取流时将 fnval 设为 16，但 API 返回了 MP4 格式的结果？

[NingmengLemon]

URL: https://api.bilibili.com/x/player/wbi/playurl?bvid=BV1ZW41147ER&cid=32796730&fnval=16&fourk=1&wts=1701947961&w_rid=c4380c6a2f78023a3b507ce3399e1f87 返回的结果：

{
	"code": 0,
	"message": "0",
	"ttl": 1,
	"data": {
		"from": "local",
		"result": "suee",
		"message": "",
		"quality": 16,
		"format": "mp4",
		"timelength": 120024,
		"accept_format": "mp4",
		"accept_description": ["流畅 360P"],
		"accept_quality": [16],
		"video_codecid": 7,
		"seek_param": "start",
		"seek_type": "second",
		"durl": [{
			"order": 1,
			"length": 120024,
			"size": 6346024,
			"ahead": "",
			"vhead": "",
			"url": "https://upos-sz-mirrorcos.bilivideo.com/upgcxcode/30/67/32796730/32796730-1-16.mp4?e=ig8euxZM2rNcNbRVhwdVhwdlhWdVhwdVhoNvNC8BqJIzNbfqXBvEqxTEto8BTrNvN0GvT90W5JZMkX_YN0MvXg8gNEV4NC8xNEV4N03eN0B5tZlqNxTEto8BTrNvNeZVuJ10Kj_g2UB02J0mN0B5tZlqNCNEto8BTrNvNC7MTX502C8f2jmMQJ6mqF2fka1mqx6gqj0eN0B599M=&uipk=5&nbs=1&deadline=1701956003&gen=playurlv2&os=cosbv&oi=1879737000&trid=dca5e911f5f740c98ab8725a46e8c45au&mid=208878706&platform=pc&upsig=ae21a15ee0ddccba8227372e03deef14&uparams=e,uipk,nbs,deadline,gen,os,oi,trid,mid,platform&bvc=vod&nettype=0&orderid=0,3&buvid=&build=0&f=u_0_0&agrr=0&bw=52883&logo=80000000",
			"backup_url": ["https://upos-sz-mirrorcos.bilivideo.com/upgcxcode/30/67/32796730/32796730-1-16.mp4?e=ig8euxZM2rNcNbRVhwdVhwdlhWdVhwdVhoNvNC8BqJIzNbfqXBvEqxTEto8BTrNvN0GvT90W5JZMkX_YN0MvXg8gNEV4NC8xNEV4N03eN0B5tZlqNxTEto8BTrNvNeZVuJ10Kj_g2UB02J0mN0B5tZlqNCNEto8BTrNvNC7MTX502C8f2jmMQJ6mqF2fka1mqx6gqj0eN0B599M=&uipk=5&nbs=1&deadline=1701956003&gen=playurlv2&os=cosbv&oi=1879737000&trid=dca5e911f5f740c98ab8725a46e8c45au&mid=208878706&platform=pc&upsig=ae21a15ee0ddccba8227372e03deef14&uparams=e,uipk,nbs,deadline,gen,os,oi,trid,mid,platform&bvc=vod&nettype=0&orderid=1,3&buvid=&build=0&f=u_0_0&agrr=0&bw=52883&logo=40000000", "https://upos-sz-mirrorcosb.bilivideo.com/upgcxcode/30/67/32796730/32796730-1-16.mp4?e=ig8euxZM2rNcNbRVhwdVhwdlhWdVhwdVhoNvNC8BqJIzNbfqXBvEqxTEto8BTrNvN0GvT90W5JZMkX_YN0MvXg8gNEV4NC8xNEV4N03eN0B5tZlqNxTEto8BTrNvNeZVuJ10Kj_g2UB02J0mN0B5tZlqNCNEto8BTrNvNC7MTX502C8f2jmMQJ6mqF2fka1mqx6gqj0eN0B599M=&uipk=5&nbs=1&deadline=1701956003&gen=playurlv2&os=cosbbv&oi=1879737000&trid=dca5e911f5f740c98ab8725a46e8c45au&mid=208878706&platform=pc&upsig=5b9563f26eaad3ecb0d36a6bddbfb88c&uparams=e,uipk,nbs,deadline,gen,os,oi,trid,mid,platform&bvc=vod&nettype=0&orderid=2,3&buvid=&build=0&f=u_0_0&agrr=0&bw=52883&logo=40000000"]
		}],
		"support_formats": [{
			"quality": 16,
			"format": "mp4",
			"new_description": "360P 流畅",
			"display_desc": "360P",
			"superscript": "",
			"codecs": null
		}],
		"high_format": null,
		"last_play_time": 0,
		"last_play_cid": 32796730
	}
}

视频应该是 【mylist复制】LamazeP（ラマーズP） 的第21P？同时这个视频下面还有多个分P存在相同问题……
更换为原来的 API https://api.bilibili.com/x/player/playurl?bvid=BV1ZW41147ER&cid=32796730&fnval=16&fourk=1 之后问题仍然存在
但是同样的操作其他视频就没有问题（吗？） cookies 应该是正常的，因为之前取流了好多视频都正常
我想知道你们取流这个视频时是否也有这个问题

以及这是否是我的打开方式有问题 :(