When sending DVDs to other countries, please ensure that the format, NTSC or PAL,  is what the country uses, otherwise they may not be able to play back the DVDs.
Here is the “DVD NTSC/PAL Country List” for your reference.  Download the Free PDF here.
DVD NTSC/PAL Country List

COUNTRY
DVD FORMAT
COUNTRY
DVD FORMAT

Algeria
PAL
Lebanon
PAL

Argentina
PAL
Malta
PAL

Australia
PAL
Malaysia
PAL

Austria
PAL
Mexico
NTSC

Bahamas
NTSC
Morocco
PAL

Bahrain
PAL
Netherlands
PAL

Belgium
PAL
New Zealand
PAL

Bermuda
NTSC
Nigeria
PAL

Bolivia
NTSC
Norway
PAL

Brazil
PAL
Oman
PAL

Canada
NTSC
Pakistan
PAL

Chile
NTSC
Panama
NTSC

China
PAL
Peru
NTSC

Columbia
NTSC
Philippines
NTSC

Costa Rica
NTSC
Poland
PAL

Cyprus
PAL
Portugal
PAL

Czech Rep.
PAL
Romania
PAL

Denmark
PAL
Russia
…

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Here the list of fixes and improvements:
Version 1.6.1.0: 2009 06 14

fixed 3-pass encoding
audio is only encoded in last pass
new: stream is now completely processed by the chameleon engine, completely reclocked, realigned, resegmented, refit
FFmpeg no longer demuxes, parses or damages the stream in any way. FFmpeg still decodes video/audio/subtitles and encodes video/audio, mixes video, audio (scale, crop, deinterlace, subtitle …

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