How to split one MPEG2-PS file into several titles for dvdauthor?

Hello Dvdauthor-users,

  I have one big PAL-DVD MPEG2 file (720x567, DAT=16:9, one stream of MP2
 audio). It was prepared with

ffmpeg -y -i in.mp4 --format pal-dvd -f dvd -q:v 1 -pass 1/2 title.mpg

 This file works with dvdauthor, as one title.

 But I want to split it to several titles (in one title set), because
chapters is very limited: for example, it is not possible to add conditional
jump to end of chapter.

 How could I do such split? I have 11 split points, accurate up to second,
and I understand, that proper split could be done only at I frame points, so
resulting splitting point could be slightly shifted. It is Ok.

 I've tried this (I'm showing only 2 splitting points here, not 11):

ffmpeg -y -i title.mpg \
 -f dvd -codec:v copy -codec:a copy -to 00:00:20 -sn title_01.mpg \
 -f dvd -codec:v copy -codec:a copy -ss 00:00:20 -to 00:04:40 -sn
   title_02.mpg \
 -f dvd -codec:v copy -codec:a copy -ss 00:57:10 -sn "title_12.mpg"


 But afdter this, dvdauthor refuse to use this files, even after remux (but
not recode, of course!) with DVDStyler. Error occurs on second file and
message is:

STAT: Processing dvd-cache/entry042.vob...
STAT: VOBU 50 at 11MB, 10 PGCs
...
STAT: VOBU 466 at 114MB, 10 PGCs
ERR: Cannot infer pts for VOBU if there is no audio or video and it is the
ERR: first VOBU.

 But here is a clue: file in question is only 112328704 bytes long! Looks
like, I'm splitting PS wrong!

 What is proper way to split MPEG2-PS stream for using resulting chunks as
titles with dvdauthor, to have all frames & smooth transitions between them?

-- 
Best regards,
 Lev                          mailto:[email protected]


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