diff --git a/downloader/src/error.rs b/downloader/src/error.rs
index 8970dd4..9e9d84c 100644
--- a/downloader/src/error.rs
+++ b/downloader/src/error.rs
@@ -25,8 +25,8 @@ pub enum DownloadError {
     #[error("Progressive download error: {0}")]
     Progressive(Cow<'static, str>),
     /// Video could not be downloaded because of invalid player data
-    #[error("input error: {0}")]
-    Input(Cow<'static, str>),
+    #[error("source error: {0}")]
+    Source(Cow<'static, str>),
     /// Download target already exists
     #[error("file {0} already exists")]
     Exists(PathBuf),
diff --git a/downloader/src/lib.rs b/downloader/src/lib.rs
index 7bcbdd1..6bf238d 100644
--- a/downloader/src/lib.rs
+++ b/downloader/src/lib.rs
@@ -801,9 +801,9 @@ impl DownloadQuery {
 
         if video.is_none() && audio.is_none() {
             if player_data.drm.is_some() {
-                return Err(DownloadError::Input("video is DRM-protected".into()));
+                return Err(DownloadError::Source("video is DRM-protected".into()));
             }
-            return Err(DownloadError::Input("no stream found".into()));
+            return Err(DownloadError::Source("no stream found".into()));
         }
 
         let extension = match video {
@@ -812,7 +812,9 @@ impl DownloadQuery {
                 Some(audio) => match audio.codec {
                     AudioCodec::Mp4a => "m4a",
                     AudioCodec::Opus => "opus",
-                    _ => return Err(DownloadError::Input("unknown audio codec".into())),
+                    AudioCodec::Ac3 => "ac3",
+                    AudioCodec::Ec3 => "eac3",
+                    _ => return Err(DownloadError::Source("unknown audio codec".into())),
                 },
                 None => unreachable!(),
             },
@@ -903,7 +905,7 @@ impl DownloadQuery {
 
         // Tag audio file
         #[cfg(feature = "audiotag")]
-        if self.dl.i.audio_tag && video.is_none() {
+        if self.dl.i.audio_tag && video.is_none() && matches!(extension, "m4a" | "opus") {
             let (details, track) = match details {
                 Some(d) => (d, self.dl.i.rp.query().music_details(&self.video.id).await?),
                 None => {