Ma question provient de mon problème de démarrage de ffmpeg. J'ai installé ffmpeg et il s'affiche comme installé:
whereis ffmpeg
ffmpeg: /usr/bin/ffmpeg /usr/bin/X11/ffmpeg /usr/share/ffmpeg /usr/share/man/man1/ffmpeg.1.gz
Plus tard, j'ai compris que certains programmes dépendent de bibliothèques qui ne viennent pas avec l'installation elle-même, j'ai donc vérifié avec la commande ldd ce qui manque:
# ldd /usr/bin/ffmpeg
linux-vdso.so.1 => (0x00007fff71fe9000)
libavfilter.so.0 => not found
libpostproc.so.51 => not found
libswscale.so.0 => not found
libavdevice.so.52 => not found
libavformat.so.52 => not found
libavcodec.so.52 => not found
libavutil.so.49 => not found
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f5f20bdf000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f5f209c0000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f5f205fb000)
/lib64/ld-linux-x86-64.so.2 (0x00007f5f20f09000)
En fin de compte, mon ffmpeg est coupé de 7 bibliothèques aussi. J'ai d'abord pensé que chacune de ces bibliothèques devait être installée, mais j'ai pensé que certaines ou toutes pourraient être installées, mais leur emplacement n'était pas connu de ffmpeg. J'ai lu que /etc/ld.so.conf et /etc/ld.so.cache contiennent les chemins d'accès aux bibliothèques, mais j'étais confus, car, il n'y avait qu'une seule ligne dans
/etc/ld.so.conf
cat /etc/ld.so.conf
include /etc/ld.so.conf.d/*.conf
mais très longtemps /etc/ld.so.cache
.
J'en suis maintenant à un point où je me sens perdu comment enquêter davantage, il pourrait être une prochaine étape utile pour comprendre, comment je peux déterminer si une bibliothèque donnée est effectivement installée même si son emplacement est inconnu de ffmpeg.
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Pinned packages:
apt-get -f install
dans votre question, s'il vous plaît? Remarque: ubuntu est basé sur Ubuntu 14.04, vous pouvez donc y regarder si ffmpeg n'est pas inclus dans votre distribution.