Download subtitles, when the language is zh-TW Chinese (Taiwan) to download, the subtitles in the srt file will be blank, only the timeline has no text records

[minimoonleaf]

Checklist

• I am able to reproduce the bug with the latest version.
• I made sure that there are no existing issues - open or closed - which I could contribute my information to.
• I have read the FAQ and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one bug.
• I have read and understood the contribution guidelines.

Affected version

0.25.1

Steps to reproduce the bug

Simple scope:
Download Youtube subtitles, when the language is zh-TW Chinese (Taiwan) to download, the subtitles in the srt file will be blank, only the timeline has no text records

srt file loaded with MX player will show file error

Detailed scope:
0.Install MX player and CX file manager
1.Install Youtube 18.05.40
2.Install ReVanced Manager 0.0.57
3.ReVanced Manager Patcher Select Youtube and Selected patches Recommended and install Youtube ReVanced
4.Install NewPipe 0.25.1
5.Open Youtube ReVanced watch https://youtu.be/mtb-qa8xvFU and download video and subtitles (language : zh-TW Chinese (Taiwan))
6.Open Video by MX player
7.MX player load Srt subtitles
8.Show error
9.Use CX file manager open subtitles can see Srt only record timeline has no text records

Bad file:
https://drive.google.com/file/d/1aY12_di6YXjE2J-3j-amguavYcXe-CbN/view?usp=sharing

Expected behavior

No error & Srt file correct.

Actual behavior

MX player load Srt error.
Open the Srt file to check the content and found that the subtitles are missing and only the timeline

Screenshots/Screen recordings

No response

Logs

No response

Affected Android/Custom ROM version

No response

Affected device model

No response

Additional information

No response

[opusforlife2]

Does this occur with all languages, a few, or only zh-TW?

[minimoonleaf]

這是否發生在所有語言、少數或僅 zh-TW 中？

I try to download Japanese, and the playback confirms that Japanese is normal, it seems that only Traditional Chinese has a problem

[Taratect]

Can confirm this problem exists on certain English font styles.
For example
https://www.youtube.com/watch?v=zbQRY8KSVbU

Try downloading the English subtitles. The timestamps are present but not the actual captions

[opusforlife2]

Something to do with bad Unicode, maybe? Or lack of support for certain glyphs?

@minimoonleaf Could you try downloading on a different device?

[Estecka]

Similar issue on both the english and japanese captions of this specific video: https://youtu.be/-eDYT_20YhM
Opening the downloaded file in a text editors reveals it contains only timestamps and no lyrics.

For the english captions in particular, they show properly in Newpipe's player. They contain some occasional accentuated characters, italicized words, and a single ❤ emoji, but that's about the extent of it. They don't seem to use any special font, color or positioning.

There's no such issue with the auto-generated captions.

Newpipe 0.27.7
Android 8.1.0
Redmi Note 5

[TransZAllen]

Hi, I’ve encountered the same issue where text is missing in the manually downloaded subtitles (*.srt), as described in this issue. Here are a few YouTube videos where this problem can be reproduced:

• https://www.youtube.com/watch?v=L-BgxLtMxh0 (Styled subtitles for YouTube demonstration)
• https://www.youtube.com/watch?v=Cc2nkx77U24 (Test: Rainbow Captions In Youtube)
• https://www.youtube.com/watch?v=lUDPjyfmJrs (【original anime MV】III【hololive/宝鐘マリン＆こぼ・かなえる】)

Is there any progress on fixing this issue? Has anyone started working on it yet? If not, I’d be happy to help test or potentially assist with a fix, as I’ve done some preliminary testing. Please let me know if more details are needed or if I can be of help in any way!
@Estecka @opusforlife2 @SameenAhnaf @Taratect

[TransZAllen]

@Estecka @opusforlife2 @SameenAhnaf @Taratect

Hello, everyone.

I’ll start working on this issue now.

Reason:

1. This issue persists in the latest version (0.28.0) and the most recent commit on the dev branch.

[TransZAllen]

這是否發生在所有語言、少數或僅 zh-TW 中？

I try to download Japanese, and the playback confirms that Japanese is normal, it seems that only Traditional Chinese has a problem

I used the debugging code I wrote to test your YouTube video, and I only tested manually downloading the zh-TW (Chinese, Taiwan) subtitles.

• Here is the beginning part of the downloaded subtitles on the standard NewPipe version 0.28.0:

0
00:00:05,855 --> 00:00:07,307

1
00:00:07,307 --> 00:00:08,825

2
00:00:08,825 --> 00:00:10,143

3
00:00:10,143 --> 00:00:12,278

4
00:00:12,278 --> 00:00:13,847

5
00:00:13,847 --> 00:00:15,198

• Here is the result that added my debugging code:

0
00:00:05,855 --> 00:00:07,307
等等我———！！

1
00:00:07,307 --> 00:00:08,825
我才不等呢！！

2
00:00:08,825 --> 00:00:10,143
這個是Hina的啦！！！！

3
00:00:10,143 --> 00:00:12,278
沒有那個我活不下去啦

4
00:00:12,278 --> 00:00:13,847
昨晚熬夜打遊戲今天還沒睡夠啊啊

5
00:00:13,847 --> 00:00:15,198
不許撒嬌！！！