MAN     doc/libavfilter.3
CC      ffmpeg.o
ffmpeg.c: In function ‘sigterm_handler’:
ffmpeg.c:329:14: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
         write(2/*STDERR_FILENO*/, "Received > 3 system signals, hard exiting\n",
              ^
CC      cmdutils.o
CC      ffmpeg_opt.o
CC      ffmpeg_filter.o
LD      ffmpeg_g
libavcodec/libavcodec.a(qsv.o): En la función `ff_qsv_set_display_handle':
/video/ffmpeg/libavcodec/qsv.c:123: referencia a `vaGetDisplayDRM' sin definir
libavcodec/libavcodec.a(qsv.o): En la función `ff_qsv_init_internal_session':
/video/ffmpeg/libavcodec/qsv.c:230: referencia a `MFXVideoUSER_Load' sin definir
collect2: error: ld returned 1 exit status
make: *** [ffmpeg_g] Error 1