diff --git a/libavcodec/dxva2_vc1.c b/libavcodec/dxva2_vc1.c
index f08ac8b5a0..5fd6957d0c 100644
--- a/libavcodec/dxva2_vc1.c
+++ b/libavcodec/dxva2_vc1.c
@@ -22,6 +22,7 @@
 
 #include "dxva2_internal.h"
 #include "mpegutils.h"
+#include "mpegvideodec.h"
 #include "vc1.h"
 #include "vc1data.h"
 
diff --git a/libavcodec/h261dec.c b/libavcodec/h261dec.c
index 17f1067b15..5e732b05bf 100644
--- a/libavcodec/h261dec.c
+++ b/libavcodec/h261dec.c
@@ -31,6 +31,7 @@
 #include "mpeg_er.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "h261.h"
 #include "internal.h"
 
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index bf2e9b1583..df9ac2f831 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -47,6 +47,7 @@
 #endif
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "msmpeg4dec.h"
 #include "qpeldsp.h"
 #include "thread.h"
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index d55a4d2feb..a3a7e86ccf 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -47,6 +47,7 @@
 #include "mpegutils.h"
 #include "mpegvideo.h"
 #include "mpegvideodata.h"
+#include "mpegvideodec.h"
 #include "profiles.h"
 #include "thread.h"
 #include "xvmc_internal.h"
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index a437f233ec..6d7f7f66f9 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -33,6 +33,7 @@
 #include "mpegutils.h"
 #include "mpegvideo.h"
 #include "mpegvideodata.h"
+#include "mpegvideodec.h"
 #include "mpeg4video.h"
 #include "mpeg4videodata.h"
 #include "mpeg4videodec.h"
diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h
index e16f850f30..c4ac7bc966 100644
--- a/libavcodec/mpegvideo.h
+++ b/libavcodec/mpegvideo.h
@@ -44,7 +44,6 @@
 #include "mpegpicture.h"
 #include "mpegvideodsp.h"
 #include "mpegvideoencdsp.h"
-#include "mpegvideodata.h"
 #include "pixblockdsp.h"
 #include "put_bits.h"
 #include "ratecontrol.h"
@@ -586,31 +585,13 @@ int ff_mpv_init_context_frame(MpegEncContext *s);
  */
 void ff_mpv_free_context_frame(MpegEncContext *s);
 
-int ff_mpv_common_frame_size_change(MpegEncContext *s);
 void ff_mpv_common_end(MpegEncContext *s);
 
-/**
- * Initialize the given MpegEncContext for decoding.
- * the changed fields will not depend upon
- * the prior state of the MpegEncContext.
- */
-void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx);
 void ff_mpv_reconstruct_mb(MpegEncContext *s, int16_t block[12][64]);
-void ff_mpv_report_decode_progress(MpegEncContext *s);
-
-int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);
-void ff_mpv_frame_end(MpegEncContext *s);
 
 void ff_clean_intra_table_entries(MpegEncContext *s);
-void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
-void ff_mpeg_flush(AVCodecContext *avctx);
-
-void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict);
-
-int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
 
 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
-int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
 void ff_set_qscale(MpegEncContext * s, int qscale);
 
 void ff_mpv_idct_init(MpegEncContext *s);
@@ -638,13 +619,4 @@ static inline void ff_update_block_index(MpegEncContext *s){
     s->dest[2]+= (2 >> s->chroma_x_shift) * block_size;
 }
 
-static inline int mpeg_get_qscale(MpegEncContext *s)
-{
-    int qscale = get_bits(&s->gb, 5);
-    if (s->q_scale_type)
-        return ff_mpeg2_non_linear_qscale[qscale];
-    else
-        return qscale << 1;
-}
-
 #endif /* AVCODEC_MPEGVIDEO_H */
diff --git a/libavcodec/mpegvideo_dec.c b/libavcodec/mpegvideo_dec.c
index cc23e070ea..b1b15c7fcf 100644
--- a/libavcodec/mpegvideo_dec.c
+++ b/libavcodec/mpegvideo_dec.c
@@ -31,6 +31,7 @@
 #include "internal.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "thread.h"
 
 void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx)
diff --git a/libavcodec/mpegvideodec.h b/libavcodec/mpegvideodec.h
new file mode 100644
index 0000000000..0cda0af733
--- /dev/null
+++ b/libavcodec/mpegvideodec.h
@@ -0,0 +1,67 @@
+/*
+ * MPEGVideo decoders header
+ * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * mpegvideo decoder header.
+ */
+
+#ifndef AVCODEC_MPEGVIDEODEC_H
+#define AVCODEC_MPEGVIDEODEC_H
+
+#include "libavutil/frame.h"
+#include "avcodec.h"
+#include "get_bits.h"
+#include "mpegpicture.h"
+#include "mpegvideo.h"
+#include "mpegvideodata.h"
+
+/**
+ * Initialize the given MpegEncContext for decoding.
+ * the changed fields will not depend upon
+ * the prior state of the MpegEncContext.
+ */
+void ff_mpv_decode_init(MpegEncContext *s, AVCodecContext *avctx);
+
+int ff_mpv_common_frame_size_change(MpegEncContext *s);
+
+int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);
+void ff_mpv_report_decode_progress(MpegEncContext *s);
+void ff_mpv_frame_end(MpegEncContext *s);
+
+int ff_mpv_export_qp_table(MpegEncContext *s, AVFrame *f, Picture *p, int qp_type);
+int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
+void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
+void ff_mpeg_flush(AVCodecContext *avctx);
+
+void ff_print_debug_info(MpegEncContext *s, Picture *p, AVFrame *pict);
+
+static inline int mpeg_get_qscale(MpegEncContext *s)
+{
+    int qscale = get_bits(&s->gb, 5);
+    if (s->q_scale_type)
+        return ff_mpeg2_non_linear_qscale[qscale];
+    else
+        return qscale << 1;
+}
+
+#endif /* AVCODEC_MPEGVIDEODEC_H */
diff --git a/libavcodec/mss2.c b/libavcodec/mss2.c
index dcf91f9828..65decf0a3c 100644
--- a/libavcodec/mss2.c
+++ b/libavcodec/mss2.c
@@ -27,6 +27,7 @@
 #include "error_resilience.h"
 #include "internal.h"
 #include "mpeg_er.h"
+#include "mpegvideodec.h"
 #include "msmpeg4dec.h"
 #include "qpeldsp.h"
 #include "vc1.h"
diff --git a/libavcodec/rv10.c b/libavcodec/rv10.c
index 241ee53442..26cb9a2294 100644
--- a/libavcodec/rv10.c
+++ b/libavcodec/rv10.c
@@ -39,6 +39,7 @@
 #include "mpeg_er.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "mpeg4video.h"
 #include "mpegvideodata.h"
 #include "rv10dec.h"
diff --git a/libavcodec/rv30.c b/libavcodec/rv30.c
index d11b8430e7..c84e09dd1a 100644
--- a/libavcodec/rv30.c
+++ b/libavcodec/rv30.c
@@ -28,6 +28,7 @@
 #include "internal.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "golomb.h"
 
 #include "rv34.h"
diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c
index e68072de06..bfef5f84cc 100644
--- a/libavcodec/rv34.c
+++ b/libavcodec/rv34.c
@@ -35,6 +35,7 @@
 #include "error_resilience.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "golomb.h"
 #include "internal.h"
 #include "mathops.h"
diff --git a/libavcodec/rv40.c b/libavcodec/rv40.c
index 0b3f733bc6..9cec0751e1 100644
--- a/libavcodec/rv40.c
+++ b/libavcodec/rv40.c
@@ -32,6 +32,7 @@
 #include "internal.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "golomb.h"
 
 #include "rv34.h"
diff --git a/libavcodec/vaapi_mpeg2.c b/libavcodec/vaapi_mpeg2.c
index 26e0cd827c..2c27986490 100644
--- a/libavcodec/vaapi_mpeg2.c
+++ b/libavcodec/vaapi_mpeg2.c
@@ -23,6 +23,7 @@
 #include "hwconfig.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "internal.h"
 #include "vaapi_decode.h"
 
diff --git a/libavcodec/vaapi_mpeg4.c b/libavcodec/vaapi_mpeg4.c
index 6800499c85..94f31dd026 100644
--- a/libavcodec/vaapi_mpeg4.c
+++ b/libavcodec/vaapi_mpeg4.c
@@ -25,6 +25,7 @@
 #include "internal.h"
 #include "mpeg4videodec.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "vaapi_decode.h"
 
 /** Reconstruct bitstream intra_dc_vlc_thr */
diff --git a/libavcodec/vaapi_vc1.c b/libavcodec/vaapi_vc1.c
index 4e9607d9be..0ae5a65fb2 100644
--- a/libavcodec/vaapi_vc1.c
+++ b/libavcodec/vaapi_vc1.c
@@ -22,6 +22,7 @@
 
 #include "hwconfig.h"
 #include "internal.h"
+#include "mpegvideodec.h"
 #include "vaapi_decode.h"
 #include "vc1.h"
 #include "vc1data.h"
diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c
index c922efe4c8..119df4081d 100644
--- a/libavcodec/vc1_block.c
+++ b/libavcodec/vc1_block.c
@@ -29,6 +29,7 @@
 #include "avcodec.h"
 #include "mpegutils.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "msmpeg4data.h"
 #include "unary.h"
 #include "vc1.h"
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 89cccc1929..700c787d99 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -33,6 +33,7 @@
 #include "internal.h"
 #include "mpeg_er.h"
 #include "mpegvideo.h"
+#include "mpegvideodec.h"
 #include "msmpeg4data.h"
 #include "msmpeg4dec.h"
 #include "profiles.h"
diff --git a/libavcodec/vdpau.c b/libavcodec/vdpau.c
index f96ac15e2a..5072071c70 100644
--- a/libavcodec/vdpau.c
+++ b/libavcodec/vdpau.c
@@ -26,6 +26,7 @@
 #include "avcodec.h"
 #include "decode.h"
 #include "internal.h"
+#include "mpegvideodec.h"
 #include "vc1.h"
 #include "vdpau.h"
 #include "vdpau_internal.h"
