Разделенное видео FFmpeg не начинается с 0 секунд

Question

При разделении видео он начинается не с 0 секунды. Я следовал синтаксису, который я прочитал во многих постах, например:

ffmpeg -ss 00:00:00 -t 00:00:15 -i 'Wildlife.wmv' '1.wmv'
ffmpeg -i 'Wildlife.wmv' -ss 00:00:00 -t 00:00:15 '1.wmv'
ffmpeg -ss 00:00:00 -i 'Wildlife.wmv'  -t 00:00:15 '1.wmv'

Ни с одной из вышеперечисленных команд я не могу разделить видео с начала до 15 секунд.

ffmpeg-php version string: 0.6.0-svn
ffmpeg-php build date string: Mar  7 2013 16:54:24
libavcodec build number: 3426306
libavcodec version number: 3426306

@ mark4o см. ниже вывод консоли

[root@phpweb ~]# ffmpeg -i Wildlife.wmv -ss 0 -t 15 -acodec copy -vcodec copy  1.wmv 2>&1
FFmpeg version 0.6.5, Copyright (c) 2000-2010 the FFmpeg developers
  built on Jan 29 2012 17:52:15 with gcc 4.4.5 20110214 (Red Hat 4.4.5-6)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdc1394 --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab
  libavutil     50.15. 1 / 50.15. 1
  libavcodec    52.72. 2 / 52.72. 2
  libavformat   52.64. 2 / 52.64. 2
  libavdevice   52. 2. 0 / 52. 2. 0
  libavfilter    1.19. 0 /  1.19. 0
  libswscale     0.11. 0 /  0.11. 0
  libpostproc   51. 2. 0 / 51. 2. 0

Seems stream 1 codec frame rate differs from container frame rate: 1000.00 (1000/1) -> 29.97 (30000/1001)
Input #0, asf, from 'Wildlife.wmv':
  Metadata:
    SfOriginalFPS   : 299
    WMFSDKVersion   : 11.0.6001.7000
    WMFSDKNeeded    : 0.0.0.0000
    IsVBR           : 0
    title           : Wildlife in HD
    author          :
    copyright       : © 2008 Microsoft Corporation
    comment         : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
  Duration: 00:00:30.09, start: 8.000000, bitrate: 6977 kb/s
    Stream #0.0: Audio: wmav2, 44100 Hz, 2 channels, s16, 192 kb/s
    Stream #0.1: Video: vc1, yuv420p, 1280x720, 29.97 tbr, 1k tbn, 1k tbc
File '1.wmv' already exists. Overwrite ? [y/N] y
Output #0, asf, to '1.wmv':
  Metadata:
    WM/EncodingSettings: Lavf52.64.2
    Stream #0.0: Video: WVC1 / 0x31435657, yuv420p, 1280x720, q=2-31, 1k tbn, 1k tbc
    Stream #0.1: Audio: wmav2, 44100 Hz, 2 channels, 192 kb/s
Stream mapping:
  Stream #0.1 -> #0.0
  Stream #0.0 -> #0.1
Press [q] to stop encoding
frame=  901 fps=  0 q=-1.0 Lsize=   25467kB time=15.10 bitrate=13812.4kbits/s

video:24743kB audio:366kB global headers:0kB muxing overhead 1.423340%

Answer 1

Попробуй это

ffmpeg -i Wildlife.wmv -ss 0 -t 15 -c copy 1.wmv 2>&1