No way to 'shorten' the subtitle file as necessary? That said, maybe some users want a bit of extra length for additional subtitles (e.g. additional credits) at the end beyond the original video and audio. But wouldn't that be an authoring decision to be done intentionally by the user? e.g. adding some black sequence intentionally?
When subtitling with 'original' content (e.g. no OV/VF), DCP-o-matic would add as many black frames as needed automatically, so...?

Isn't it simply a fault of a subtitle file being longer than an OV reel, so a suitable hint would be okay? What if e.g. an audio VF track would have a different length than it's OV video reel? Does DCP-o-matic automatically truncate/pad in that scenario?

• Carsten