Pertanyaan saya berasal dari masalah saya dalam memulai ffmpeg. Saya telah menginstal ffmpeg dan ditampilkan sebagai terinstal:
whereis ffmpeg
ffmpeg: /usr/bin/ffmpeg /usr/bin/X11/ffmpeg /usr/share/ffmpeg /usr/share/man/man1/ffmpeg.1.gz
Kemudian, saya menemukan, bahwa beberapa program bergantung pada pustaka yang tidak datang dengan instalasi itu sendiri, jadi saya memeriksa dengan perintah ldd apa yang hilang:
# 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)
Ternyata ffmpeg saya terputus dari 7 perpustakaan juga bekerja. Saya pertama kali berpikir bahwa masing-masing perpustakaan harus diinstal, tetapi daripada yang saya tahu, bahwa beberapa atau semua mungkin diinstal, tetapi lokasinya tidak diketahui oleh ffmpeg. Saya membaca bahwa /etc/ld.so.conf dan /etc/ld.so.cache berisi path ke pustaka, tetapi saya bingung, karena, hanya ada satu baris di
/etc/ld.so.conf
cat /etc/ld.so.conf
include /etc/ld.so.conf.d/*.conf
tapi sangat panjang /etc/ld.so.cache
.
Saya sekarang pada titik di mana saya merasa kehilangan cara untuk menyelidiki lebih lanjut, Mungkin ini merupakan langkah selanjutnya yang bermanfaat untuk mencari tahu, bagaimana saya dapat menentukan apakah perpustakaan yang diberikan memang diinstal bahkan jika lokasinya tidak diketahui oleh ffmpeg.
---------Output---of----apt-cache-policy-----request---------
apt-cache policy
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Pinned packages:
apt-get -f install
ke pertanyaan Anda? Catatan: ubuntu didasarkan pada Ubuntu 14.04, jadi Anda bisa melihat di sana jika ffmpeg tidak termasuk dalam distribusi Anda.