@@ -1609,6 +1609,25 @@ static void input_release_buffer(AVCodecContext *codec, AVFrame *pic)

     avfilter_unref_pic(pic->opaque);

 }

+static int input_reget_buffer(AVCodecContext *codec, AVFrame *pic)

+{

+    AVFilterPicRef *ref = pic->opaque;

+

+    if (pic->data[0] == NULL) {

+        pic->buffer_hints |= FF_BUFFER_HINTS_READABLE;

+        return codec->get_buffer(codec, pic);

+    }

+

+    if ((codec->width != ref->w) || (codec->height != ref->h) ||

+        (codec->pix_fmt != ref->pic->format)) {

+        av_log(codec, AV_LOG_ERROR, "Picture properties changed.\n");

+        return -1;

+    }

+

+    pic->reordered_opaque = codec->reordered_opaque;

+    return 0;

+}

+

 static int input_init(AVFilterContext *ctx, const char *args, void *opaque)

 {

     FilterPriv *priv = ctx->priv;

@@ -1622,6 +1641,7 @@ static int input_init(AVFilterContext *ctx, const char *args, void *opaque)

         priv->use_dr1 = 1;

         codec->get_buffer     = input_get_buffer;

         codec->release_buffer = input_release_buffer;

+        codec->reget_buffer   = input_reget_buffer;

     }

     priv->frame = avcodec_alloc_frame();