{
    "writesubtitles": true,
    "subtitleslangs": [
        "en",
        "-live_chat"
    ],
    "subtitlesformat": "ass/srt/best",
    "postprocessors": [
        {
            "key": "FFmpegEmbedSubtitle"
        }
    ],
    "format": "bv*[vcodec~='^((he|a)vc|h26[45])']+ba[ext=m4a]/b[vcodec~='^((he|a)vc|h26[45])'] / bv*+ba/b",
    "merge_output_format": "mkv"
}