Meine Frage rührt von meinem Problem beim Starten von ffmpeg her. Ich habe ffmpeg installiert und es wird als installiert angezeigt:
whereis ffmpeg
ffmpeg: /usr/bin/ffmpeg /usr/bin/X11/ffmpeg /usr/share/ffmpeg /usr/share/man/man1/ffmpeg.1.gz
Später stellte ich fest, dass einige Programme von Bibliotheken abhängen, die nicht mit der Installation selbst geliefert werden. Deshalb überprüfte ich mit dem Befehl ldd, was fehlt:
# 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)
Wie sich herausstellt, ist mein ffmpeg von 7 Bibliotheken abgeschnitten, um zu funktionieren. Ich dachte zuerst, dass jede dieser Bibliotheken installiert werden muss, aber als ich herausfand, dass einige oder alle installiert sein könnten, aber ihr Speicherort ist ffmpeg unbekannt. Ich habe gelesen, dass /etc/ld.so.conf und /etc/ld.so.cache die Pfade zu den Bibliotheken enthalten, aber ich war verwirrt, weil nur eine Zeile darin war
/etc/ld.so.conf
cat /etc/ld.so.conf
include /etc/ld.so.conf.d/*.conf
aber ein sehr langer /etc/ld.so.cache
.
Ich bin jetzt an einem Punkt angelangt, an dem ich mich nicht mehr weiter erforschen kann. Es könnte ein hilfreicher nächster Schritt sein, herauszufinden, wie ich feststellen kann, ob eine bestimmte Bibliothek tatsächlich installiert ist, auch wenn ihr Speicherort ffmpeg unbekannt ist.
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Pinned packages:
apt-get -f install
bitte auch die Ausgabe von in deine Frage einfügen ? Hinweis: ubuntu basiert auf Ubuntu 14.04, Sie können also nachsehen, ob ffmpeg nicht in Ihrer Distribution enthalten ist.