burkaman

ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.0 (GCC)
  configuration: --disable-static --prefix=/nix/store/x50fj1lm30ria4bgmdcvndr1g073ybg2-ffmpeg-3.4.7 --arch=x86_64 --target_os=linux --enable-gpl --enable-version3 --enable-shared --enable-pic --enable-runtime-cpudetect --enable-hardcoded-tables --enable-pthreads --disable-w32threads --disable-os2threads --enable-network --enable-pixelutils --enable-ffmpeg --disable-ffplay --enable-ffprobe --disable-ffserver --enable-avcodec --enable-avdevice --enable-avfilter --enable-avformat --enable-avresample --enable-avutil --enable-postproc --enable-swresample --enable-swscale --disable-doc --enable-bzlib --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libmp3lame --enable-iconv --enable-libtheora --enable-libssh --enable-vaapi --enable-libdrm --enable-vdpau --enable-libvorbis --enable-libvpx --enable-lzma --disable-opengl --enable-libpulse --enable-sdl2 --enable-libsoxr --enable-libx264 --enable-libxvid --en