logstash.conf

input {
  stdin {
    type => "stdin-type"
  }

#file {
#  type => "syslog"
#  path => [ "/var/log/*.log", "/var/log/messages", "/var/log/syslog" ]
#  start_position => "beginning"
#}

  file {
    type => "couchpotato"
    path => [ "/logs/couchpotato/CouchPotato.*" ]
    start_position => "beginning"
  
    # Combine tracebacks into one event
    codec => multiline {
      pattern => "^%{MONTHNUM}-%{MONTHDAY} %{TIME} %{LOGLEVEL}"
      negate => true
      what => previous
    }
  }

}

filter {
  # Get rid of color codes
  mutate {
    gsub => [ "message", "\e\[0m", ""]
  }

  grok {
    # 09-04 20:48:55 INFO [ie.providers.info.omdbapi] Found: Only Lovers Left Alive (2013)
    match => [ "message", "%{MONTHNUM}-%{MONTHDAY} %{TIME} %{LOGLEVEL} \[(?:%{SPACE})%{NOTSPACE:module}\] %{GREEDYDATA:couch_message}" ]
  }
}

output {
  elasticsearch {
    embedded => true
  }
}

I used this updated pattern to catch both:

pattern => [ "%{MONTHNUM}-%{MONTHDAY} %{TIME} %{LOGLEVEL} \[(?:%{SPACE})%{NOTSPACE:module}\] %{GREEDYDATA:couch_message}" ]

09-04 19:54:28 INFO \e[0m[  couchpotato.core.loader] Loaded media_movie_providers_userscript: reddit\e[0m
{
          "message" => "09-04 19:54:28 INFO [  couchpotato.core.loader] Loaded media_movie_providers_userscript: reddit",
         "@version" => "1",
       "@timestamp" => "2014-09-05T20:19:16.092Z",
             "host" => "aironaut.untergeek.net",
           "module" => "couchpotato.core.loader",
    "couch_message" => "Loaded media_movie_providers_userscript: reddit"
}
09-04 20:48:55 INFO [ie.providers.info.omdbapi] Found: Only Lovers Left Alive (2013)
{
          "message" => "09-04 20:48:55 INFO [ie.providers.info.omdbapi] Found: Only Lovers Left Alive (2013)",
         "@version" => "1",
       "@timestamp" => "2014-09-05T20:19:26.215Z",
             "host" => "aironaut.untergeek.net",
           "module" => "ie.providers.info.omdbapi",
    "couch_message" => "Found: Only Lovers Left Alive (2013)"

Thanks @untergeek! This was driving me crazy :-)