HandBrake uses a lot of cool libraries from the GNU/Linux world. Thank their authors !

libdvdcss authors :

Billy Biggs 
Stéphane Borel
Håkan Hjort
Samuel Hocevar
Eugenio Jarosiewicz
Jon Lech Johansen
Markus Kuespert
Pascal Levesque
Steven M. Schultz
David Siebörger
Alex Strelnikov
German Tischler
Gildas Bazin

libdvdread authors :

Björn Englund
Hâkan Hjort
Billy Biggs
Christian Wolff

libdvdplay authors :

Håkan Hjort
Martin Norbäck
Stéphane Borel

mpeg2dec authors :

Aaron Holtzman
Michel Lespinasse
Bruno Barreyra
Gildas Bazin
Alexander W. Chin
Stephen Crowley
Didier Gautheron
Ryan C. Gordon
Peter Gubanov
Hâkan Hjort
Nicolas Joly
Gerd Knorr
David I. Lehn
Olie Lho
Rick Niles
Real Ouellet
Bajusz Peter
Franck Sicard
Brion Vibber
Martin Vogt
Fredrik Vraalsen

Ffmpeg authors :

Fabrice Bellard
Alex Beregszaszi
Brian Foley
Arpad Gereoffy
Philip Gladstone
Falk Hueffner
Zdenek Kabelac
Nick Kurshev
Michael Niedermayer
François Revol
Dieter Shirley
Juan J. Sierralta
Lionel Ulmer

a52dec authors :

Aaron Holtzman
Michel Lespinasse
Gildas Bazin
Billy Biggs
Eduard Hasenleithner
Håkan Hjort
Charles M. Hannum
Chris Hodges
Michael Holzt
Angelos Keromytis
David I. Lehn
Don Mahurin
Jim Miller
Takefumi Sayo
Shoji Tokunaga

lame authors :

Mike Cheng
Robert Hegemann
Frank Klemm
Alexander Leidinger
Naoki Shibata
Mark Taylor
Takehiro Tominiga
Iván Cavero Belaunde
Gabriel Bouvigne
Florian Bomers
CISC
John Dahlstrom
John Dee
Albert Faber
Peter Gubanov
Lars Magne Ingebrigtsen 	
Yosi Markovich
Zdenek Kabelac
Iwasa Kazmi
Guillaume Lessard
Steve Lhomme
Don Melton
Viral Shah
Acy Stapp
Roel VdB