GOP Length Error

[MarkGrigsby]

I'm using CCE with GOP settings as shown in the attached picture (structure /IPPPPIPPPPIPPPP/), however I am getting several GOP lengths over 15 (up to 22). This is causing an error in my authoring program.

Any idea how I can correct this?

Thank you!

Mark.

[MarkGrigsby]

Don't know why, but the attachment isn't working... My GOP settings are:

M=1
N/M=5
GOP Header every 3xN frames
SEQ Header every 1 GOP

[Video Dude]

Mods have to first approve attachments before they are displayed.


You DVD authoring program is complaining because your GOP settings are not compliant.

If you have 24fps with pulldown:
M=3
N=12
N/M=4
GOP Header every 1xN frames (but should be grayed out)
SEQ Header every 1 GOP


If you have 29.97fps:
M=3
N=15
N/M=5
GOP Header every 1xN frames (but should be grayed out)
SEQ Header every 1 GOP

[MarkGrigsby]

The DVD authoring error actually states 'GOP lengths are too large'. I analysed the stream using BitrateViewer, and I found 16 GOPs with length over 18, which I know is the DVD limit.

I'm confused as to why CCE is letting this happen, when my structure is specified to length 15?

[kolak]

DVD-Video limit are: for Pal 15 and NTSC 18 (frame)
Try default setings M=3 M/N=5. The probably problem is your strange setting M=1.

[SeeMoreDigital]

As a matter of interest, are there any tools that are able to adjust the GOP lengths of Mpeg2 (and Mpeg1 streams), without re-encoding?


Cheers