用FFMPEG将.mp4转换为.webm

Question

如果有人能帮我把它变成2或3通命令的话：

使用"FFmpeg Win64静态构建由凯尔施瓦兹，编译于:2012年9月19日16:31:43“在命令提示符的Windows7(x64)。我是FFMPEG的新手，并试图将我的网站的视频从.mp4转换为.webm (在AdobePremiereProCS6中编辑和混合的视频，然后从.mts Canon HXG10录制到.mp4 )。原始视频文件为1080 p质量。

c:\ff/ffmpeg -i c：\ff/xx.mp4 -codec:v libvpx -quality好-cpu-使用0 -b:v 7000 k -qmin 10 -qmax 42 -maxrate 500 k -bufsize 1500 k -threads 8 -vf scale=-1:1080 -codec:a libvorbis -b:a 192 k -f webm c:\ff/xxx.webm

Answer 1

当'1通过‘的折叠作品为我在建设包括vorbis，libvpx.

有关第2次传递的提示，请参见这里

rob@ Pictures$ ffmpeg -y -i me939371029.mp4 -r 30  out3.webm

ffmpeg version git-2012-08-29-85c8303 Copyright (c) 2000-2012 the FFmpeg developers
  built on Aug 29 2012 08:59:14 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --enable-gpl --enable-libfaac --enable-libfdk-aac --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --enable-version3
  libavutil      51. 70.100 / 51. 70.100
  libavcodec     54. 54.100 / 54. 54.100
  libavformat    54. 25.104 / 54. 25.104
  libavdevice    54.  2.100 / 54.  2.100
  libavfilter     3. 14.100 /  3. 14.100
  libswscale      2.  1.101 /  2.  1.101
  libswresample   0. 15.100 /  0. 15.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'me939371029.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.22.100
  Duration: 00:00:08.01, start: 0.000000, bitrate: 343 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p, 1296x972 [SAR 1:1 DAR 4:3], 316 kb/s, 0.57 fps, 0.50 tbr, 1 tbn, 1 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, s16, 64 kb/s
    Metadata:
      handler_name    : SoundHandler
[libvpx @ 0x1e7f500] v1.1.0
Output #0, webm, to 'out3.webm':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf54.25.104
    Stream #0:0(und): Video: vp8, yuv420p, 1296x972 [SAR 1:1 DAR 4:3], q=-1--1, 200 kb/s, 1k tbn, 30 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(eng): Audio: vorbis, 44100 Hz, mono, flt
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libvpx)
  Stream #0:1 -> #0:1 (aac -> libvorbis)
Press [q] to stop, [?] for help
[libvorbis @ 0x1e67060] Que input is backward in time
frame=    4 fps=0.0 q=0.0 Lsize=     122kB time=00:00:07.99 bitrate= 124.6kbits/s    
video:51kB audio:63kB subtitle:0 global headers:3kB muxing overhead 3.241658%