makie在record时显示ffmpeg错误

ERROR: failed process: Process(ffmpeg -loglevel quiet -i '/tmp/tmpk6VYJE/##video#364.mkv' -i /tmp/tmpk6VYJE/palette.bmp -lavfi 'fps=15,scale=iw:ih:flags=lanczos [x]; [x][1:v] paletteuse' -y ./docs/media/line_gif.gif, ProcessExited(1)) [1]

julia> versioninfo()
Julia Version 1.0.2
Commit d789231e99 (2018-11-08 20:11 UTC)
Platform Info:
OS: Linux (x86_64-pc-linux-gnu)
CPU: Intel(R) Celeron(R) CPU N3150 @ 1.60GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-6.0.0 (ORCJIT, silvermont)

cat /proc/version
Linux version 4.20.0-1-MANJARO (builduser@development) (gcc version 8.2.1 20181127 (GCC)) #1 SMP PREEMPT Mon Dec 24 08:20:48 UTC 2018

这应该是缺少什么库吧,但是ffmpeg已经安装了

你没有把ffmpeg加入环境变量,无法作为一个命令使用。