>ffmpeg -i "2018-04-05 13-44-19.mkv"
ffmpeg version N-90335-ga7a8320c4f Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 7.3.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
libavutil 56. 10.100 / 56. 10.100
libavcodec 58. 14.100 / 58. 14.100
libavformat 58. 10.100 / 58. 10.100
libavdevice 58. 2.100 / 58. 2.100
libavfilter 7. 13.100 / 7. 13.100
libswscale 5. 0.102 / 5. 0.102
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100
Input #0, matroska,webm, from '2018-04-05 13-44-19.mkv':
Metadata:
ENCODER : Lavf57.84.100
Duration: 00:17:23.32, start: 0.000000, bitrate: 46843 kb/s
Stream #0:0: Video: h264 (High 4:4:4 Predictive), yuv420p(progressive), 1280x720, 1k fps, 25 tbr, 1k tbn, 50 tbc (default)
Metadata:
DURATION : 00:17:23.320000000
Stream #0:1: Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
title : Track1
DURATION : 00:17:23.307000000
Stream #0:2: Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
title : Track2
DURATION : 00:17:23.285000000
Stream #0:3: Audio: aac (LC), 48000 Hz, stereo, fltp (default)
Metadata:
title : Track3
DURATION : 00:17:23.285000000
At least one output file must be specified