diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c
index d97ffd5e62..9f1187efe7 100644
--- a/libavformat/aviobuf.c
+++ b/libavformat/aviobuf.c
@@ -23,6 +23,7 @@
 #include "libavutil/intreadwrite.h"
 #include "avformat.h"
 #include "avio.h"
+#include "internal.h"
 #include <stdarg.h>
 
 #define IO_BUFFER_SIZE 32768
@@ -248,6 +249,24 @@ void put_strz(ByteIOContext *s, const char *str)
         put_byte(s, 0);
 }
 
+int ff_get_v_length(uint64_t val){
+    int i=1;
+
+    while(val>>=7)
+        i++;
+
+    return i;
+}
+
+void ff_put_v(ByteIOContext *bc, uint64_t val){
+    int i= ff_get_v_length(val);
+
+    while(--i>0)
+        put_byte(bc, 128 | (val>>(7*i)));
+
+    put_byte(bc, val&127);
+}
+
 void put_le64(ByteIOContext *s, uint64_t val)
 {
     put_le32(s, (uint32_t)(val & 0xffffffff));
diff --git a/libavformat/internal.h b/libavformat/internal.h
index 6ff28d3fad..9b68e9e49d 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -157,4 +157,14 @@ void ff_sdp_write_media(char *buff, int size, AVCodecContext *c,
 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
                      AVFormatContext *src);
 
+/**
+ * Get the length in bytes which is needed to store val as v.
+ */
+int ff_get_v_length(uint64_t val);
+
+/**
+ * Put val using a variable number of bytes.
+ */
+void ff_put_v(ByteIOContext *bc, uint64_t val);
+
 #endif /* AVFORMAT_INTERNAL_H */
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index 082d6d5ecc..87a7900b4b 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -241,27 +241,6 @@ static void build_frame_code(AVFormatContext *s){
     nut->frame_code['N'].flags= FLAG_INVALID;
 }
 
-/**
- * Get the length in bytes which is needed to store val as v.
- */
-static int ff_get_v_length(uint64_t val){
-    int i=1;
-
-    while(val>>=7)
-        i++;
-
-    return i;
-}
-
-static void ff_put_v(ByteIOContext *bc, uint64_t val){
-    int i= ff_get_v_length(val);
-
-    while(--i>0)
-        put_byte(bc, 128 | (val>>(7*i)));
-
-    put_byte(bc, val&127);
-}
-
 static void put_tt(NUTContext *nut, StreamContext *nus, ByteIOContext *bc, uint64_t val){
     val *= nut->time_base_count;
     val += nus->time_base - nut->time_base;