zettel/c6a6cf84.md

date	tags
2021-11-29T22:45	timeline software notes

a self-hosted podcast playback station

components

hardware

• raspberry pi 3
• wired speakers

software

• raspberry pi os
  • packages:
    • python-pip
    • libglib2.0-dev
    • libxml2-dev
    • libcurl4-openssl-dev
    • libid3-3.8.3-dev
    • vim
• mopidy
  • extensions:
    • mopidy-m3u
    • mopidy-local
    • mopidy-musicbox-webclient
    • mopidy-mpd
    • mopidy-stream
• castget

general setup

1. set up headless raspbian, connect wifi, set up user acct, and podcast dir

sudo raspi-config
mkdir -p /home/pi/podcasts/{playlists,podcast1,podcast2,podcast3}

2. install mopidy + extensions (see links above for installation info)

# edit /etc/mopidy/mopidy.conf
[local]
enabled = true
media_dir = /home/pi/podcasts
scan_timeout = 10000

[file]
enabled = false

[http]
enabled = true
hostname = 0.0.0.0
port = 6680

[mpd]
enabled = true
hostname = 0.0.0.0
port = 6600

[logging]
verbosity = 1

[m3u]
enabled = true
playlists_dir = /home/pi/podcasts/playlists

3. compile and install castget (see link above for installation info)

# edit /home/pi/castgetrc

# note, the keys in this config should correspond with the podcast dirs
# created in step 1 above

[podcast1]
url=http://url.to/podcast1
spool=/home/pi/podcasts/podcast1
filename=%(date) %(title).mp3

[podcast2]
url=http://url.to/podcast2
spool=/home/pi/podcasts/podcast2
filename=%(date) %(title).mp3

...

4. create sync.sh script with the following content (ymmv, use at your own risk):

#!/usr/bin/env bash

set -e

# fetch podcasts
/usr/local/bin/castget -C /home/pi/castgetrc -1 "$1"

playlist="/home/pi/podcasts/playlists/$1.m3u"
files=(/home/pi/podcasts/$1/*.mp3)

# remove stale playlist
if [ -f "$playlist" ]
then
  rm "$playlist"
fi

# build new playlist with newest entries _first_
for (( i=${#files[@]}-1; i>=0; i-- ))
do
  fp="${files[$i]}"
  fn=$(basename -- "$fp")

  # next, we'll make these all relative fps
  quoted=$(python -c "from urllib import parse, sys; print(parse.quote(sys.argv[1]))" "$fn")
  echo "local:track:$1/$quoted" >> "$playlist"
done

sudo mopidyctl local scan

5. add cron jobs

5 * * * * /home/pi/sync.sh podcast1 >> /path/to/podcast1.log
0,15,30,45 15,16,17 * * * /home/pi/sync.sh podcast2 >> /path/to/podcast2.log
0 0 * * 5 /home/pi/sync.sh podcast3 >> /path/to/podcast3.log

6. add any additional internet radio streams into one or more playlist files in /home/pi/podcasts/playlists.
7. enjoy!