Question: Who directed the 2008 film based on Andreas Hinterstoisser's experience climbing the Eiger?

Context paragraphs:
The Kautokeino Rebellion: The Kautokeino Rebellion (Norwegian: Kautokeino-opprøret , Northern Sami: Guovdageainnu Stuimmit ) is a 2008 film based on the true story of the Kautokeino riots in Kautokeino, Norway in 1852 in response to the Norwegian exploitation of the Sami community at that time.  It is directed by Nils Gaup and was released in January, 2008.  Music to this movie was mostly composed by Sami musician Mari Boine.

North Face (film): North Face (German: "Nordwand" ) is a 2008 German historical fiction film directed by Philipp Stölzl and starring Benno Fürmann, Florian Lukas, Johanna Wokalek, and Ulrich Tukur.  Based on the famous 1936 attempt to climb the Eiger north face, the film is about two German climbers involved in a competition to climb the most dangerous rock face in the Alps.

Dror Zahavi: Dror Zahavi (born 6 February 1959) is an Israeli film director and screenwriter.  He has directed more than 25 films and television shows since 1992.  His 2008 film "For My Father" was entered into the 30th Moscow International Film Festival.

The Eiger Sanction (film): The Eiger Sanction is a 1975 American thriller film directed by and starring Clint Eastwood.  Based on the 1972 novel "The Eiger Sanction" by Trevanian, the film is about an art history professor, mountain climber and former assassin once employed by a secret United States government agency who is blackmailed into returning to his deadly profession and do one more "sanction", a euphemism for killing.  He agrees to join an international climbing team in Switzerland planning an ascent of the Eiger north face in order to complete a second sanction to avenge the murder of an old friend.  The film was produced by Robert Daley for Eastwood's Malpaso Company, with Richard D. Zanuck and David Brown as executive producers, and co-starred George Kennedy, Vonetta McGee and Jack Cassidy.

The Mysteries of Pittsburgh (film): The Mysteries of Pittsburgh is a 2008 film based on Michael Chabon's 1988 novel of the same name.  The screenplay was written by Rawson Marshall Thurber, who also directed.  It was produced by Michael London and executive produced by Omar Amanat.  Shooting in Pittsburgh ended in October 2006, with the film set for release in 2008.  It made its world premiere in January 2008 at the Sundance Film Festival.  Set in 1980s Pittsburgh, the film follows the affairs of two young men with one woman, and later also with each other.

The Doll (2008 film): The Doll is a 2008 film based on a short story of the same name written by author Charles W. Chesnutt.  It was directed by Dante J. James from a screenplay written by James and Joy Kecken.  It stars Clayton LeBouef, Monique Brown, Jan Forbes, and Carter Jahncke.  Filmed in Annapolis, Maryland, the story is believed to have been set in Cincinnati, Ohio in the early 1900s.

Senseless (2008 film): Senseless is a 2008 film based on Stona Fitch's 2001 novel of the same name, starring Jason Behr and Emma Catherwood, and directed by Symon Hynd.

Toni Kurz: Toni Kurz (13 January 1913 – 22 July 1936) was a German mountain climber active in the 1930s.  He died during an attempt to climb the Eiger north face with his partner Andreas Hinterstoisser.

Andreas Hinterstoisser: Andreas Hinterstoisser (3 October 1914 – 21 July 1936) was a German mountain climber active in the 1930s.  He died during an attempt to climb the Eiger north face with his partner Toni Kurz.  A section of the north face was later named the "Hinterstoisser Traverse" in his honor.  The 2008 film "North Face" was based on his experience climbing the Eiger.

Willy Angerer: Willy Angerer (c. 1905 – July 21, 1936) was an Austrian mountaineer.  He was one of four mountaineers who died in the 1936 Eiger north face climbing disaster, along with Toni Kurz, Andreas Hinterstoisser and Eduard Rainer.  At twenty-seven Angerer was the oldest of the four climbers who died.

Supporting paragraphs: Andreas Hinterstoisser North Face (film)
Answer: Philipp Stölzl