ffmpeg unable to find encoder 'libvorbis'

Question

I'm unable to transcode a video file to webm because my machine isn't able to find libvorbis. When I run the following command:

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 

I get the error

Unknown encoder 'libvorbis' 

I already have libvorbis installed on my machine, though (When I try "brew install libvorbis, it tells me: Warning: libvorbis-1.3.3 already installed).

How can I solve this problem?

Here is the full log:

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' 

Answer 1

Edit 2020:

Homebrew now installs libvorbis by default, so you can just run:

brew install ffmpeg 

---

If you're using Homebrew, try this:

brew install ffmpeg --with-libvorbis 

...or, if you've already tried installing ffmpeg with Homebrew...

brew reinstall ffmpeg --with-libvorbis 

If you want libvpx, too:

brew reinstall ffmpeg --with-libvpx --with-libvorbis