Specifically, the GPL parts of FFmpeg are
- libpostproc
+- libmpcodecs
- optional x86 optimizations in the files
libavcodec/x86/idct_mmx.c
+- libutvideo encoding/decoding wrappers in
+ libavcodec/libutvideo*.cpp
- the X11 grabber in libavdevice/x11grab.c
+- the swresample test app in
+ libswresample/swresample-test.c
+- the texi2pod.pl tool
+- the following filters in libavfilter:
+ - vf_blackframe.c
+ - vf_boxblur.c
+ - vf_colormatrix.c
+ - vf_cropdetect.c
+ - vf_delogo.c
+ - vf_hqdn3d.c
+ - vf_mp.c
+ - vf_super2xsai.c
+ - vf_tinterlace.c
+ - vf_yadif.c
+ - vsrc_mptestsrc.c
There are a handful of files under other licensing terms, namely: