Forcing GOP start

[doson]

I need to encode a movie I captured to a DVD and I need to create some chapters at very specific times, I know that chapters have to be in a GOP start, I tried to force TMPG to create I-frames at the specific times, thought maybe it will force the program to start a new GOP, and it didn't, so I realy need to know if there's a way to force GOP start at specific frames, in TMPG or any other program.

Thanks.

[BJ_M]

chapters have to be at "I" frames and dont have to be in the start of a GOP ..

you can manually insert I frames with tmpgenc using force picture settings..

[doson]

Well, I did that, but could never fit the chapters exactly where I wanted them to be, though I defined the exact time of the the frames. I actuly imported the chapter list to Maestro, the list is time-based, is there a way ti import a frame-based list to Maestro?

[doson]

I just checked, and Maestro actualy only let you create chapters that are on GOP start.

[BJ_M]

i have no problems on a daily basis to make chapters on any I frame .. in fact Maestro lets you "bump" the chapter points back and forth to the next or prev I frame ... those are not on the start of a GOP either ..

do you have only 1 I frame per GOP? then i could see a issue ...

you can select asset or zero base time code if that will help you importing a chapter list.

[doson]

Never mind, I figured it out.
Thanks anyway

BTW, I did try to encode a file that has only 1 I-frame per GOP (bad idea, I know) just to check, and had no problem.
My problem with the previous file was, that I forgot that I performed a framerate convert so all my times has changed, everything is OK now.