Downloading m4s segments AND generated subtitles from video player?

25th Oct 2022 08:15 #1

Member

I am trying to acquire the following video https://www.bilibili.com/video/BV1714y1775U/

The video is served via m4s segments, I was able to ID a segment from this URL in the network tab.

https://upos-hz-mirrorakam.akamaized.net/upgcxcode/13/98/857349813/857349813-1-100023....&logo=80000000

When I try to rip the source URL or the m4s segment URL in streamlink or ffmpeg, they both fail. Is there some way to use ffmpeg or streamlink to rip this complete video?
Otherwise what would be the best way to get all the segments?

ALSO: How can I rip the subtitles that come with the video player into a nice SRT file? They are classified as "AIsubtitle"... I have never heard of this

They get served in segments just like the m4s segments. Here is a sample URL for the subtitle segment
https://i0.hdslb.com/bfs/ai_subtitle/prod/773942620857430081ec2973ecd4d3d3b8114d94386860e29f

The JSON response from the subtitle segment
Code:
	
font_size	0.4
font_color	"#FFFFFF"
background_alpha	0.5
background_color	"#9C27B0"
Stroke	"none"
type	"AIsubtitle"
lang	"zh"
version	"ja-t1.0.c"
body	[…]
"body" contains the actual subtitle structure which looks something like this but nested in the above sample
Code:
0	
from	16.05
to	17.4
sid	1
location	2
content	"非常感谢您的光临"
1	
from	17.55
to	20.07
sid	2
location	2
content	"我希望你能愉快地送上你。"
2	
from	20.13
to	21.93
sid	3
location	2
content	"交给阿科的先生"
...
I am not really sure how to proceed on this aside manually waiting for new segments and downloading them, then manually joining them.

Some insight on this would be appreciated, thank you for reading