Subtitles appear twice sometimes

[helloyanis]

Checklist

• I am able to reproduce the bug with the latest version given here: CLICK THIS LINK.
• 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

0.27.0

Steps to reproduce the bug

1. Open a video with colored subtitles such as this one
2. Turn on subtitles for "English (United Kingdom)"

Expected behavior

The subtitles display correctly, like on the official youtube app as shown below

Actual behavior

The subtitles' color and tempo is correct, but they appear twice, as shown below

Screenshots/Screen recordings

Screen_Recording_20240623_083520_NewPipe.mp4

Logs

No response

Affected Android/Custom ROM version

Android 14 / Stock rom

Affected device model

Samsung Galaxy A52s 5G

Additional information

No response

[opusforlife2]

Hmmm. This is occurring on Piped and Invidious too.

[haoyeau]

After debugging on this case, we found out that the decoded subtitle input stream indeed contain duplicate subtitle text. Therefore, this should be a subtitle extractor issue. And the player is totally good for rendering subtitle.

[helloyanis]

After debugging on this case, we found out that the decoded subtitle input stream indeed contain duplicate subtitle text. Therefore, this should be a subtitle extractor issue. And the player is totally good for rendering subtitle.

So should I open the issue elsewhere instead?

[haoyeau]

Sorry, I do not know it either.
I traced back the stream info to get the subtitle
As you can see clearly from this, the subtitle itself is duplicated.

[Thompson3142]

This is already open as an issue on the extractor side: TeamNewPipe/NewPipeExtractor#1102 . Not sure if this issue should be closed since it also needs work on the NewPipe side to function after the extractor changes @opusforlife2 .

[helloyanis]

This is already open as an issue on the extractor side: TeamNewPipe/NewPipeExtractor#1102 . Not sure if this issue should be closed since it also needs work on the NewPipe side to function after the extractor changes @opusforlife2 .

I think I'll keep it open here until it's fixed in NewPipe. Even if it depends on something else it's still an issue that occurs in the app. I'll close it once the extractor is updated and is fixed in newpipe.

[opusforlife2]

Normally, an issue that also needs changes in the extractor is labelled as such and left open. In this case, the extractor itself contains the bug, so NPE users like Piped are also affected. I do not know whether there need to be changes made to the app as well after the extractor is fixed, so I'd keep this open to be safe.