I had tested and give you and Idea later this week.

can't wait for it.

I did another successful try on fallback to ALSA-Input on my teststation today.

My goal is to change ls_script.liq to be able to use audio from Soundcard-Line-In for Live-Studio-Situation.

I added/uncommented following lines:

Uncomment/Delete:
Line 152:
#default = amplify(id="silence_src", 0.00001, noise())
Line158 & 159:
#default = rewrite_metadata([("title", !ref_off_air_meta)], default)
#ignore(output.dummy(default, fallible=true))

Add:

Line 7:
set("frame.size",3120)

Line 153 (after #default = amplify(id="silence_src", 0.00001, noise()) ):
default = input.alsa(bufferize = true)

Framesize depends on used soundcard. So this has to be customized system-specific.
see infos here at bottom of page http://savonet.sourceforge.net/doc-svn/cookbook.html

If this works, I can leave shows empty in Airtime-Calender to switch to Live-Studio-Input.
I hope this doesn't only work on my test-station. I will report.

Voisses Tech said:

@hoerich
I have posted the script I have been using for sometime now here http://forum.sourcefabric.org/discussion/15904/input-mic-and-mixer-using-alsa-something-that-will-work-using-airtime-script-modified


did you try

input.alsa()

This is the default

then if you are going to use buffersize = true,thats the default also you can increase the buffer to a value

I think it can take float or boolean
If you want to see the latency problem take an out from TV,DVD,or any video and putthrough your input and you will see it

V.O.I.S.S.E.S
Can You hear Me now

I did try input.alsa() and it worked.
But I want to address more specific, because I got 5 stereo-Ins and try to use 3 of them in future.
So I tried input.alsa(device=dsp_chain1) or input.alsa(device="hw:0,0) or input.alsa(device='hw=0,0)
I saw so many different expressions of this value.

But let's continue this talk here =>