我无法将视频文件转码为 webm,因为我的机器无法找到 libvorbis。当我运行以下命令时:
ffmpeg -y -i /public/uploads/tmp/1382112521-11953-7661/webm_Untitled.mov -vcodec libvpx -acodec libvorbis -s 640x360 -b 1500k -ab 160000 -f webm -g 30 -aspect 1.7777777777777777 /public/uploads/tmp/1382112521-11953-7661/tmpfile.webm
我得到错误
Unknown encoder 'libvorbis'
不过,我已经在我的机器上安装了 libvorbis(当我尝试“brew install libvorbis”时,它告诉我:警告:libvorbis-1.3.3 已经安装)。
我怎么解决这个问题?
这是完整的日志:
ffmpeg -y -i /public/uploads/tmp/1382112521-11953-7661/webm_Untitled.mov -vcodec libvpx -acodec libvorbis -s 640x360 -b 1500k -ab 160000 -f webm -g 30 -aspect 1.7777777777777777 /public/uploads/tmp/1382112521-11953-7661/tmpfile.webm
ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Oct 18 2013 12:20:19 with Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libvpx
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/public/uploads/tmp/1382112521-11953-7661/webm_Untitled.mov':
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2013-09-27 20:08:57
Duration: 00:00:02.14, start: 0.000000, bitrate: 17460 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 17292 kb/s, 29.88 fps, 29.83 tbr, 90k tbn, 180k tbc
Metadata:
creation_time : 2013-09-27 20:08:57
handler_name : Core Media Data Handler
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 123 kb/s
Metadata:
creation_time : 2013-09-27 20:08:57
handler_name : Core Media Data Handler
Please use -b:a or -b:v, -b is ambiguous
Unknown encoder 'libvorbis'