Adobe Encore FORCES transcode

[juantohu]

Originally Posted by poisondeathray

Q: I wonder why would dvdlab pro would accept those initial streams then? And what was the warning message it gave?

Well, the only warning message that DVD-lab has always reported to me says that open GOPs were detected and that chapter points may not start accurately... but the authored DVD is playable in PS2, X360, standalone player, etc.

Maybe Encore is just being a bitch. Honestly, if Adobe Encore is supposedly targeted at professional video producers it should at least throw a warning message saying "GOP length is too high" or similar instead of just removing the "Don't Transcode" option...

[bigotti5]

It is definitly explained in users guide

From CCE SP 2.70 User´s Guide

page 38
2.15 Pulldown setting
When creating a NTSC video from a film, it is necessary to convert
frame rate from 24 fps to 30fps (60 fields/sec). 3:2 pulldown is a
common method for this convertion. And the 3:2 pulldowned source
will be encoded efficiently and achieve better result applying Inverse
3:2 pulldown.
-When you apply 3:2 pulldown, do not set 00:00:00:00 as a timecode
for the first frame.
-When you apply 3:2 pulldown, Output top field first stream
should be selected. If the source is bottom field first, you should
also confirm that Offset line is 1 or odd number.
-When you output DVD video stream with this option, GOP
sequence should be M=3, N/M=4. To specify GOP sequence,
click Advanced button in the lower right of the encoder setting
window. About Advanced video setting window, see page 43.
...........
page 45
3.1.2 GOP sequence
You can change the GOP sequence modifying M and N/M. M affects
the number of B picture, and N/M does the number of P picture. You
can see the GOP sequence you set above the setting boxes for M and
N/M. The initial setting is M=3, N/M=5.
- Generally, M=3, N/M=5 is used for NTSC DVD, M=3, N/M=4
for PAL DVD.
- When you create a stream for DVD with applying inverse 3:2
pulldown, M=3, N/M=4 should be set.

[juantohu]

While reading your post it all came back to me... I just remembered that I had already read those "rules" in Cinema Craft Encoder SP2 User’s Guide Version 1.10. Specifically the "When you apply 3:2 pulldown, do not set 00:00:00:00 as a timecode for the first frame." bit. I always leave it at 01:00:00:00, anyway.

Thanks for gathering that info, mate.

[Emulgator]

DLP does not check streams thoroughly, only reads headers and relies on this information.
That makes DLP fast, but not foolproof.

With DLP as compressionist I am anyways responsible to know what I'm doing.
DLP tends just to warn about OpenGOPs, (which is a bit unnecessary and can be turned off) and muxes happily on.

For Film on DVD (23.976p soft pulldowned to NTSC 29.97i) a GOP size of max 14, better 12 is recommended.