diff --git a/libavformat/crc.c b/libavformat/crc.c
index d28a87cdf5..63eaf1bcdb 100644
--- a/libavformat/crc.c
+++ b/libavformat/crc.c
@@ -56,6 +56,7 @@ unsigned long update_adler32(unsigned long adler, const uint8_t *buf, unsigned i
     }
     return (s2 << 16) | s1;
 }
+#ifdef CONFIG_MUXERS
 
 typedef struct CRCState {
     uint32_t crcval;
@@ -132,3 +133,4 @@ int crc_init(void)
     av_register_output_format(&framecrc_format);
     return 0;
 }
+#endif /* CONFIG_MUXERS */
diff --git a/libavformat/dv.c b/libavformat/dv.c
index 3124c80699..0cf967bb5d 100644
--- a/libavformat/dv.c
+++ b/libavformat/dv.c
@@ -907,6 +907,7 @@ static int dv_read_close(AVFormatContext *s)
     return 0;
 }
 
+#ifdef CONFIG_MUXERS
 static int dv_write_header(AVFormatContext *s)
 {
     s->priv_data = dv_init_mux(s);
@@ -944,6 +945,7 @@ static int dv_write_trailer(struct AVFormatContext *s)
     dv_delete_mux((DVMuxContext *)s->priv_data);
     return 0;
 }
+#endif /* CONFIG_MUXERS */
 
 static AVInputFormat dv_iformat = {
     "dv",
@@ -957,6 +959,7 @@ static AVInputFormat dv_iformat = {
     .extensions = "dv,dif",
 };
 
+#ifdef CONFIG_MUXERS
 static AVOutputFormat dv_oformat = {
     "dv",
     "DV video format",
@@ -969,10 +972,13 @@ static AVOutputFormat dv_oformat = {
     dv_write_packet,
     dv_write_trailer,
 };
+#endif
 
 int ff_dv_init(void)
 {
     av_register_input_format(&dv_iformat);
+#ifdef CONFIG_MUXERS
     av_register_output_format(&dv_oformat);
+#endif
     return 0;
 }
diff --git a/libavformat/img2.c b/libavformat/img2.c
index 46d8248017..e38c694fc5 100644
--- a/libavformat/img2.c
+++ b/libavformat/img2.c
@@ -291,6 +291,7 @@ static int img_read_close(AVFormatContext *s1)
     return 0;
 }
 
+#ifdef CONFIG_MUXERS
 /******************************************************/
 /* image output */
 
@@ -360,6 +361,8 @@ static int img_write_trailer(AVFormatContext *s)
     return 0;
 }
 
+#endif /* CONFIG_MUXERS */
+
 /* input */
 
 static AVInputFormat image2_iformat = {
@@ -387,6 +390,7 @@ static AVInputFormat image2pipe_iformat = {
 };
 
 
+#ifdef CONFIG_MUXERS
 /* output */
 
 static AVOutputFormat image2_oformat = {
@@ -415,14 +419,17 @@ static AVOutputFormat image2pipe_oformat = {
     img_write_packet,
     img_write_trailer,
 };
+#endif /* CONFIG_MUXERS */
 
 int img2_init(void)
 {
     av_register_input_format(&image2_iformat);
-    av_register_output_format(&image2_oformat);
-
     av_register_input_format(&image2pipe_iformat);
+
+#ifdef CONFIG_MUXERS
+    av_register_output_format(&image2_oformat);
     av_register_output_format(&image2pipe_oformat);
+#endif
 
     return 0;
 }