How to find a cell's exact length? (sync issue)

[fataldog187]

Short version: How do you find a cell's precise length (to 3 or 4 decimal points)?

Long version: I'm having a sync issue with GK caused by a cell with no audio. The cell is at the beginnig of a PGC I'm trying to rip and has no audio. The audio stream starts at the second cell with a delay of 0ms. When I try to rip using GK, it will demux the audio stream with delay of 0ms and mux it to the video beginning with cell 1. So the audio will start prematurely and be out of sync for the exact length of cell #1. What I need to do is get the audio to start when cell 2 starts in the avi file. So I think I need to find the exact length of cell 1 so that I can delay the audio track by that length. I need to keep the cell (a warning screen) so just dumping it entirely by deselecting it in DVDDecrypter is not an option. But ANY other suggestions on how to deal with this are welcome!

[adam]

Open that IFO in IFOEdit. It shows time that every cell runs.

[fataldog187]

Thanks! It was still just a bit off but I saw that IFOEdit said there was a layer break there too, so I added another half second (I remember seeing someone say that layer breaks were 500ms) and it's dead on now, thanks a lot!