相关疑难解决方法(0)

当我ffmpeg在Ubuntu上运行时,它显示:

$ ffmpeg 
ffmpeg version v0.8, Copyright (c) 2000-2011 the Libav developers
  built on Feb 28 2012 13:27:36 with gcc 4.6.1
This program is not developed anymore and is only provided for compatibility. Use avconv instead (see Changelog for the list of incompatible changes).

或者它显示(取决于Ubuntu版本):

$ ffmpeg
ffmpeg version 0.8.5-6:0.8.5-0ubuntu0.12.10.1, Copyright (c) 2000-2012 the Libav developers
  built on Jan 24 2013 14:49:20 with gcc 4.7.2
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility …

我有xp,因为我不熟悉编译我下载的winf-static版本的ffmpeg,svn-r26251.我想调整mp4(最初的1280x720)视频的大小,以获得更小的文件大小,质量大致相同.我的命令是:

ffmpeg -i ma.mp4 -vcodec libx264 -vpre hq -s 640x360 ma2.mp4

但是它说"未找到'预设'文件的文件".我试过-fpre,没有任何区别.如果没有libx264,生成的文件ma2.mp4将无法在jwplayer中播放,您只需听到音频.(原因是它不是"mpeg4(h264)",它只是"mpeg4").我该怎么办？