FTBFS with libav9, currently in debian/experimental

Imported from Debian bug http://bugs.debian.org/692810:

Package: blender
Version: 2.63a-1
Severity: important

Hi,

blender currently FTBFS with libav 9:

cd /build/buildd/blender-2.63a/obj-x86_64-linux-gnu/source/blender/blenkernel && /usr/bin/gcc -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE -D__SSE__ -D__MMX__ -D__SSE2__ -D__LITTLE_ENDIAN__ -DGLEW_STATIC -DWITH_AUDASPACE -DUSE_BULLET -DWITH_OPENEXR -DWITH_TIFF -DWITH_OPENJPEG -DWITH_DDS -DWITH_CINEON -DWITH_FRAMESERVER -DWITH_HDR -DWITH_FFMPEG -DWITH_PYTHON -DPARALLEL=1 -DWITH_MOD_FLUID -DWITH_SMOKE -DWITH_OCEANSIM -DWITH_JACK -DWITH_LZO -DWITH_LZMA -DWITH_GAMEENGINE -DWITH_LIBMV -DFFTW3=1 -DWITH_INTERNATIONAL -DNDEBUG -fopenmp -msse2 -msse -pipe -fPIC -funsigned-char -fno-strict-aliasing -Wall -Wcast-align -Werror=declaration-after-statement -Werror=implicit-function-declaration -Werror=return-type -Wstrict-prototypes -Wno-char-subscripts -Wno-unknown-pragmas -Wpointer-arith -Wunused-parameter -Wwrite-strings -Wno-error=unused-but-set-variable -O2 -DNDEBUG -I/build/buildd/blender-2.63a/source/blender/blenkernel -I/build/buildd/blender-2.63a/source/blender/avi -I/build/buildd/blender-2.63a/source/blender/blenfont -I/build/buildd/blender-2.63a/source/blender/blenlib -I/build/buildd/blender-2.63a/source/blender/blenloader -I/build/buildd/blender-2.63a/source/blender/gpu -I/build/buildd/blender-2.63a/source/blender/ikplugin -I/build/buildd/blender-2.63a/source/blender/imbuf -I/build/buildd/blender-2.63a/source/blender/makesdna -I/build/buildd/blender-2.63a/source/blender/makesrna -I/build/buildd/blender-2.63a/source/blender/bmesh -I/build/buildd/blender-2.63a/source/blender/modifiers -I/build/buildd/blender-2.63a/source/blender/nodes -I/build/buildd/blender-2.63a/source/blender/render/extern/include -I/build/buildd/blender-2.63a/intern/guardedalloc -I/build/buildd/blender-2.63a/intern/iksolver/extern -I/build/buildd/blender-2.63a/intern/memutil -I/build/buildd/blender-2.63a/intern/mikktspace -I/build/buildd/blender-2.63a/intern/opennl/extern -I/build/buildd/blender-2.63a/source/blender/windowmanager -I/build/buildd/blender-2.63a/intern/audaspace/intern -I/build/buildd/blender-2.63a/extern/bullet2/src -I/build/buildd/blender-2.63a/intern/ffmpeg -I/build/buildd/blender-2.63a/source/blender/python -I/build/buildd/blender-2.63a/intern/elbeem/extern -I/build/buildd/blender-2.63a/intern/smoke/extern -I/build/buildd/blender-2.63a/intern/decimation/extern -I/build/buildd/blender-2.63a/intern/bsp/extern -I/build/buildd/blender-2.63a/extern/libmv -isystem /usr/include/python3.3m -isystem /usr/include/x86_64-linux-gnu/python3.3m -isystem /build/buildd/blender-2.63a/extern/lzo/minilzo -isystem /build/buildd/blender-2.63a/extern/lzma -isystem /build/buildd/blender-2.63a/extern/recastnavigation -Wno-deprecated-declarations -Wno-unused-parameter -Wno-error=unused-but-set-variable -o CMakeFiles/bf_blenkernel.dir/intern/writeffmpeg.c.o -c /build/buildd/blender-2.63a/source/blender/blenkernel/intern/writeffmpeg.c
/build/buildd/blender-2.63a/source/blender/blenkernel/intern/writeffmpeg.c:41:28: fatal error: libavcodec/opt.h: No such file or directory
compilation terminated.
make[3]: *** [source/blender/blenkernel/CMakeFiles/bf_blenkernel.dir/intern/writeffmpeg.c.o] Error 1

It needs to be updated to the new API provided by libav 9.

-- System Information:
Debian Release: wheezy/sid
  APT prefers precise-updates
  APT policy: (500, 'precise-updates'), (500, 'precise-security'), (500, 'precise-proposed'), (500, 'precise')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-32-generic (SMP w/4 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash