我正在尝试修复我的 ffmpeg 问题。当我上传任何视频时，它都会给我一个错误，提示未找到预设“正常”的文件，并且无法加载文件。有什么想法吗？
Started on 2013-09-10 20:50:45 - 2013 Sep 10
Checking File ....
File : /home/admin/clip/files/conversion_queue/13788318456eb9d.mkv
File Exists : Yes
Preparing file...
format : matroska,webm
duration : 137.71
size : 10177263
bitrate : 577
video_width : 554
video_height : 312
video_wh_ratio : 1.775641025641
video_codec : h264
video_rate : 24.99455377242
video_bitrate : 483
video_color : N/A
audio_codec : aac
audio_bitrate : 91
audio_rate : 44100
audio_channels : stereo
path : /home/admin/clip/files/conversion_queue/13788318456eb9d.mkv
Converting Video
Conversion Command : /usr/bin/ffmpeg -i /home/admin/clip/files/conversion_queue/13788318456eb9d.mkv -f flv -vcodec libx264 -vpre normal -r 25 -s 554x312 -aspect 1.775641025641 -vf pad=0:0:0:0:black -acodec libfaac -ab 128000 -ar 22050 /home/admin/clip/files/videos/13788318456eb9d.flv 2> /home/admin/clip/files/temp/13788318458b33a.tmp
Conversion Details
ffmpeg version 0.9.2, Copyright (c) 2000-2012 the FFmpeg developers
>built on May 11 2013 13:27:19 with gcc 4.1.2 20080704 (Red Hat 4.1.2-52)
>configuration: --prefix=/usr --libdir=/usr/lib --shlibdir=/usr/lib -->mandir=/usr/share/man --enable-shared --enable-runtime-cpudetect --enable-gpl --enable->version3 --enable-postproc --enable-avfilter --enable-pthreads --enable-x11grab --enable->vdpau --disable-avisynth --enable-libdc1394 --enable-libgsm --enable-libmp3lame --enable->libnut --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable->libtheora --enable-libvorbis --enable-libx264 --enable-libxavs --enable-libxvid --extra->cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector -->param=ssp-buffer-size=4 -m32 -march=i386 -mtune=generic -fasynchronous-unwind-tables' -->?>disable-stripping
libavutil 51. 32. 0 / 51. 32. 0
libavcodec 53. 42. 4 / 53. 42. 4
libavformat 53. 24. 2 / 53. 24. 2
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 53. 0 / 2. 53. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
Input #0, matroska,webm, from >'/home/admin/clip/files/conversion_queue/13788318456eb9d.mkv':
Duration: 00:02:17.71, start: 0.000000, bitrate: 591 kb/s
Stream #0:0: Video: h264 (Baseline), yuv420p, 554x312 [SAR 1:1 DAR 277:156], 25 fps, >25 tbr, 1k tbn, 50 tbc (default)
Stream #0:1: Audio: aac, 44100 Hz, stereo, s16 (default)
File for preset 'normal' not found
Failed to stat file /home/admin/clip/files/videos/13788318456eb9d.flv!
Failed to stat file /home/admin/clip/files/videos/13788318456eb9d.flv!
Unknown file details - Unable to get output video details using FFMPEG
Time Took : 0.0833 seconds
conversion_status : failed