调用ffmpeg命令：
ffmpeg -y -ss "00:00:02" -i 5ccaea226acfc1b4b75ccd1a9f09512c.mxf -frames 30 -f image2 -vf "fps=1/1.25,scale='min(420,iw)':-1" video%04d.jpg
导致失败：
ffmpeg failed: ffmpeg version N-85692-g78a5fc4 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
configuration: --prefix=/tmp/gm-ffmpeg-1.0.4/BUILD/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/tmp/gm-ffmpeg-1.0.4/BUILD/ffmpeg_build/include --extra-ldflags=-L/tmp/gm-ffmpeg-1.0.4/BUILD/ffmpeg_build/lib --bindir=/tmp/gm-ffmpeg-1.0.4/BUILDROOT/gm-ffmpeg-1.0.4-1.el7.centos.x86_64/opt/graymeta/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
libavutil 55. 61.100 / 55. 61.100
libavcodec 57. 93.100 / 57. 93.100
libavformat 57. 72.101 / 57. 72.101
libavdevice 57. 7.100 / 57. 7.100
libavfilter 6. 87.100 / 6. 87.100
libswscale 4. 7.101 / 4. 7.101
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
[mxf @ 0x2c6da60] broken or empty index
Input #0, mxf, from '/alloc/5ccaea226acfc1b4b75ccd1a9f09512c.mxf':
Metadata:
uid : 27b07007-2dc8-4305-a78a-81a612d78b94
generation_uid : ef5ae870-4075-4513-ea1f-39c0ed197267
company_name : Colorfront
product_name : Transkoder
product_uid : 3a4fe380-0d01-11e4-869f-3cd92b5c1dfc
product_version : 2.7.3.20150121
application_platform: Microsoft Windows 7 Professional Service Pack 1 (Build 7601)
modification_date: 2016-09-09T11:29:39.000000Z
material_package_umid: 0x060A2B340101010501010F20130000008991E1DCEA584837149E72E7F9F0E09D
timecode : 00:00:17;12
Duration: 00:11:58.92, start: 0.000000, bitrate: 150802 kb/s
Stream #0:0: Video: jpeg2000, yuv422p10le(progressive), 3840x2160, SAR 1:1 DAR 16:9, 59.94 fps, 59.94 tbr, 59.94 tbn, 59.94 tbc
Metadata:
file_package_umid: 0x060A2B340101010501010F2013000000F8B3B48BE8044408DDD6303A6D43F566
track_name : Picture
Stream mapping:
Stream #0:0 -> #0:0 (jpeg2000 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
: signal: killed
我不确定如何解释此错误消息以及实际失败的原因。这个文件大约90GB，以4K分辨率拍摄，但长约11秒。