Chanfrault's film music composition work in 2003 included the movie Haute Tension by filmmaker Alexandre Aja and Who Killed Bambi?
He released his first music album, Computer-Assisted Sunset, on compact disc in 2005 via the label MK2, which received a positive reception from publications including Fnac and Les Inrocks.
Chanfrault's compositions for the 2007 film Inside directed by Julien Maury and Alexandre Bustillo were positively received by media including Popjournalism.
He also composed the music for two more films in 2008: Vinyan by filmmaker Fabrice Du Welz, and The Wedding Song (Le Chant des mariées) directed by Karin Albou.
His music for the television movie Belleville Story directed by Arnaud Malherbe was favorably reviewed in two separate articles in L'Express.
[11] Chanfrault's work on the music for the 2006 film The Hills Have Eyes directed by Alexandre Aja inspired the tone for the 2011 documentary Après la gauche by filmmaker Jeremy Forni.
[12] Chanfrault composed the music of the 2007 film Inside, which was directed by Julien Maury and Alexandre Bustillo and starred Alysson Paradis, Béatrice Dalle, Nathalie Roussel, and Tahar Rahim.
[22][23] Writing for Gamona, reviewer Martin Beck commented favorably on "a hypnotic score by François-Eudes Chanfrault (known for his equally great music for Inside).