site/common.py

from subprocess import run
import csv
import json
import time

ACRONYM = "sch"

FORMATS = {
    "opus": ["-b:a", "48k"],
    "m4a": [
        "-b:a",
        "48k",
        "-f",
        "ipod",
        "-profile:a",
        "aac_he",
        "-disposition:v:0",
        "attached_pic",
    ],
    "oga": ["-b:a", "64k", "-c:a", "libvorbis"],
    "mp3": ["-b:a", "72k", "-map", "0:0", "-map", "1:0"],
}


def path_to_episode(name, format):
    if format in ["original", "txt", "md"]:
        base = "content"
    else:
        base = "static/episodes"

    if format == "original":
        format = "opus"

    return f"{base}/{name}.{format}"


def get_chapters(episode):
    with open(path_to_episode(episode, "txt")) as f:
        chapter_reader = csv.reader(f, delimiter="\t")
        for chapter in chapter_reader:
            yield {"start": float(chapter[0]), "title": chapter[2]}


def get_episode_info(name, format):
    path = path_to_episode(name, format)
    return json.loads(
        run(
            [
                "ffprobe",
                "-loglevel",
                "error",
                "-show_format",
                "-print_format",
                "json",
                path,
            ],
            capture_output=True,
        ).stdout
    )["format"]


def sexagesimal(ts):
    return time.strftime("%H:%M:%S", time.gmtime(ts)) + str(round(ts % 1, 3))[1:]