FFmpeg Webm Error

[carrau]

Hi,

I am trying to convert video files to the webm format. I am using
FFmpeg and have installed the libvpx library. I can confirm this when
I run the following:

$ ./ffmpeg -formats 2> /dev/null | grep WebM
E webm WebM file format

$ ./ffmpeg -codecs 2> /dev/null | grep libvpx
DEV libvpx libvpx VP8

Which means I should be able to convert to webm? However when I run
"ffmpeg -i [input.mp4] [output.webm]", I get the following error:

"Encoder (codec id 146) not found for output stream #0.0"

Has anyone got any ideas?

Many Thanks.

[bat999]

Hi
When I run the same grep commands I get similar results:-

x@ubuntu:~$ ffmpeg -formats 2> /dev/null | grep WebM
 D  matroska,webm   Matroska/WebM file format
  E webm            WebM file format

x@ubuntu:~$ ffmpeg -codecs 2> /dev/null | grep libvpx
 DEV    libvpx          libvpx VP8

And it converts OK with your command:-

 ffmpeg -i input.mp4 output.webm

And the result is the same if I use command:-

 ffmpeg -i input.mp4 -vcodec libvpx -acodec libvorbis output.webm

So maybe there is something wrong with your libvpx compilation/installation.

Try testing libvpx and libvorbis individually.
Like this:-

ffmpeg -i input.mp4 -vcodec libvpx -an output.mkv

and this:

ffmpeg -i input.mp4 -acodec libvorbis -vn output.mka

Complete name                    : output.webm
Format                           : WebM
File size                        : 7.20 MiB
Duration                         : 3mn 0s
Overall bit rate                 : 335 Kbps
Writing application              : Lavf52.92.0
Writing library                  : Lavf52.92.0

Video
ID                               : 1
Format                           : VP8
Codec ID                         : V_VP8
Duration                         : 3mn 0s
Bit rate                         : 249 Kbps
Width                            : 480 pixels
Height                           : 272 pixels
Display aspect ratio             : 16:9
Frame rate                       : 25.025 fps
Compression mode                 : Lossy
Bits/(Pixel*Frame)               : 0.076
Stream size                      : 5.35 MiB (74%)
Language                         : English / English

Audio
ID                               : 2
Format                           : Vorbis
Format settings, Floor           : 1
Codec ID                         : A_VORBIS
Duration                         : 3mn 0s
Bit rate                         : 64.0 Kbps
Channel(s)                       : 2 channels
Sampling rate                    : 44.1 KHz
Bit depth                        : 16 bits
Compression mode                 : Lossy
Stream size                      : 1.37 MiB (19%)
Writing library                  : aoTuV b5d  (UTC 2009-03-01)
Language                         : English / English

[carrau]

Hi bat999,

Thank you for the reply. I have been able to get it work. I completely removed ffmpeg and started again. I think the main issue was that I was trying to install libvpx library after ffmpeg was installed first.

Thank you again!