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import copy
def get_format(format: str, quality: str) -> str:
"""
Returns format for download
Args:
format (str): format selected
quality (str): quality selected
Raises:
Exception: unknown quality, unknown format
Returns:
dl_format: Formatted download string
"""
format = format or "any"
if format.startswith("custom:"):
return format[7:]
if format == "thumbnail":
# Quality is irrelevant in this case since we skip the download
return "bestaudio/best"
if format == "mp3":
# Audio quality needs to be set post-download, set in opts
return "bestaudio/best"
if format in ("mp4", "any"):
if quality == "audio":
return "bestaudio/best"
# video {res} {vfmt} + audio {afmt} {res} {vfmt}
vfmt, afmt = ("[ext=mp4]", "[ext=m4a]") if format == "mp4" else ("", "")
vres = f"[height<={quality}]" if quality != "best" else ""
vcombo = vres + vfmt
return f"bestvideo{vcombo}+bestaudio{afmt}/best{vcombo}"
raise Exception(f"Unkown format {format}")
def get_opts(format: str, quality: str, ytdl_opts: dict) -> dict:
"""
Returns extra download options
Mostly postprocessing options
Args:
format (str): format selected
quality (str): quality of format selected (needed for some formats)
ytdl_opts (dict): current options selected
Returns:
ytdl_opts: Extra options
"""
opts = copy.deepcopy(ytdl_opts)
if "postprocessors" not in opts:
opts["postprocessors"] = []
if format == "mp3":
opts["postprocessors"].append({
"key": "FFmpegExtractAudio",
"preferredcodec": "mp3",
"preferredquality": 0 if quality == "best" else quality,
})
opts["writethumbnail"] = True
opts["postprocessors"].append({"key": "FFmpegMetadata"})
opts["postprocessors"].append({"key": "EmbedThumbnail"})
if format == "thumbnail":
opts["skip_download"] = True
opts["writethumbnail"] = True
opts["postprocessors"].append({"key": "FFmpegThumbnailsConvertor", "format": "jpg", "when": "before_dl"})
return opts
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