diff --git a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
index 764230feb..7091d5153 100644
--- a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
@@ -598,7 +598,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
             {
                 try
                 {
-                    return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, true, targetFormat, cancellationToken).ConfigureAwait(false);
+                    return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, true, targetFormat, false, cancellationToken).ConfigureAwait(false);
                 }
                 catch (ArgumentException)
                 {
@@ -610,7 +610,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
                 }
             }
 
-            return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, false, targetFormat, cancellationToken).ConfigureAwait(false);
+            return await ExtractImageInternal(inputArgument, container, videoStream, imageStreamIndex, threedFormat, offset, false, targetFormat, isAudio, cancellationToken).ConfigureAwait(false);
         }
 
         private string GetImageResolutionParameter()
@@ -636,7 +636,17 @@ namespace MediaBrowser.MediaEncoding.Encoder
             return imageResolutionParameter;
         }
 
-        private async Task<string> ExtractImageInternal(string inputPath, string container, MediaStream videoStream, int? imageStreamIndex, Video3DFormat? threedFormat, TimeSpan? offset, bool useIFrame, ImageFormat? targetFormat, CancellationToken cancellationToken)
+        private async Task<string> ExtractImageInternal(
+            string inputPath,
+            string container,
+            MediaStream videoStream,
+            int? imageStreamIndex,
+            Video3DFormat? threedFormat,
+            TimeSpan? offset,
+            bool useIFrame,
+            ImageFormat? targetFormat,
+            bool isAudio,
+            CancellationToken cancellationToken)
         {
             ArgumentException.ThrowIfNullOrEmpty(inputPath);
 
@@ -701,7 +711,7 @@ namespace MediaBrowser.MediaEncoding.Encoder
 
             var vf = string.Join(',', filters);
             var mapArg = imageStreamIndex.HasValue ? (" -map 0:" + imageStreamIndex.Value.ToString(CultureInfo.InvariantCulture)) : string.Empty;
-            var args = string.Format(CultureInfo.InvariantCulture, "-i {0}{3} -threads {4} -v quiet -vframes 1 -vf {2}{5} -f image2 \"{1}\"", inputPath, tempExtractPath, vf, mapArg, _threads, GetImageResolutionParameter());
+            var args = string.Format(CultureInfo.InvariantCulture, "-i {0}{3} -threads {4} -v quiet -vframes 1 -vf {2}{5} -f image2 \"{1}\"", inputPath, tempExtractPath, vf, mapArg, _threads, isAudio ? string.Empty : GetImageResolutionParameter());
 
             if (offset.HasValue)
             {