diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c
index afd2d779db..6324e9be87 100644
--- a/libavcodec/h263dec.c
+++ b/libavcodec/h263dec.c
@@ -623,37 +623,8 @@ frame_end:
 
     ff_MPV_frame_end(s);
 
-    /* divx 5.01+ bitstream reorder stuff */
-    /* Since this clobbers the input buffer and hwaccel codecs still need the
-     * data during hwaccel->end_frame we should not do this any earlier */
-    if (s->codec_id == AV_CODEC_ID_MPEG4 && s->divx_packed) {
-        int current_pos     = s->gb.buffer == s->bitstream_buffer ? 0 : (get_bits_count(&s->gb) >> 3);
-        int startcode_found = 0;
-
-        if (buf_size - current_pos > 7) {
-            int i;
-            for (i = current_pos; i < buf_size - 4; i++)
-                if (buf[i]     == 0 &&
-                    buf[i + 1] == 0 &&
-                    buf[i + 2] == 1 &&
-                    buf[i + 3] == 0xB6) {
-                    startcode_found = !(buf[i + 4] & 0x40);
-                    break;
-                }
-        }
-
-        if (startcode_found) {
-            av_fast_malloc(&s->bitstream_buffer,
-                           &s->allocated_bitstream_buffer_size,
-                           buf_size - current_pos +
-                           FF_INPUT_BUFFER_PADDING_SIZE);
-            if (!s->bitstream_buffer)
-                return AVERROR(ENOMEM);
-            memcpy(s->bitstream_buffer, buf + current_pos,
-                   buf_size - current_pos);
-            s->bitstream_buffer_size = buf_size - current_pos;
-        }
-    }
+    if (CONFIG_MPEG4_DECODER && avctx->codec_id == AV_CODEC_ID_MPEG4)
+        ff_mpeg4_frame_end(avctx, buf, buf_size);
 
     if (!s->divx_packed && avctx->hwaccel)
         ff_thread_finish_setup(avctx);
diff --git a/libavcodec/mpeg4video.h b/libavcodec/mpeg4video.h
index 93c101ecec..1230baa178 100644
--- a/libavcodec/mpeg4video.h
+++ b/libavcodec/mpeg4video.h
@@ -120,6 +120,7 @@ int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx);
 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
 void ff_mpeg4videodec_static_init(void);
 int ff_mpeg4_workaround_bugs(AVCodecContext *avctx);
+int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
 
 /**
  *
diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index 1155163c1e..def22f5a89 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -2624,6 +2624,48 @@ av_cold void ff_mpeg4videodec_static_init(void) {
     }
 }
 
+int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
+{
+    Mpeg4DecContext *ctx = avctx->priv_data;
+    MpegEncContext    *s = &ctx->m;
+
+    /* divx 5.01+ bitstream reorder stuff */
+    /* Since this clobbers the input buffer and hwaccel codecs still need the
+     * data during hwaccel->end_frame we should not do this any earlier */
+    if (s->divx_packed) {
+        int current_pos     = s->gb.buffer == s->bitstream_buffer ? 0 : (get_bits_count(&s->gb) >> 3);
+        int startcode_found = 0;
+
+        if (buf_size - current_pos > 7) {
+
+            int i;
+            for (i = current_pos; i < buf_size - 4; i++)
+
+                if (buf[i]     == 0 &&
+                    buf[i + 1] == 0 &&
+                    buf[i + 2] == 1 &&
+                    buf[i + 3] == 0xB6) {
+                    startcode_found = !(buf[i + 4] & 0x40);
+                    break;
+                }
+        }
+
+        if (startcode_found) {
+            av_fast_malloc(&s->bitstream_buffer,
+                           &s->allocated_bitstream_buffer_size,
+                           buf_size - current_pos +
+                           FF_INPUT_BUFFER_PADDING_SIZE);
+            if (!s->bitstream_buffer)
+                return AVERROR(ENOMEM);
+            memcpy(s->bitstream_buffer, buf + current_pos,
+                   buf_size - current_pos);
+            s->bitstream_buffer_size = buf_size - current_pos;
+        }
+    }
+
+    return 0;
+}
+
 static int mpeg4_update_thread_context(AVCodecContext *dst,
                                        const AVCodecContext *src)
 {