diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index 4fc0e3dbb0..b33677a2c8 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -266,7 +266,7 @@ static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len
     return 0;
 }
 
-static int asf_read_value(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
+static int asf_read_value(AVFormatContext *s, const uint8_t *name,
                           uint16_t val_len, int type, AVDictionary **met)
 {
     int ret;
@@ -331,7 +331,7 @@ static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
 }
 
 static int asf_set_metadata(AVFormatContext *s, const uint8_t *name,
-                            uint16_t name_len, int type, AVDictionary **met)
+                            int type, AVDictionary **met)
 {
     AVIOContext *pb = s->pb;
     uint64_t value;
@@ -451,7 +451,7 @@ fail:
     return ret;
 }
 
-static void get_id3_tag(AVFormatContext *s, int len)
+static void get_id3_tag(AVFormatContext *s)
 {
     ID3v2ExtraMeta *id3v2_extra_meta = NULL;
 
@@ -470,21 +470,21 @@ static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t na
     if (val_len) {
         switch (type) {
         case ASF_UNICODE:
-            asf_read_value(s, name, name_len, val_len, type, met);
+            asf_read_value(s, name, val_len, type, met);
             break;
         case ASF_BYTE_ARRAY:
             if (!strcmp(name, "WM/Picture")) // handle cover art
                 asf_read_picture(s, val_len);
             else if (!strcmp(name, "ID3")) // handle ID3 tag
-                get_id3_tag(s, val_len);
+                get_id3_tag(s);
             else
-                asf_read_value(s, name, name_len, val_len, type, met);
+                asf_read_value(s, name, val_len, type, met);
             break;
         case ASF_GUID:
             ff_get_guid(s->pb, &guid);
             break;
         default:
-            if ((ret = asf_set_metadata(s, name, name_len, type, met)) < 0)
+            if ((ret = asf_set_metadata(s, name, type, met)) < 0)
                 return ret;
             break;
         }
@@ -1208,8 +1208,7 @@ static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
     return 0;
 }
 
-static int asf_read_single_payload(AVFormatContext *s, AVPacket *pkt,
-                               ASFPacket *asf_pkt)
+static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
 {
     ASFContext *asf = s->priv_data;
     AVIOContext *pb = s->pb;
@@ -1315,7 +1314,7 @@ static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
             if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
                 return ret;
         } else {
-            if ((ret = asf_read_single_payload(s, pkt, asf_pkt)) < 0)
+            if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
                 return ret;
         }
     } else {