Error installing gem,

[LWFlouisa]

I seem to get this error when I try to install the gem:

Does it have to do with my ruby version?

ERROR:  Error installing speech2text:
	ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.5.0/gems/curb-0.9.10/ext
/usr/bin/ruby2.5 -r ./siteconf20190612-7818-160o3dn.rb extconf.rb
checking for curl-config... no
checking for -lcurl... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers.  Check the mkmf.log file for more details.  You may
need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/usr/bin/$(RUBY_BASE_NAME)2.5
	--with-curl-dir
	--without-curl-dir
	--with-curl-include
	--without-curl-include=${curl-dir}/include
	--with-curl-lib
	--without-curl-lib=${curl-dir}/lib
	--with-curllib
	--without-curllib
extconf.rb:18:in `<main>':   Can't find libcurl or curl/curl.h (RuntimeError)

  Try passing --with-curl-dir or --with-curl-lib and --with-curl-include
  options to extconf.

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/curb-0.9.10/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.5.0/gems/curb-0.9.10 for inspection.
Results logged to /var/lib/gems/2.5.0/extensions/x86_64-linux/2.5.0/curb-0.9.10/gem_make.out

[LWFlouisa]

Also I installed everything I needed to, for FFMPEG. I still get the error.

[ErwanDelhoveUCL]

I had the same problem.
So I checked the mkmf.log file which said that -lcurl was not found.
After looking a bit online, I found that I had to install a library called "libcurl3-dev".
Even my linux decides to install libcurl4-openssl-dev instead of this one it didn't prevent me from successfully install the gem on my machine.