Incorrect decoding of subtitles embedded in manifest

[pkosmala]

Description

Special characters in subtitles are not displayed correctly resulting in å being shown as Ã¥.

Steps to reproduce

1. Load up video src with a manifest that has embedded subtitles. Example contents can be found below:

#EXTM3U
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="Dansk",DEFAULT=NO,AUTOSELECT=NO,FORCED=NO,URI="https://domain.com/mu/subtitles/playlist/urn:dr:mu:manifest:5b5d29c66187a5106075a3f1?segmentsizeinms=60000&subtitleType=HardOfHearing",LANGUAGE="da"
#EXT-X-STREAM-INF:SUBTITLES="subs",PROGRAM-ID=1,BANDWIDTH=278000,RESOLUTION=640x360,CODECS="avc1.66.30, mp4a.40.2"
https://domain.com/i/all/clear/streaming/f1/5b5d29c66187a5106075a3f1/U--1-8-_04abf6ac510945d580a5253de8a3af5b_,281,434,714,1550,2215,.mp4.csmil/index_0_av.m3u8?null=0

2. Player follows the link to load a list of subtitle chunks:

#EXTM3U
#EXT-X-TARGETDURATION:60
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-PLAYLIST-TYPE:VOD
#EXTINF:60,
https://domain.com/mu/subtitles/segment/urn:dr:mu:manifest:5b5d29c66187a5106075a3f1?segmentsizeinms=60000&index=0&subtitleType=HardOfHearing
#EXTINF:60,
https://domain.com/mu/subtitles/segment/urn:dr:mu:manifest:5b5d29c66187a5106075a3f1?segmentsizeinms=60000&index=1&subtitleType=HardOfHearing

3. And then it loads a specific WEBVTT chunk:

WEBVTT
X-TIMESTAMP-MAP=MPEGTS:900000,LOCAL:00:00:00.000
00:00:03.880 --> 00:00:08.520
I storbyerne står køberne i kø.
Det væltede ind med folk.
00:00:08.640 --> 00:00:12.720
Ejendomsmæglerne har det godt.
Syv dage, så var den løst.

Results

Expected

Subtitles are displayed without any changes like so:
Ejendomsmæglerne har det godt.
Syv dage, så var den løst.

Actual

Special characters are not shown correctly:
Ejendomsmæglerne har det godt.
Syv dage, så var den løst.

Additional Information

versions

videojs

6.9.0

browsers

IE11+

OSes

Windows

[welcome]

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[elsassph]

Extra notes: server is serving chunks with mimetype text/plain; charset=utf-8.

[mister-ben]

This was fixed a while back (see #5070), but you're using an older version of Video.js. The fix is in http-streaming as of Video.js 7.2.

[pkosmala]

Upgrading to Video.js 7.2 has fixed the issue.