youtube-dl/youtube_dl/postprocessor/__init__.py

from .atomicparsley import AtomicParsleyPP
from .ffmpeg import (
    FFmpegAudioFixPP,
    FFmpegMergerPP,
    FFmpegMetadataPP,
    FFmpegVideoConvertor,
    FFmpegExtractAudioPP,
    FFmpegEmbedSubtitlePP,
)
from .xattrpp import XAttrMetadataPP

__all__ = [
    'AtomicParsleyPP',
    'FFmpegAudioFixPP',
    'FFmpegMergerPP',
    'FFmpegMetadataPP',
    'FFmpegVideoConvertor',
    'FFmpegExtractAudioPP',
    'FFmpegEmbedSubtitlePP',
    'XAttrMetadataPP',
]