Legacy ImageMagick Discussions Archive

Hi everyone,

I'm using the convert command to generate thumbnails for certain files (both images and videos).

For instance This works by delegating the request to ffmpeg. Unfortunately, it appears to be tied to the input extension. For example, the following will throw an error:
If I were to rename the file extension from mkv to mov, the command would be executed successfully, generating the file. So the file is supported, except that imagemagick, doesn't know it.

I'm unsure on how to proceed. Is there a flag to force the ffmpeg delegation for certain file extensions? Or is there a way to register certain file extensions as supported?

Try this:

• convert mpeg:some-file.mkv[0] output.png

This worked great. Thank you!