diff --git a/FlowPlugins/CommunityFlowPlugins/ffmpegCommand/ffmpegCommandEnsureAudioStream/1.0.0/index.js b/FlowPlugins/CommunityFlowPlugins/ffmpegCommand/ffmpegCommandEnsureAudioStream/1.0.0/index.js
index b3ff0eb..ffaf341 100644
--- a/FlowPlugins/CommunityFlowPlugins/ffmpegCommand/ffmpegCommandEnsureAudioStream/1.0.0/index.js
+++ b/FlowPlugins/CommunityFlowPlugins/ffmpegCommand/ffmpegCommandEnsureAudioStream/1.0.0/index.js
@@ -27,6 +27,7 @@ var details = function () { return ({
                     'eac3',
                     'dca',
                     'flac',
+                    'libopus',
                     'mp2',
                     'libmp3lame',
                     'truehd',
@@ -148,6 +149,9 @@ var plugin = function (args) {
     if (audioEncoder === 'libmp3lame') {
         audioCodec = 'mp3';
     }
+    if (audioEncoder === 'libopus') {
+        audioCodec = 'opus';
+    }
     var addedOrExists = attemptMakeStream({
         args: args,
         langTag: langTag,
diff --git a/FlowPlugins/CommunityFlowPlugins/video/checkVideoCodec/1.0.0/index.js b/FlowPlugins/CommunityFlowPlugins/video/checkVideoCodec/1.0.0/index.js
index 9eb963c..bd96c7c 100644
--- a/FlowPlugins/CommunityFlowPlugins/video/checkVideoCodec/1.0.0/index.js
+++ b/FlowPlugins/CommunityFlowPlugins/video/checkVideoCodec/1.0.0/index.js
@@ -33,8 +33,7 @@ var details = function () { return ({
                     'mpeg2video',
                     'mjpeg',
                     'flv',
-                    'mpeg4',
-                    'theora'
+                    'theora',
                 ],
             },
             tooltip: 'Specify the codec check for',