Jivedrop 🪩

Drop your podcast .wav into a shiny MP3, AAC, or Opus with metadata, cover art, and all

The Groove

Jivedrop takes your mixed podcast audio (WAV/FLAC) and outputs RSS-ready podcast files with optimised encoding, embedded artwork, and complete metadata. Choose MP3 for universal compatibility, AAC for Apple-recommended quality, or Opus for modern Android and web delivery. One command, distribution-ready output.

Example Output

What's Cooking

• 🎵 Multi-format output via --format mp3|aac|opus (default: mp3)
  • 🎸 MP3 CBR 112kbps mono / 192kbps stereo, 44.1kHz, LAME quality 3, 20.5kHz lowpass
  • 🍏 AAC CBR 64kbps mono / 128kbps stereo, 44.1kHz, .m4a (Apple-recommended)
  • 🔊 Opus VBR ~32kbps mono / ~48kbps stereo, 48kHz, .opus (Android/web)
• 🏷️ Format-native metadata - correct tags for each container
  • MP3: ID3v2.4 tags with embedded cover art
  • AAC: iTunes MP4 atoms with embedded cover art
  • Opus: Vorbis comments (text tags; no embedded cover)
  • Episode title, number, album, artist, date, comment
  • Podcast enclosure stats for duration and bytes
• ♊ Dual-mode workflow
  • 📝 Hugo mode read metadata from episode markdown
  • 🎙️ Standalone mode specify metadata via flags
• 🚀 Single binary Just drop and encode
  • 🐧 Linux (amd64 and aarch64)
  • 🍏 macOS (x86 and Apple Silicon)

Usage

Hugo Mode (Integrated Workflow)

For podcasts using Hugo static site generator and the something like Castanet, Jivedrop reads metadata from episode markdown:

Hugo mode automatically:

• Reads episode title and number from frontmatter
• Locates cover art from episode_image field
• Applies Linux Matters defaults (artist, album, comment)
• Outputs frontmatter-ready values for podcast_duration and podcast_bytes
• Prompts to update Hugo frontmatter

# Basic encoding (MP3 by default)
jivedrop LMP67.flac episode/67.md

# Encode as AAC for Apple-recommended distribution
jivedrop LMP67.flac episode/67.md --format aac

# Override Hugo defaults
jivedrop LMP67.flac episode/67.md --artist "Ubuntu Podcast" --comment "https://ubuntupodcast.org"

Standalone Mode (Universal Workflow)

Standalone mode features:

• Required flags: --title, --num, and --cover
• Optional metadata: --artist, --album, --date, --comment, --format
• Smart filename generation: {artist}-{num}.{ext} or episode-{num}.{ext}
• Album defaults to artist value if not specified

For podcasts without Hugo, specify metadata via flags:

# Minimal (title, episode number, and cover art required)
jivedrop audio.flac \
  --title "Terminal Full of Sparkles" \
  --num 66 \
  --cover artwork.png

# Encode as Opus (note: Opus is not accepted by Apple Podcasts)
jivedrop audio.flac \
  --title "Terminal Full of Sparkles" \
  --num 66 \
  --cover artwork.png \
  --format opus

# Full metadata
jivedrop audio.flac \
  --title "Terminal Full of Sparkles" \
  --num 66 \
  --artist "Linux Matters" \
  --album "All Seasons" \
  --date "2025-10" \
  --comment "https://linuxmatters.sh/66" \
  --cover artwork.png \
  --format aac

CLI Reference

Usage:
  Hugo mode:
    jivedrop <audio-file> <episode-md> [flags]
  Standalone mode:
    jivedrop <audio-file> --title TEXT --num NUMBER --cover PATH [flags]


Arguments:
  [<audio-file>]  Path to audio file (WAV, FLAC)
  [<episode-md>]  Path to episode markdown file (Hugo mode)


Flags:
  -h, --help     Show context-sensitive help.
  --num          Episode number, must be a non-negative integer (required in standalone mode)
  --title        Episode title (required in standalone mode)
  --artist       Artist name (defaults to 'Linux Matters' in Hugo mode)
  --album        Album name (defaults to artist value if omitted)
  --date         Release date (YYYY-MM-DD format)
  --comment      Comment URL (defaults to 'https://linuxmatters.sh' in Hugo mode)
  --cover        Cover art path (required in standalone mode)
  --output-path  Output file or directory path
  --format       Output format: mp3, aac, or opus (default: "mp3")
  --stereo       Encode as stereo at 192kbps (default: mono at 112kbps)
  --version      Show version information

Output

• Hugo mode: LMP{num}.{ext} (or {artist}-{num}.{ext} with --artist override)
• Standalone mode: {artist}-{num}.{ext} (or episode-{num}.{ext} without --artist)

Where {ext} is .mp3, .m4a, or .opus depending on --format.

Encoding settings

Format	Mono	Stereo	Sample rate	Notes
MP3 (default)	112 kbps CBR	192 kbps CBR	44.1 kHz	LAME quality 3, 20.5 kHz lowpass
AAC	64 kbps CBR	128 kbps CBR	44.1 kHz	AAC-LC, .m4a (ipod muxer), no lowpass
Opus	~32 kbps VBR	~48 kbps VBR	48 kHz	libopus, .opus, no lowpass; 48 kHz is Opus's native rate

Metadata tags

Tags are written natively by the muxer for each format.

MP3: ID3v2.4

• TIT2: {num}: {title}
• TALB: {album} (omitted if not provided)
• TRCK: {num}
• TPE1: {artist} (omitted if not provided)
• TDRC: {date} (defaults to current YYYY-MM)
• COMM: {comment} (omitted if not provided)
• APIC: Cover art (PNG, front cover)

AAC: iTunes MP4 atoms

Same fields as MP3, written as MP4 atoms. Cover art embedded.

Opus: Vorbis comments

Same text fields as MP3. Cover art is not embedded in Opus files.

Build

Jivedrop uses ffmpeg-statigo for FFmpeg static bindings.

# Setup or update ffmpeg-statigo submodule and library
just setup

# Build and test
just build        # Build binary
just test         # Run tests
just test-encoder # Test encoder

Why Jivedrop?

FFmpeg's CLI can absolutely encode podcast-ready audio with metadata. But getting the incantation right for CBR encoding, mono downmix, format-native tags, embedded artwork, and correct lowpass filtering requires a sprawling command line you'll never remember. Switch from MP3 to AAC and every option changes. Add Hugo frontmatter parsing on top and you're writing a script.

Jivedrop wraps the fiddly bits into a single binary that speaks Hugo natively. Drop your WAV, point at your episode markdown, pick your format, and get distribution-ready output with duration and byte counts ready to paste back into your frontmatter.