使用formats.contentLength
. formats[]
是一个数组,其中包含找到的每种格式的详细信息,例如调用 ytdl.getBasicInfo()
这是典型 JSON 响应的摘录:
`"formats": [
{
"itag": 18,
"mimeType": "video/mp4; codecs=\"avc1.42001E, mp4a.40.2\"",
"bitrate": 730250,
"width": 640,
"height": 360,
"lastModified": "1540940877707739",
"contentLength": "17340341",
"quality": "medium",
"fps": 30,
"qualityLabel": "360p",
"projectionType": "RECTANGULAR",
"averageBitrate": 729908,
"audioQuality": "AUDIO_QUALITY_LOW",
"approxDurationMs": "190055",
"audioSampleRate": "44100",
"audioChannels": 2,
"s": "QOq0AJ8wRQIgCbPrsAEt3PIyCCEET_Fcoa0B_hJSRDVqLQdD0=uH8ZkCIQCcf5m4i52WhllLYCTKzFPb97os3BCyYtJazCSyoEpHrQ=C",
"sp": "sig",
"url": "https://r2---sn-hp57kn7z.googlevideo.com/videoplayback?expire=1608282564&ei=ZB3cX9DUDsPR4QSQq76oBw&ip=0.0.0.0&id=o-AFfB7IbdqRRBTM2a3_IS5lxOxi2aCPz9i1wuj7TqTMgs&itag=18&source=youtube&requiressl=yes&mh=bz&mm=31%2C26&mn=sn-hp57kn7z%2Csn-q4fl6ns6&ms=au%2Conr&mv=m&mvi=2&pl=24&initcwndbps=278750&vprv=1&mime=video%2Fmp4&ns=Ut07FDufHwnP4p0Bs9qdDDgF&gir=yes&clen=17340341&ratebypass=yes&dur=190.055&lmt=1540940877707739&mt=1608260683&fvip=2&c=WEB&txp=5431432&n=5kzbgSygQqixfwo9g&sparams=expire%2Cei%2Cip%2Cid%2Citag%2Csource%2Crequiressl%2Cvprv%2Cmime%2Cns%2Cgir%2Cclen%2Cratebypass%2Cdur%2Clmt&lsparams=mh%2Cmm%2Cmn%2Cms%2Cmv%2Cmvi%2Cpl%2Cinitcwndbps&lsig=AG3C_xAwRgIhANdVqyHVbFSicpCXRz0qj5OXLolFEC5sup_vXuzXIkUAAiEA_RMc27U0fdbTOpNRwz9Kjaax8kRNKs1D04UCZhcPEhk%3D&sig=AOq0QJ8wRQIgCbPrsAEt3PIyCCEET_Fcoa0B_hJSRDVqLQdD0CuH8ZkCIQCcf5m4i52WhllLYCTKzFPb97os3BCyYtJazCSyoEpHrQ%3D%3D"
}
],`