[FFmpeg-devel] make: *** [ffbuild/common.mak:67: libavfilter/vf_nnedi.o] Error 1

[Hongyi Zhao]

On Ubuntu 20.10, I try to compile the latest git master version of
ffmpeg as below:

# In the needed prerequisites and execute the following command:
$ sudo apt-get build-dep ffmpeg
$ git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg.git
$ cd ffmpeg.git
$ ./configure  --enable-rpath    --enable-gpl    --enable-version3
--enable-nonfree    --enable-shared    --enable-small    --enable-gray
   --enable-avresample    --enable-avisynth    --enable-chromaprint
--enable-frei0r    --enable-gcrypt    --enable-gmp    --enable-ladspa
  --enable-libaom    --enable-libaribb24    --enable-libass
--enable-libbluray    --enable-libbs2b    --enable-libcaca
--enable-libcelt    --enable-libcdio    --enable-libcodec2
--enable-libdav1d    --enable-libdc1394    --enable-libfdk-aac
--enable-libflite    --enable-libfontconfig    --enable-libfreetype
--enable-libfribidi    --enable-libgme    --enable-libgsm
--enable-libiec61883    --enable-libjack    --enable-libklvanc
--enable-liblensfun    --enable-libmodplug    --enable-libmp3lame
--enable-libopencore-amrnb    --enable-libopencore-amrwb
--enable-libopenh264    --enable-libopenjpeg    --enable-libopenmpt
--enable-libopus    --enable-libpulse    --enable-librabbitmq
--enable-librsvg    --enable-librubberband    --enable-librtmp
--enable-libshine    --enable-libsnappy    --enable-libsoxr
--enable-libspeex    --enable-libsrt    --enable-libssh
--enable-libtesseract    --enable-libtheora    --enable-libtwolame
--enable-libv4l2    --enable-libvidstab    --enable-libvmaf
--enable-libvo-amrwbenc    --enable-libvorbis    --enable-libvpx
--enable-libwebp    --enable-libx264    --enable-libx265
--enable-libxavs2    --enable-libdavs2    --enable-libxcb
--enable-libxcb-shm    --enable-libxcb-xfixes    --enable-libxcb-shape
   --enable-libxvid    --enable-libxml2    --enable-libzmq
--enable-libzvbi    --enable-lv2    --enable-libmysofa
--enable-openal    --enable-opencl    --enable-opengl
--enable-openssl    --enable-pocketsphinx    --enable-vulkan
--enable-libdrm    --enable-libmfx    --enable-pic    --enable-thumb
 --enable-lto    --enable-hardcoded-tables    --enable-extra-warnings
  --enable-memory-poisoning    --enable-ftrapv
--enable-neon-clobber-test    --enable-xmm-clobber-test
--enable-random    --enable-linux-perf --disable-avresample

$ make
[...]
libavfilter/vf_nnedi.c: At top level:
libavfilter/vf_nnedi.c:819:13: error: conflicting types for ‘read’
  819 | static void read(float *dst, size_t n, const float **data)
      |             ^~~~
In file included from /usr/include/unistd.h:1183,
                 from ./libavutil/timer.h:35,
                 from ./libavutil/internal.h:42,
                 from ./libavutil/common.h:532,
                 from libavfilter/vf_nnedi.c:24:
/usr/include/x86_64-linux-gnu/bits/unistd.h:36:1: note: previous
definition of ‘read’ was here
   36 | read (int __fd, void *__buf, size_t __nbytes)
      | ^~~~
libavfilter/vf_nnedi.c: In function ‘subtract_mean_predictor’:
libavfilter/vf_nnedi.c:982:27: warning: comparison of integer
expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long
unsigned int’} [-Wsign-compare]
  982 |         for (int k = 0; k < filter_size; k++)
      |                           ^
libavfilter/vf_nnedi.c:986:23: warning: comparison of integer
expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long
unsigned int’} [-Wsign-compare]
  986 |     for (int k = 0; k < filter_size; k++)
      |                       ^
libavfilter/vf_nnedi.c:992:27: warning: comparison of integer
expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long
unsigned int’} [-Wsign-compare]
  992 |         for (int k = 0; k < filter_size; k++) {
      |                           ^
libavfilter/vf_nnedi.c:1006:27: warning: comparison of integer
expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long
unsigned int’} [-Wsign-compare]
 1006 |         for (int k = 0; k < filter_size; k++) {
      |                           ^
libavfilter/vf_nnedi.c:1011:23: warning: comparison of integer
expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long
unsigned int’} [-Wsign-compare]
 1011 |     for (int k = 0; k < filter_size; k++)
      |                       ^
libavfilter/vf_nnedi.c:1016:30: warning: comparison of integer
expressions of different signedness: ‘unsigned int’ and ‘int’
[-Wsign-compare]
 1016 |     for (unsigned nn = 0; nn < nns; nn++) {
      |                              ^
make: *** [ffbuild/common.mak:67: libavfilter/vf_nnedi.o] Error 1


Any hints for solving this problem are highly appreciated.

Regards,
--
Assoc. Prof. Hongyi Zhao <hongyi.zhao at gmail.com>
Theory and Simulation of Materials
Hebei Polytechnic University of Science and Technology engineering
NO. 552 North Gangtie Road, Xingtai, China