diff --git a/libavcodec/bmvvideo.c b/libavcodec/bmvvideo.c
index f4b8f29f55..4fb42f0f5c 100644
--- a/libavcodec/bmvvideo.c
+++ b/libavcodec/bmvvideo.c
@@ -191,7 +191,6 @@ static int decode_bmv_frame(const uint8_t *source, int src_len, uint8_t *frame,
         if (dst == dst_end)
             return 0;
     }
-    return 0;
 }
 
 static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c
index 8865cecded..8c913f93a7 100644
--- a/libavcodec/hevc_sei.c
+++ b/libavcodec/hevc_sei.c
@@ -173,7 +173,6 @@ static int decode_nal_sei_message(HEVCContext *s)
     } else { /* nal_unit_type == NAL_SEI_SUFFIX */
         return decode_nal_sei_suffix(s, payload_type, payload_size);
     }
-    return 0;
 }
 
 static int more_rbsp_data(GetBitContext *gb)
diff --git a/libavcodec/indeo3.c b/libavcodec/indeo3.c
index 89c11e6346..314548f99a 100644
--- a/libavcodec/indeo3.c
+++ b/libavcodec/indeo3.c
@@ -831,8 +831,6 @@ static int parse_bintree(Indeo3DecodeContext *ctx, AVCodecContext *avctx,
             break;
         }
     }//while
-
-    return 0;
 }
 
 
diff --git a/libavcodec/sanm.c b/libavcodec/sanm.c
index 3d231957ae..7b0004925c 100644
--- a/libavcodec/sanm.c
+++ b/libavcodec/sanm.c
@@ -926,13 +926,10 @@ static int process_frame_obj(SANMVideoContext *ctx)
     case 1:
     case 3:
         return old_codec1(ctx, top, left, w, h);
-        break;
     case 37:
         return old_codec37(ctx, top, left, w, h);
-        break;
     case 47:
         return old_codec47(ctx, top, left, w, h);
-        break;
     default:
         avpriv_request_sample(ctx->avctx, "Subcodec %d", codec);
         return AVERROR_PATCHWELCOME;
diff --git a/libavformat/rtpproto.c b/libavformat/rtpproto.c
index 6582e4ad76..21a96d217d 100644
--- a/libavformat/rtpproto.c
+++ b/libavformat/rtpproto.c
@@ -436,7 +436,6 @@ static int rtp_read(URLContext *h, uint8_t *buf, int size)
         if (h->flags & AVIO_FLAG_NONBLOCK)
             return AVERROR(EAGAIN);
     }
-    return len;
 }
 
 static int rtp_write(URLContext *h, const uint8_t *buf, int size)
diff --git a/libavformat/rtspdec.c b/libavformat/rtspdec.c
index 03374dc0e6..8e8b3403e5 100644
--- a/libavformat/rtspdec.c
+++ b/libavformat/rtspdec.c
@@ -700,7 +700,6 @@ static int rtsp_listen(AVFormatContext *s)
             return AVERROR_INVALIDDATA;
         }
     }
-    return 0;
 }
 
 static int rtsp_probe(AVProbeData *p)
diff --git a/libavformat/smush.c b/libavformat/smush.c
index 262b941241..817e736bf7 100644
--- a/libavformat/smush.c
+++ b/libavformat/smush.c
@@ -129,7 +129,6 @@ static int smush_read_header(AVFormatContext *ctx)
                 break;
             default:
                 return AVERROR_INVALIDDATA;
-                break;
             }
         }
 
diff --git a/libavutil/opt.c b/libavutil/opt.c
index 7cb3d66557..44d6299117 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -240,8 +240,6 @@ static int set_string_number(void *obj, void *target_obj, const AVOption *o, con
             return 0;
         notfirst = 1;
     }
-
-    return 0;
 }
 
 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)