How to get `mpv --stream-record` to use icecast title as file name?

Question

Is it possible to get mpv to dump a stream to separate files based on the current icy-title value when using --stream-record with an icecast stream?

man mpv only mentions using a fixed file name with --record-file, --stream-record --dump-cache.

If this is not possible directly with mpv what might be a possible approach to save separate files for each song in an icecast playlist rather than one huge continuous file as --stream-record=mystream.mp3 does?

Answer 1

While a solution is probably possible with a custom mpv lua script extension, apparently downloading to custom file names is not supported ootb.

A dedicated utility that can parse icecast titles and dump the streams to separate files is 🔗streamripper. It can be installed with apt install streamripper on debian linuces or brew install streamripper on mac.

The following command will create separate files named after stream titles:

streamripper http://some-icast-server.com/stream -r 8888

The -r flag will create a relay server on port 8888. You can listen to the relayed stream while it's been downloading with:

mpv http://localhost:8888

Answer 2

I am currently writing a python script that can do exactly that.

I will in a few days give you the repo address to check it out, it is an internet radio client, that can also record the selected stream.

Here is a very very reducted version, that shows the principle of the whole procedure:

import mpv
import time

def title0(player):
 tit1 = player.metadata.get('icy-title')
 tit2 = player.metadata.get('title')
 tit3 = player.metadata.get('TITLE')
 tit4 = player.metadata.get('artist')
 tit5 = player.metadata.get('ARTIST')
 if tit1 == None:
  tit1 = ""
 if tit2 == None:
  tit2 = ""
 if tit3 == None:
  tit3 = ""
 if tit4 == None:
  tit4 = ""
 if tit5 == None:
  tit5 = ""
 if tit4 == "" and tit5 == "":
  pavla = ""
 else:
  pavla = " - "
 tit0 = tit1+tit2+tit3+pavla+tit4+tit5
 if tit0 == '':
  tit0 = "Not Available"
 return tit0

player = mpv.MPV()
player.play('https://laterna.kafeneio.social/public/kafeneio')
player.wait_for_playback()
tit0 = "Not Available"
while tit0 == "Not Available":
 try:
  fil_format = player.file_format
  tit0 = title0(player).replace("-", " ")
  fil_nam = tit0+'.'+fil_format
 except:
  time.sleep(1)
player.stream_record = fil_nam
time.sleep(30)

This script will save a file with the correct format and the 'icy-title' name in the same directory as your py script.