Mpv: Wish - An option to decrease volume when "icy-title" sets to a specific keyword

[maxxsch28]

mpv version and platform

mpv 0.27.2 (C) 2000-2017 mpv/MPlayer/mplayer2 projects
built on Mar 20 2018
ffmpeg library versions:
libavutil 55.78.100
libavcodec 57.107.100
libavformat 57.83.100
libswscale 4.8.100
libavfilter 6.107.100
libswresample 2.9.100
ffmpeg version: 3.4.2

Reproduction steps

Sorry for use this bug tracker to send you a wish. I use mpv to listen a streamig of the most important AM stations of Argentina (https://buecrplb01.cienradios.com.ar/Mitre790.aac).

I ran mpv on command line of opensuse Linux, and today I found that shows extra information about the station, like:

icy-title: ADSWIZZ
A: 05:27:24 / 00:00:00 Cache: 10s+145KB
File tags:
icy-title: CONTENT
A: 05:41:07 / 00dd:00:00 Cache: 10s+130KB

Then, I just think that an option to automagically decrease the volume when ici-title sets to "ADSWIZZ" would be wonderful, when the advertisements starts always the volume decrease a few points...

Thanks for everything, sorry for my english.

Expected behavior

Actual behavior

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[sfan5]

That's doable using a script.

[maxxsch28]

Do you have any kind of example?
Or a link to find it?

[CounterPillow]

Here's a real simple one that could work for you, it just sets the volume to 50% if the title is "ADSWIZZ" and otherwise sets it to 100%. Place inside ~/.config/mpv/scripts/

function check_title_and_set_vol(name, value)
    if value == "ADSWIZZ" then
        mp.set_property("volume", 50)
    else
        mp.set_property("volume", 100)
    end
end

mp.observe_property("media-title", "string", check_title_and_set_vol)

[maxxsch28]

For the record, I solve my wish thanks to @CounterPillow :+1:

function check_title_and_set_vol(name, value)
    if value == "ADSWIZZ" then
        mp.set_property("volume", 65)
    else
        mp.set_property("volume", 100)
    end
end

mp.observe_property("metadata/icy-title", "string", check_title_and_set_vol)