即使使用 sudo，FFMPEG 也无法读取我的 NFTS 分区上的文件，并给出错误“权限被拒绝”。这与白名单和加密有关吗？完整日志：
$ cp a.mp3 b.mp3
$ ls -l ?.mp3
-rwxrwxrwx 1 ricardo ricardo 4175244 set 29 13:43 a.mp3
-rwxrwxrwx 1 ricardo ricardo 4175244 set 29 13:45 b.mp3
$ ffmpeg -i b.mp3 -c copy c.mp3 -loglevel 56
libGL error: unable to load driver: r600_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: r600
libGL error: unable to load driver: r600_dri.so
libGL error: driver pointer missing
libGL error: failed to load driver: r600
libGL error: unable to load driver: swrast_dri.so
libGL error: failed to load driver: swrast
X Error: GLXBadContext
Request Major code 156 (GLX)
Request Minor code 6 ()
Error Serial #55
Current Serial #54
ffmpeg version n4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
configuration: --prefix= --prefix=/usr --disable-debug --disable-doc --disable-static --enable-avisynth --enable-cuda --enable-cuvid --enable-libdrm --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfontconfig --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxcb --enable-nonfree --enable-nvenc --enable-omx --enable-runtime-cpudetect --enable-shared --enable-vaapi --enable-vdpau --enable-version3 --enable-xlib
libavutil 56. 14.100 / 56. 14.100
libavcodec 58. 18.100 / 58. 18.100
libavformat 58. 12.100 / 58. 12.100
libavdevice 58. 3.100 / 58. 3.100
libavfilter 7. 16.100 / 7. 16.100
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100
libpostproc 55. 1.100 / 55. 1.100
Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'b.mp3'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option 'c.mp3' ... matched as output url.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument '56'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument 56.
Successfully parsed a group of options.
Parsing a group of options: input url b.mp3.
Successfully parsed a group of options.
Opening an input file: b.mp3.
[NULL @ 0x779340] Opening 'b.mp3' for reading
[file @ 0x779cc0] Setting default whitelist 'file,crypto'
b.mp3: Permission denied