diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 9a002142ccf4942cfd8c9f76761fda9a82749d27..9be317c55fda7bc50cccc8993c5d0862fec5d721 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -591,6 +591,9 @@ static int h264_init_context(AVCodecContext *avctx, H264Context *h)
     int i;
 
     h->avctx                 = avctx;
+    h->backup_width          = -1;
+    h->backup_height         = -1;
+    h->backup_pix_fmt        = AV_PIX_FMT_NONE;
     h->dequant_coeff_pps     = -1;
     h->current_sps_id        = -1;
     h->cur_chroma_format_idc = -1;
@@ -1675,6 +1678,14 @@ static int output_frame(H264Context *h, AVFrame *dst, H264Picture *srcp)
 
     av_dict_set(&dst->metadata, "stereo_mode", ff_h264_sei_stereo_mode(h), 0);
 
+    h->backup_width   = h->avctx->width;
+    h->backup_height  = h->avctx->height;
+    h->backup_pix_fmt = h->avctx->pix_fmt;
+
+    h->avctx->width   = dst->width;
+    h->avctx->height  = dst->height;
+    h->avctx->pix_fmt = dst->format;
+
     if (srcp->sei_recovery_frame_cnt == 0)
         dst->key_frame = 1;
     if (!srcp->crop)
@@ -1726,6 +1737,19 @@ static int h264_decode_frame(AVCodecContext *avctx, void *data,
 
     h->flags = avctx->flags;
 
+    if (h->backup_width != -1) {
+        avctx->width    = h->backup_width;
+        h->backup_width = -1;
+    }
+    if (h->backup_height != -1) {
+        avctx->height    = h->backup_height;
+        h->backup_height = -1;
+    }
+    if (h->backup_pix_fmt != AV_PIX_FMT_NONE) {
+        avctx->pix_fmt    = h->backup_pix_fmt;
+        h->backup_pix_fmt = AV_PIX_FMT_NONE;
+    }
+
     ff_h264_unref_picture(h, &h->last_pic_for_ec);
 
     /* end of stream, output what is still in the buffers */
diff --git a/libavcodec/h264.h b/libavcodec/h264.h
index 95db912465b893dfa2299f0861a357308147c56f..548510d793016ea8939cbd058a54345cc4877c60 100644
--- a/libavcodec/h264.h
+++ b/libavcodec/h264.h
@@ -519,6 +519,14 @@ typedef struct H264Context {
     int width, height;
     int chroma_x_shift, chroma_y_shift;
 
+    /**
+     * Backup frame properties: needed, because they can be different
+     * between returned frame and last decoded frame.
+     **/
+    int backup_width;
+    int backup_height;
+    enum AVPixelFormat backup_pix_fmt;
+
     int droppable;
     int coded_picture_number;
     int low_delay;
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 9c4d613195c4b4e6c259e5dd98281b01750e8c7f..0c0812f472ad69ee467e8d0d16c552ee19de49f2 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -497,6 +497,9 @@ int ff_h264_update_thread_context(AVCodecContext *dst,
     h->picture_structure    = h1->picture_structure;
     h->droppable            = h1->droppable;
     h->low_delay            = h1->low_delay;
+    h->backup_width         = h1->backup_width;
+    h->backup_height        = h1->backup_height;
+    h->backup_pix_fmt       = h1->backup_pix_fmt;
 
     for (i = 0; i < H264_MAX_PICTURE_COUNT; i++) {
         ff_h264_unref_picture(h, &h->DPB[i]);