Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

Hi, thanks for the comments.

This is a standard SRT file that can be used to reproduce this issue (just rename to srt if needed):

subtitles.txt

Here are some examples:

These lines are displayed as:

should be displayed as:

These lines are displayed as:

Should be displayed as:

You can notice that the punctuation marks are displayed to the right of the sentences and should be displayed to the left (as in all RTL languages). Hope you are good with Hebrew :-)

Thank you for the test file and screenshots, that's really helpful.

I took your SRT file and adapted it to WebVTT so I could add some styling (borrowed from one of our test files), and confirmed that this PR currently strips styling info.

Using this file (just rename to .vtt suffix):
vtt-2553.txt

Compare before your change (styling visible, punctuation in the wrong place):

With after (styling lost, punctuation in the correct place):

Please take a look and see if you can tweak this PR so it puts the punctuation in the correct place while preserving (or restoring) the span styling.

I was able to reproduce the styling issues with the VTT file on my side, I think the best option here will be to manipulate the cues and then restore the original spans with the indices fixed. I am working on this.