diff --git a/libavcodec/interplayvideo.c b/libavcodec/interplayvideo.c
index 7a1d6e7472..ca8f041320 100644
--- a/libavcodec/interplayvideo.c
+++ b/libavcodec/interplayvideo.c
@@ -133,7 +133,7 @@ static int ipvideo_decode_block_opcode_0x2(IpvideoContext *s)
         y =   8 + ((B - 56) / 29);
     }
 
-    av_dlog(NULL, "    motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
+    av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
     return copy_from(s, &s->second_last_frame, x, y);
 }
 
@@ -161,7 +161,7 @@ static int ipvideo_decode_block_opcode_0x3(IpvideoContext *s)
         y = -(  8 + ((B - 56) / 29));
     }
 
-    av_dlog(NULL, "    motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
+    av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
     return copy_from(s, &s->current_frame, x, y);
 }
 
@@ -184,7 +184,7 @@ static int ipvideo_decode_block_opcode_0x4(IpvideoContext *s)
     x = -8 + BL;
     y = -8 + BH;
 
-    av_dlog(NULL, "    motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
+    av_dlog(s->avctx, "motion byte = %d, (x, y) = (%d, %d)\n", B, x, y);
     return copy_from(s, &s->last_frame, x, y);
 }
 
@@ -199,7 +199,7 @@ static int ipvideo_decode_block_opcode_0x5(IpvideoContext *s)
     x = *s->stream_ptr++;
     y = *s->stream_ptr++;
 
-    av_dlog(NULL, "    motion bytes = %d, %d\n", x, y);
+    av_dlog(s->avctx, "motion bytes = %d, %d\n", x, y);
     return copy_from(s, &s->last_frame, x, y);
 }
 
@@ -580,7 +580,7 @@ static int ipvideo_decode_block_opcode_0x6_16(IpvideoContext *s)
     x = *s->stream_ptr++;
     y = *s->stream_ptr++;
 
-    av_dlog(NULL, "    motion bytes = %d, %d\n", x, y);
+    av_dlog(s->avctx, "motion bytes = %d, %d\n", x, y);
     return copy_from(s, &s->second_last_frame, x, y);
 }
 
@@ -957,7 +957,7 @@ static void ipvideo_decode_opcodes(IpvideoContext *s)
     static int frame = 0;
     GetBitContext gb;
 
-    av_dlog(NULL, "------------------ frame %d\n", frame);
+    av_dlog(s->avctx, "frame %d\n", frame);
     frame++;
 
     if (!s->is_16bpp) {
@@ -983,7 +983,7 @@ static void ipvideo_decode_opcodes(IpvideoContext *s)
         for (x = 0; x < s->avctx->width; x += 8) {
             opcode = get_bits(&gb, 4);
 
-            av_dlog(NULL, "  block @ (%3d, %3d): encoding 0x%X, data ptr @ %p\n",
+            av_dlog(s->avctx, "block @ (%3d, %3d): encoding 0x%X, data ptr @ %p\n",
                     x, y, opcode, s->stream_ptr);
 
             if (!s->is_16bpp) {