Hi,
I have a video for which subtitles start points match frame timecodes exactly.

I have set context_length = 0 and I'm using Seek Selection start with the video paused and I noticed that:

• seeking always works for the video, the right frame is displayed
• however, sometimes the wrong subtitle is displayed (it's still the one from the previous seek)
• if I run Seek Selection start once more, the right subtitle is displayed

I don't really know how to reproduce this reliably: if I try to repeatedly seek to one subtitle, then to the previous one, it never fails. However, it happens when I keep seeking to the start of different subtitles sequentially (sub number 1, then number 2, number 3, etc.). Unpausing the video makes the right sub appear.

As a workaround, I now press Ctrl+up twice every time to make sure I get the right subtitle to appear.

I am running gaupol 1.9 and gstreamer 1.16.2 on Gentoo. I haven't yet tried to reproduce on another distro.