Aehm, timing problems and not everyone plays the same?

let's suppose that CPU is fast enough. what else ?

Good luck

I'm looking for programmers. Can pay paypal.
I used ProcMon to see what happened on video playback.

I used "Harvester" game, I see dosbox ReadFile, using 4kb blocks and show it decoded (delay?).

23:52:47,1279655 dosbox.exe 3748 ReadFile C:\games\harv_cd\GRAPHIC\FST\VIRGLOGO.FST SUCCESS Offset: 0, Length: 4096, Priority: Normal
...
590 times to ReadFile with 4096 byte blocksize until the end of file (2366 kb) or until ESC pressed.

23:52:58,5365083 dosbox.exe 3748 CloseFile C:\games\harv_cd\GRAPHIC\FST\VIRGLOGO.FST SUCCESS

Total - 11 sec, like the video length.

subtitle file will contain offset, text, time to show, for example:
0, Hello, 1
in the middle of playbak offset of read will be ~= 1 183 000
1183000, This is the middle of videofile, 1

I want to make subtitles for games.

done and works

https://github.com/jack7277/Dosbox-Subtitle-Loader

For something like Harvester, it would probably be much easier to reverse-engineer the video format (assuming that hasn't already been done – it can't be something very unusual), insert the subtitles, and then re-encode the videos.

ok, but idea works