Recipe C — Podcast episode from an article URL

Outcome: A manifest.json referencing a narrated MP3 + cover art image, both generated from a single article URL passed on the command line.

Approx cost: ~$0.11 per episode.

Script

copy#!/bin/bash
set -euo pipefail

ARTICLE_URL="$1"
REF_VOICE_URL="${REF_VOICE_URL:?set REF_VOICE_URL to a public mp3/wav voice sample to narrate in}"

# 1. Pull the article + summarize into a podcast script
curl -sL "$ARTICLE_URL" \
  | visa-cli run-llm --json --yes - \
      --system 'You are converting a web article into a 2-minute podcast script. Return strict JSON: {"title":"...","script":"...","soundbites":["...","..."]}.' \
  | jq -r '.text' > script.json

TITLE=$(jq -r '.title' < script.json)
SCRIPT_TEXT=$(jq -r '.script' < script.json)

# 2. Narrate the script in your reference voice
AUDIO=$(echo "$SCRIPT_TEXT" \
    | visa-cli generate speech --json --yes - \
        --ref-audio-url "$REF_VOICE_URL" \
    | jq -r '.urls[0] // .filePath')

# 3. Cover art derived from the title
COVER=$(visa-cli generate image "podcast cover art for: $TITLE, 1:1, bold typography" --json --yes \
    | jq -r '.urls[0] // .filePath')

# 4. Manifest
jq -n --arg title "$TITLE" --arg audio "$AUDIO" --arg cover "$COVER" \
  '{title:$title,audio:$audio,cover:$cover}' > manifest.json

echo "Episode bundled: $(cat manifest.json | jq -c .)"

Cost breakdown