Sending "elapsed duration" (progress) of track

[gAlleb]

Hello,

I've got a function which gives me source.on_metadata track duration and writes it to file. Then i fetch it and show in browser alongside playing track at the moment.

ignore(file.write(data="#{null.get(default=0.0, request.duration(m['filename']))}", append=false, "/metadata_time.php"))

I would like somehow to send progress of the track to file, for example every second. I could use this

thread.run(every=.1, fun()-> begin ignore(file.write(data="#{source.elapsed(mysource)} / #{source.duration(mysource)}", append=false, "/metadata_time.php")) end) 

And It works if I have only one source/playlist. But I have different sources which are changing though out a day, therefore I will get only increasing numbers (if i use final source).

Is there a way to send changing progress of current track duration (something like non-existing request.elapsed(m['filename']) or source.elapsed on a ['filename']) ? :) What I am looking for is to show progress in a browser (like azuracast does it) but without azuracast :)

Thank you! I'm still learning and help will be very appreciated!

p.s. thread.run(every=.1, fun()-> begin — always assuming that it is not the function which begins, but just fun, pure fun :))

[vitoyucepi]

Hi @gAlleb,
There are several ways to do that

1. Create an http.harbor in liquidsoap and serve your statistics in JSON format or Prometheus style.
   Execute an HTTP request from your PHP script to the liquidsoap and serve the desired from the database.
   Generally, this is a pull style.
2. Execute an HTTP request on the liquidsoap side using http.get or http.post.
   Receive requests from liquidsoap using PHP or whatever you prefer and put everything into the database.
   This is a push style.
3. Push data, but use process.run.

[gAlleb]

Thanks @vitoyucepi !

I am aware of the above ways. However my initial question is different (or I didn't understand your answer:) :

thread.run(every=.1, fun()-> begin ignore(file.write(data="#{source.elapsed(mysource)} / #{source.duration(mysource)}", append=false, "/metadata_time.php")) end) 

...works correctly if I have only one source/playlist. But if I have a few sources which are changing though out a day (main source which divides into night and day, which have their own programs and switches through out a day respectively) and end up in the final source — I am getting constantly increasing numbers when function is used on the final source.

e.g. after starting the script first track (duration is 4:50) fires away and countdown begins: 00:01 / 4:50, 00:02 / 4:50...,...4:49 / 4:50 then track changes but numbers keep going. If second track duration is 5:00 then I will get: 4:51 / 9:50, 4:52 / 9:50, 4:53 / 9:50 and so on. It happens when I use "#{source.elapsed(mysource)} / #{source.duration(mysource)}" on final source but if I use it on initial playlist then everything is counted and refreshed correctly.

And my final source consists of several ones like:

#DAYSHIFT
dayshift = rotate(weights = [1, 5],[jingle, rockplaylist])
dayshift = switch([ (predicate.once({7h-7h10}), sevenam),({true}, dayshift)])
dayshift = fallback([ switch([
({ 1w16h-1w17h15 or 2w12h-2w13h15 }, onealbum),
({ 2w16h-2w17h15 or 3w12h-3w13h15 }, onealbum_2),
({ 3w16h-3w17h15 or 4w12h-4w13h15 }, onealbum_3),
({ 4w16h-4w17h15 or 5w12h-5w13h15 }, onealbum_4),
({ 5w16h-5w17h15 or 1w12h-1w13h15 }, onealbum_5),
({ 14h-15h30 }, birp),
#({ 1w11h-1w12h or 2w11h-2w12h or 3w11h-3w12h or 4w11h-4w12h or 5w11h-5w12h or 6w11h-6w12h or 7w11h-7w12h}, classichour),
]), dayshift])
#NIGHTSHIFT
nightshift = switch([({ 22h-1h }, birp), ({ 1h-6h }, lofi), ({ 6h-7h }, night)])
nightshift = switch([ (predicate.at_most(2,{22h00-22h14}), nightjingle), ({true}, nightshift) ])
nightshift = switch([(predicate.once({30m-45m}), nightjingle),({true}, nightshift)])
#nightshift = rotate(weights = [1, 5],[nightjingle, nightshift])
#
radio = switch([({ 7h-22h }, dayshift), ({ 22h-7h }, nightshift)])
radio = crossfade(smart = false, fade_out=3.00, fade_in=0.00, duration=3.00, radio)
radio = fallback([radio, darksecurity])

When I use "#{source.elapsed(mysource)} / #{source.duration(mysource)}" on the above rockplaylist source - everything is ok, everything is counted and refreshed correctly. When i use it on radio source — the "increasing numbers pattern" happens.

So I am asking Is there a way to send changing progress of current track duration (something like non-existing request.elapsed(m['filename']) or source.elapsed on a ['filename'] or inject the initial first source into source.elapsed(mysource) every time it is on) because "#{source.elapsed(mysource)} / #{source.duration(mysource)}" works in a bizarre way when it is used on a final source (when you have many switches and different playlists before the final source)

And

Thanks @vitoyucepi again for metadata.cover;)

[vitoyucepi]

I may not understand your script properly, or there may be a bug somewhere elsewhere.
Let's start with the script

a = mksafe(playlist("music", mode="normal"))
def print_source_info(s)
    elapsed = source.elapsed(s)
    remaining = source.remaining(s)
    duration = source.duration(s)
    id = source.id(s)
    print("id=#{id} elapsed=#{elapsed} remaining=#{remaining} duration=#{duration}")
end
thread.run({print_source_info(a)}, every=2.)
output.dummy(a)

It will print

id=mksafe elapsed=1.96 remaining=8.11206349206 duration=10.0720634921
id=mksafe elapsed=3.96 remaining=6.11206349206 duration=10.0720634921
id=mksafe elapsed=5.96 remaining=4.11206349206 duration=10.0720634921
id=mksafe elapsed=7.96 remaining=2.11206349206 duration=10.0720634921
id=mksafe elapsed=9.96 remaining=0.106099773243 duration=10.0660997732
id=mksafe elapsed=1.96 remaining=8.11206349206 duration=10.0720634921
id=mksafe elapsed=3.96 remaining=6.11206349206 duration=10.0720634921
id=mksafe elapsed=5.96 remaining=4.11206349206 duration=10.0720634921
id=mksafe elapsed=7.96 remaining=2.11206349206 duration=10.0720634921
id=mksafe elapsed=9.96 remaining=0.106099773243 duration=10.0660997732

I think this is expected behavior because my tracks are made using the command
for i in $(seq 1 9);do ffmpeg -f lavfi -i 'sine=frequency=3000:duration=10' -c:a libmp3lame -b:a 128k "$i.mp3"; done

Could you attach this print_source_info function to your sources?

[gAlleb]

I've attached to the final source (radio). Current switch is birp - 14:00 - 15:30

#DAYSHIFT
dayshift = rotate(weights = [1, 5],[jingle, rockplaylist])
dayshift = switch([ (predicate.once({7h-7h10}), sevenam),({true}, dayshift)])
dayshift = fallback([ switch([
({ 1w16h-1w17h15 or 2w12h-2w13h15 }, onealbum),
({ 2w16h-2w17h15 or 3w12h-3w13h15 }, onealbum_2),
({ 3w16h-3w17h15 or 4w12h-4w13h15 }, onealbum_3),
({ 4w16h-4w17h15 or 5w12h-5w13h15 }, onealbum_4),
({ 5w16h-5w17h15 or 1w12h-1w13h15 }, onealbum_5),
({ 14h-15h30 }, birp),
#({ 1w11h-1w12h or 2w11h-2w12h or 3w11h-3w12h or 4w11h-4w12h or 5w11h-5w12h or 6w11h-6w12h or 7w11h-7w12h}, classichour),
]), dayshift])
#NIGHTSHIFT
nightshift = switch([({ 22h-1h }, birp), ({ 1h-6h }, lofi), ({ 6h-7h }, night)])
nightshift = switch([ (predicate.at_most(2,{22h00-22h14}), nightjingle), ({true}, nightshift) ])
nightshift = switch([(predicate.once({30m-45m}), nightjingle),({true}, nightshift)])
#nightshift = rotate(weights = [1, 5],[nightjingle, nightshift])
#
radio = switch([({ 7h-22h }, dayshift), ({ 22h-7h }, nightshift)])
radio = crossfade(smart = false, fade_out=3.00, fade_in=0.00, duration=3.00, radio)
radio = fallback([radio, darksecurity])

And this bizarre thing happens. If I attach it to birp playlist then everything is gonna be ok. But now (attached to main radio source) this happens:

id=switch.23 elapsed=00m:00s remaining=00m:15s duration=00m:15s
id=switch.23 elapsed=00m:15s remaining=01m:40s duration=01m:56s
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id=switch.23 elapsed=06m:45s remaining=02m:04s duration=08m:50s
id=switch.23 elapsed=06m:47s remaining=02m:02s duration=08m:50s
id=switch.23 elapsed=06m:49s remaining=02m:00s duration=08m:50s
id=switch.23 elapsed=06m:51s remaining=01m:58s duration=08m:50s
id=switch.23 elapsed=06m:53s remaining=01m:56s duration=08m:50s
id=switch.23 elapsed=06m:55s remaining=01m:54s duration=08m:50s
id=switch.23 elapsed=06m:57s remaining=01m:52s duration=08m:50s
id=switch.23 elapsed=06m:59s remaining=01m:50s duration=08m:50s
id=switch.23 elapsed=07m:01s remaining=01m:48s duration=08m:50s
id=switch.23 elapsed=07m:03s remaining=01m:46s duration=08m:50s
id=switch.23 elapsed=07m:05s remaining=01m:44s duration=08m:50s
id=switch.23 elapsed=07m:07s remaining=01m:42s duration=08m:50s
id=switch.23 elapsed=07m:09s remaining=01m:40s duration=08m:50s
id=switch.23 elapsed=07m:11s remaining=01m:38s duration=08m:50s
id=switch.23 elapsed=07m:13s remaining=01m:36s duration=08m:50s
id=switch.23 elapsed=07m:15s remaining=01m:34s duration=08m:50s
id=switch.23 elapsed=07m:17s remaining=01m:32s duration=08m:50s
id=switch.23 elapsed=07m:19s remaining=01m:30s duration=08m:50s

The pattern continues 00:01 / 4:50, 00:02 / 4:50...,...4:49 / 4:50 then track changes but numbers keep going. If second track duration is 5:00 then I will get: 4:51 / 9:50, 4:52 / 9:50, 4:53 / 9:50 and so on.

[vitoyucepi]

As far as I remember, add-based operators never behave well; crossfade is one of them.

radio1 = switch([({ 7h-22h }, dayshift), ({ 22h-7h }, nightshift)], id="switch_radio1")
radio2 = crossfade(smart = false, fade_out=3.00, fade_in=0.00, duration=3.00, radio1, id="crossfade_radio2")
thread.run({print_source_info(radio1)}, every=5.)
thread.run({print_source_info(radio2)}, every=5.)

[gAlleb]

here is attached to current birp source. Everything is correct:

id=switch.11 elapsed=03m:07s remaining=00m:17s duration=03m:25s
id=switch.11 elapsed=03m:09s remaining=00m:15s duration=03m:25s
id=switch.11 elapsed=03m:11s remaining=00m:13s duration=03m:25s
id=switch.11 elapsed=03m:13s remaining=00m:11s duration=03m:25s
id=switch.11 elapsed=03m:15s remaining=00m:09s duration=03m:25s
id=switch.11 elapsed=03m:17s remaining=00m:07s duration=03m:25s
id=switch.11 elapsed=03m:19s remaining=00m:05s duration=03m:25s
id=switch.11 elapsed=03m:21s remaining=00m:03s duration=03m:25s
id=switch.11 elapsed=03m:23s remaining=00m:01s duration=03m:25s
id=switch.11 elapsed=03m:25s remaining=00m:00s duration=03m:25s
track changed
id=switch.11 elapsed=00m:03s remaining=02m:47s duration=02m:50s
id=switch.11 elapsed=00m:07s remaining=02m:42s duration=02m:50s
id=switch.11 elapsed=00m:09s remaining=02m:40s duration=02m:50s
id=switch.11 elapsed=00m:11s remaining=02m:38s duration=02m:50s
id=switch.11 elapsed=00m:13s remaining=02m:36s duration=02m:50s
id=switch.11 elapsed=00m:15s remaining=02m:34s duration=02m:50s
id=switch.11 elapsed=00m:17s remaining=02m:32s duration=02m:50s
id=switch.11 elapsed=00m:19s remaining=02m:30s duration=02m:50s

As far as I remember, add-based operators never behave well; crossfade is one of them.

radio1 = switch([({ 7h-22h }, dayshift), ({ 22h-7h }, nightshift)], id="switch_radio1")
radio2 = crossfade(smart = false, fade_out=3.00, fade_in=0.00, duration=3.00, radio1, id="crossfade_radio2")
thread.run({print_source_info(radio1)}, every=5.)
thread.run({print_source_info(radio2)}, every=5.)

So what could you suggest?

[gAlleb]

I got it, checking...

[vitoyucepi]

1. Don't use anything after crossfade as a source of time data.
2. Fill up an issue.

[gAlleb]

id=switch.23 elapsed=02m:46s remaining=00m:24s duration=03m:11s
id=switch_radio1 elapsed=02m:49s remaining=00m:24s duration=03m:14s
id=switch_radio1 elapsed=02m:54s remaining=00m:19s duration=03m:14s
id=switch.23 elapsed=02m:51s remaining=00m:19s duration=03m:11s
id=switch_radio1 elapsed=02m:59s remaining=00m:14s duration=03m:14s
id=switch.23 elapsed=02m:56s remaining=00m:14s duration=03m:11s
id=switch_radio1 elapsed=03m:04s remaining=00m:09s duration=03m:14s
id=switch.23 elapsed=03m:01s remaining=00m:09s duration=03m:11s
id=switch_radio1 elapsed=03m:09s remaining=00m:04s duration=03m:14s
id=switch.23 elapsed=03m:06s remaining=00m:04s duration=03m:11s
id=switch.23 elapsed=03m:11s remaining=00m:00s duration=03m:11s
id=switch_radio1 elapsed=03m:14s remaining=00m:00s duration=03m:14s

ta-dam

id=switch.23 elapsed=03m:16s remaining=02m:50s duration=06m:06s
id=switch_radio1 elapsed=00m:08s remaining=02m:50s duration=02m:58s
id=switch.23 elapsed=03m:21s remaining=02m:45s duration=06m:06s
id=switch_radio1 elapsed=00m:13s remaining=02m:45s duration=02m:58s
id=switch_radio1 elapsed=00m:18s remaining=02m:40s duration=02m:58s
id=switch.23 elapsed=03m:26s remaining=02m:40s duration=06m:06s
id=switch_radio1 elapsed=00m:23s remaining=02m:35s duration=02m:58s
id=switch.23 elapsed=03m:31s remaining=02m:35s duration=06m:06s
id=switch_radio1 elapsed=00m:28s remaining=02m:30s duration=02m:58s
id=switch.23 elapsed=03m:36s remaining=02m:30s duration=06m:06s
id=switch_radio1 elapsed=00m:33s remaining=02m:25s duration=02m:58s
id=switch.23 elapsed=03m:41s remaining=02m:25s duration=06m:06s
id=switch_radio1 elapsed=00m:38s remaining=02m:20s duration=02m:58s
id=switch.23 elapsed=03m:46s remaining=02m:20s duration=06m:06s
id=switch_radio1 elapsed=00m:43s remaining=02m:15s duration=02m:58s
id=switch.23 elapsed=03m:51s remaining=02m:15s duration=06m:06s
id=switch_radio1 elapsed=00m:48s remaining=02m:10s duration=02m:58s
id=switch.23 elapsed=03m:56s remaining=02m:10s duration=06m:06s
id=switch.23 elapsed=04m:01s remaining=02m:05s duration=06m:06s
id=switch_radio1 elapsed=00m:53s remaining=02m:05s duration=02m:58s
id=switch_radio1 elapsed=00m:58s remaining=02m:00s duration=02m:58s
id=switch.23 elapsed=04m:06s remaining=02m:00s duration=06m:06s
id=switch.23 elapsed=04m:11s remaining=01m:55s duration=06m:06s
id=switch_radio1 elapsed=01m:03s remaining=01m:55s duration=02m:58s
id=switch.23 elapsed=04m:16s remaining=01m:50s duration=06m:06s
id=switch_radio1 elapsed=01m:08s remaining=01m:50s duration=02m:58s
id=switch_radio1 elapsed=01m:13s remaining=01m:45s duration=02m:58s
id=switch.23 elapsed=04m:21s remaining=01m:45s duration=06m:06s
id=switch.23 elapsed=04m:26s remaining=01m:40s duration=06m:06s
id=switch_radio1 elapsed=01m:18s remaining=01m:40s duration=02m:58s
id=switch_radio1 elapsed=01m:23s remaining=01m:35s duration=02m:58s
id=switch.23 elapsed=04m:31s remaining=01m:35s duration=06m:06s
id=switch_radio1 elapsed=01m:28s remaining=01m:30s duration=02m:58s
id=switch.23 elapsed=04m:36s remaining=01m:30s duration=06m:06s
id=switch.23 elapsed=04m:41s remaining=01m:25s duration=06m:06s
id=switch_radio1 elapsed=01m:33s remaining=01m:25s duration=02m:58s
id=switch_radio1 elapsed=01m:38s remaining=01m:20s duration=02m:58s
id=switch.23 elapsed=04m:46s remaining=01m:20s duration=06m:06s
id=switch.23 elapsed=04m:51s remaining=01m:15s duration=06m:06s
id=switch_radio1 elapsed=01m:43s remaining=01m:15s duration=02m:58s
id=switch_radio1 elapsed=01m:48s remaining=01m:10s duration=02m:58s
id=switch.23 elapsed=04m:56s remaining=01m:10s duration=06m:06s
id=switch_radio1 elapsed=01m:53s remaining=01m:05s duration=02m:58s
id=switch.23 elapsed=05m:01s remaining=01m:05s duration=06m:06s
id=switch.23 elapsed=05m:06s remaining=01m:00s duration=06m:06s
id=switch_radio1 elapsed=01m:58s remaining=01m:00s duration=02m:58s
id=switch.23 elapsed=05m:11s remaining=00m:55s duration=06m:06s
id=switch_radio1 elapsed=02m:03s remaining=00m:55s duration=02m:58s
id=switch.23 elapsed=05m:16s remaining=00m:50s duration=06m:06s
id=switch_radio1 elapsed=02m:08s remaining=00m:50s duration=02m:58s
id=switch.23 elapsed=05m:21s remaining=00m:45s duration=06m:06s
id=switch_radio1 elapsed=02m:13s remaining=00m:45s duration=02m:58s
id=switch_radio1 elapsed=02m:18s remaining=00m:40s duration=02m:58s
id=switch.23 elapsed=05m:26s remaining=00m:40s duration=06m:06s
id=switch.23 elapsed=05m:31s remaining=00m:35s duration=06m:06s
id=switch_radio1 elapsed=02m:23s remaining=00m:35s duration=02m:58s
id=switch_radio1 elapsed=02m:28s remaining=00m:30s duration=02m:58s
id=switch.23 elapsed=05m:36s remaining=00m:30s duration=06m:06s
id=switch_radio1 elapsed=02m:33s remaining=00m:24s duration=02m:58s
id=switch.23 elapsed=05m:41s remaining=00m:24s duration=06m:06s
id=switch_radio1 elapsed=02m:38s remaining=00m:19s duration=02m:58s
id=switch.23 elapsed=05m:46s remaining=00m:19s duration=06m:06s
id=switch_radio1 elapsed=02m:43s remaining=00m:14s duration=02m:58s
id=switch.23 elapsed=05m:51s remaining=00m:14s duration=06m:06s
id=switch.23 elapsed=05m:56s remaining=00m:09s duration=06m:06s
id=switch_radio1 elapsed=02m:48s remaining=00m:09s duration=02m:58s

@vitoyucepi it is genius!)

Thank you so much))