• Compression Techniques

  Webm Error

  Posted by Ben James on January 27, 2011 at 11:11 am

  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,

  Kit

  Michael Rampe replied 15 years, 7 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Michael Rampe

  January 27, 2011 at 8:56 pm

  [Kit Carrau] “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″”

  Have you tried specifying the codec rather than relying on FFmpeg choosing based on output container?

  Example: -vcodec libvpx -b 1500k

  Michael

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