Hi, it seems it’s not possible to adjust “built-in” subtitles like delay or speed up according to the video?
I can only get it working with external subtitles like srt. Then I’m able to delay them.
Is this something that will come in the a future version? 
Do you know what type of embedded subtitles you have?
Some embedded subtitles (like those found in DVD and Blu-ray discs) are hardcoded to the video and cannot be adjusted.
Sorry, it’s regular MKV files with .srt embedded. If I extract the .srt files and place them alongside the MKV then I’m able to adjust the time. I know the Popcorn Hour supported delays with embedded .srt files.
Only Way to solve it is by downloading or extracting so you get an external Srt.
Valid for all mkv and I think mp4 as well.
This should actually be working in the current version.
If you have a chance, would you be able to send in one of these problematic videos with embedded subs so we could review it here?
James, I’ve uploaded a sample now (DH.mkv). Thanks.
Will take a look. Thanks!