diff --git a/libavcodec/libx264.c b/libavcodec/libx264.c
index 2e0404d490f2bf5cc5e3457591b31c213b36f4b8..a394213680d1b6d34df68ee5d2896b410dc70d0a 100644
--- a/libavcodec/libx264.c
+++ b/libavcodec/libx264.c
@@ -286,7 +286,6 @@ static av_cold int X264_init(AVCodecContext *avctx)
 
     x4->params.b_deblocking_filter         = avctx->flags & CODEC_FLAG_LOOP_FILTER;
 
-    x4->params.rc.f_ip_factor             = 1 / fabs(avctx->i_quant_factor);
     x4->params.rc.f_pb_factor             = avctx->b_quant_factor;
     x4->params.analyse.i_chroma_qp_offset = avctx->chromaoffset;
     if (x4->preset || x4->tune)
@@ -357,6 +356,9 @@ static av_cold int X264_init(AVCodecContext *avctx)
         }
     }
 
+    if (avctx->i_quant_factor > 0)
+        x4->params.rc.f_ip_factor         = 1 / fabs(avctx->i_quant_factor);
+
     if (avctx->me_method == ME_EPZS)
         x4->params.analyse.i_me_method = X264_ME_DIA;
     else if (avctx->me_method == ME_HEX)
@@ -693,6 +695,7 @@ static const AVCodecDefault x264_defaults[] = {
     { "bf",               "-1" },
     { "flags2",           "0" },
     { "g",                "-1" },
+    { "i_qfactor",        "-1" },
     { "qmin",             "-1" },
     { "qmax",             "-1" },
     { "qdiff",            "-1" },
diff --git a/libavcodec/qtrle.c b/libavcodec/qtrle.c
index 3bc87e8abac641e14757ade94c5982e65419ad15..1b92885b321db7b5edfdfd48911acaf28963ac38 100644
--- a/libavcodec/qtrle.c
+++ b/libavcodec/qtrle.c
@@ -48,7 +48,7 @@ typedef struct QtrleContext {
 
 #define CHECK_PIXEL_PTR(n)                                                            \
     if ((pixel_ptr + n > pixel_limit) || (pixel_ptr + n < 0)) {                       \
-        av_log (s->avctx, AV_LOG_INFO, "Problem: pixel_ptr = %d, pixel_limit = %d\n", \
+        av_log (s->avctx, AV_LOG_ERROR, "Problem: pixel_ptr = %d, pixel_limit = %d\n",\
                 pixel_ptr + n, pixel_limit);                                          \
         return;                                                                       \
     }                                                                                 \