diff --git a/libavcodec/bitstream.c b/libavcodec/bitstream.c
index 329ec9527e..97d5b49105 100644
--- a/libavcodec/bitstream.c
+++ b/libavcodec/bitstream.c
@@ -81,8 +81,6 @@ void ff_copy_bits(PutBitContext *pb, const uint8_t *src, int length)
 
 /* VLC decoding */
 
-//#define DEBUG_VLC
-
 #define GET_DATA(v, table, i, wrap, size) \
 {\
     const uint8_t *ptr = (const uint8_t *)table + i * wrap;\
@@ -162,10 +160,7 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
 
     table_size = 1 << table_nb_bits;
     table_index = alloc_table(vlc, table_size, flags & INIT_VLC_USE_NEW_STATIC);
-#ifdef DEBUG_VLC
-    av_log(NULL,AV_LOG_DEBUG,"new table index=%d size=%d\n",
-           table_index, table_size);
-#endif
+    av_dlog(NULL, "new table index=%d size=%d\n", table_index, table_size);
     if (table_index < 0)
         return -1;
     table = &vlc->table[table_index];
@@ -180,9 +175,7 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
         n = codes[i].bits;
         code = codes[i].code;
         symbol = codes[i].symbol;
-#if defined(DEBUG_VLC) && 0
-        av_log(NULL,AV_LOG_DEBUG,"i=%d n=%d code=0x%x\n", i, n, code);
-#endif
+        av_dlog(NULL, "i=%d n=%d code=0x%x\n", i, n, code);
         if (n <= table_nb_bits) {
             /* no need to add another table */
             j = code >> (32 - table_nb_bits);
@@ -193,10 +186,7 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
                 inc = 1 << n;
             }
             for (k = 0; k < nb; k++) {
-#ifdef DEBUG_VLC
-                av_log(NULL, AV_LOG_DEBUG, "%4x: code=%d n=%d\n",
-                       j, i, n);
-#endif
+                av_dlog(NULL, "%4x: code=%d n=%d\n", j, i, n);
                 if (table[j][1] /*bits*/ != 0) {
                     av_log(NULL, AV_LOG_ERROR, "incorrect codes\n");
                     return -1;
@@ -226,10 +216,8 @@ static int build_table(VLC *vlc, int table_nb_bits, int nb_codes,
             subtable_bits = FFMIN(subtable_bits, table_nb_bits);
             j = (flags & INIT_VLC_LE) ? bitswap_32(code_prefix) >> (32 - table_nb_bits) : code_prefix;
             table[j][1] = -subtable_bits;
-#ifdef DEBUG_VLC
-            av_log(NULL,AV_LOG_DEBUG,"%4x: n=%d (subtable)\n",
-                   j, codes[i].bits + table_nb_bits);
-#endif
+            av_dlog(NULL, "%4x: n=%d (subtable)\n",
+                    j, codes[i].bits + table_nb_bits);
             index = build_table(vlc, subtable_bits, k-i, codes+i, flags);
             if (index < 0)
                 return -1;
@@ -291,9 +279,7 @@ int init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes,
         vlc->table_size = 0;
     }
 
-#ifdef DEBUG_VLC
-    av_log(NULL,AV_LOG_DEBUG,"build table nb_codes=%d\n", nb_codes);
-#endif
+    av_dlog(NULL, "build table nb_codes=%d\n", nb_codes);
 
     buf = av_malloc((nb_codes+1)*sizeof(VLCcode));
 
diff --git a/libavcodec/dv.c b/libavcodec/dv.c
index cd682ecb2b..4fde2a7899 100644
--- a/libavcodec/dv.c
+++ b/libavcodec/dv.c
@@ -358,9 +358,6 @@ static av_cold int dvvideo_init_encoder(AVCodecContext *avctx)
     return dvvideo_init(avctx);
 }
 
-// #define VLC_DEBUG
-// #define printf(...) av_log(NULL, AV_LOG_ERROR, __VA_ARGS__)
-
 typedef struct BlockInfo {
     const uint32_t *factor_table;
     const uint8_t *scan_table;
@@ -404,9 +401,8 @@ static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
 
     /* get the AC coefficients until last_index is reached */
     for (;;) {
-#ifdef VLC_DEBUG
-        printf("%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16), re_index);
-#endif
+        av_dlog(NULL, "%2d: bits=%04x index=%d\n", pos, SHOW_UBITS(re, gb, 16),
+                re_index);
         /* our own optimized GET_RL_VLC */
         index   = NEG_USR32(re_cache, TEX_VLC_BITS);
         vlc_len = dv_rl_vlc[index].len;
@@ -427,9 +423,7 @@ static void dv_decode_ac(GetBitContext *gb, BlockInfo *mb, DCTELEM *block)
         }
         re_index += vlc_len;
 
-#ifdef VLC_DEBUG
-        printf("run=%d level=%d\n", run, level);
-#endif
+        av_dlog(NULL, "run=%d level=%d\n", run, level);
         pos += run;
         if (pos >= 64)
             break;
@@ -533,9 +527,7 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
             mb->pos               = 0;
             mb->partial_bit_count = 0;
 
-#ifdef VLC_DEBUG
-            printf("MB block: %d, %d ", mb_index, j);
-#endif
+            av_dlog(avctx, "MB block: %d, %d ", mb_index, j);
             dv_decode_ac(&gb, mb, block);
 
             /* write the remaining bits  in a new buffer only if the
@@ -548,9 +540,7 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
         }
 
         /* pass 2 : we can do it just after */
-#ifdef VLC_DEBUG
-        printf("***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
-#endif
+        av_dlog(avctx, "***pass 2 size=%d MB#=%d\n", put_bits_count(&pb), mb_index);
         block = block1;
         mb    = mb1;
         init_get_bits(&gb, mb_bit_buffer, put_bits_count(&pb));
@@ -570,9 +560,7 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
     }
 
     /* we need a pass other the whole video segment */
-#ifdef VLC_DEBUG
-    printf("***pass 3 size=%d\n", put_bits_count(&vs_pb));
-#endif
+    av_dlog(avctx, "***pass 3 size=%d\n", put_bits_count(&vs_pb));
     block = &sblock[0][0];
     mb    = mb_data;
     init_get_bits(&gb, vs_bit_buffer, put_bits_count(&vs_pb));
@@ -580,9 +568,7 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
     for (mb_index = 0; mb_index < 5; mb_index++) {
         for (j = 0; j < s->sys->bpm; j++) {
             if (mb->pos < 64) {
-#ifdef VLC_DEBUG
-                printf("start %d:%d\n", mb_index, j);
-#endif
+                av_dlog(avctx, "start %d:%d\n", mb_index, j);
                 dv_decode_ac(&gb, mb, block);
             }
             if (mb->pos >= 64 && mb->pos < 127)
diff --git a/libavcodec/dvbsub_parser.c b/libavcodec/dvbsub_parser.c
index b54aac6b99..8f3b0653d4 100644
--- a/libavcodec/dvbsub_parser.c
+++ b/libavcodec/dvbsub_parser.c
@@ -22,9 +22,6 @@
 #include "dsputil.h"
 #include "get_bits.h"
 
-//#define DEBUG
-//#define DEBUG_PACKET_CONTENTS
-
 /* Parser (mostly) copied from dvdsub.c */
 
 #define PARSE_BUF_SIZE  (65536)
@@ -53,25 +50,20 @@ static int dvbsub_parse(AVCodecParserContext *s,
 {
     DVBSubParseContext *pc = s->priv_data;
     uint8_t *p, *p_end;
-    int len, buf_pos = 0;
+    int i, len, buf_pos = 0;
 
     av_dlog(avctx, "DVB parse packet pts=%"PRIx64", lpts=%"PRIx64", cpts=%"PRIx64":\n",
             s->pts, s->last_pts, s->cur_frame_pts[s->cur_frame_start_index]);
 
-#ifdef DEBUG_PACKET_CONTENTS
-    int i;
-
     for (i=0; i < buf_size; i++)
     {
-        av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
+        av_dlog(avctx, "%02x ", buf[i]);
         if (i % 16 == 15)
-            av_log(avctx, AV_LOG_INFO, "\n");
+            av_dlog(avctx, "\n");
     }
 
     if (i % 16 != 0)
-        av_log(avctx, AV_LOG_INFO, "\n");
-
-#endif
+        av_dlog(avctx, "\n");
 
     *poutbuf = NULL;
     *poutbuf_size = 0;
diff --git a/libavcodec/dvbsubdec.c b/libavcodec/dvbsubdec.c
index b6b57b8915..66659ae637 100644
--- a/libavcodec/dvbsubdec.c
+++ b/libavcodec/dvbsubdec.c
@@ -24,9 +24,6 @@
 #include "bytestream.h"
 #include "libavutil/colorspace.h"
 
-//#define DEBUG
-//#define DEBUG_PACKET_CONTENTS
-
 #define DVBSUB_PAGE_SEGMENT     0x10
 #define DVBSUB_REGION_SEGMENT   0x11
 #define DVBSUB_CLUT_SEGMENT     0x12
@@ -749,20 +746,17 @@ static void dvbsub_parse_pixel_data_block(AVCodecContext *avctx, DVBSubObjectDis
     av_dlog(avctx, "DVB pixel block size %d, %s field:\n", buf_size,
             top_bottom ? "bottom" : "top");
 
-#ifdef DEBUG_PACKET_CONTENTS
     for (i = 0; i < buf_size; i++) {
         if (i % 16 == 0)
-            av_log(avctx, AV_LOG_INFO, "0x%08p: ", buf+i);
+            av_dlog(avctx, "0x%8p: ", buf+i);
 
-        av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
+        av_dlog(avctx, "%02x ", buf[i]);
         if (i % 16 == 15)
-            av_log(avctx, AV_LOG_INFO, "\n");
+            av_dlog(avctx, "\n");
     }
 
     if (i % 16)
-        av_log(avctx, AV_LOG_INFO, "\n");
-
-#endif
+        av_dlog(avctx, "\n");
 
     if (region == 0)
         return;
@@ -911,27 +905,22 @@ static void dvbsub_parse_clut_segment(AVCodecContext *avctx,
     DVBSubContext *ctx = avctx->priv_data;
 
     const uint8_t *buf_end = buf + buf_size;
-    int clut_id;
+    int i, clut_id;
     DVBSubCLUT *clut;
     int entry_id, depth , full_range;
     int y, cr, cb, alpha;
     int r, g, b, r_add, g_add, b_add;
 
-#ifdef DEBUG_PACKET_CONTENTS
-    int i;
-
-    av_log(avctx, AV_LOG_INFO, "DVB clut packet:\n");
+    av_dlog(avctx, "DVB clut packet:\n");
 
     for (i=0; i < buf_size; i++) {
-        av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
+        av_dlog(avctx, "%02x ", buf[i]);
         if (i % 16 == 15)
-            av_log(avctx, AV_LOG_INFO, "\n");
+            av_dlog(avctx, "\n");
     }
 
     if (i % 16)
-        av_log(avctx, AV_LOG_INFO, "\n");
-
-#endif
+        av_dlog(avctx, "\n");
 
     clut_id = *buf++;
     buf += 1;
@@ -1405,22 +1394,18 @@ static int dvbsub_decode(AVCodecContext *avctx,
     int segment_type;
     int page_id;
     int segment_length;
-
-#ifdef DEBUG_PACKET_CONTENTS
     int i;
 
-    av_log(avctx, AV_LOG_INFO, "DVB sub packet:\n");
+    av_dlog(avctx, "DVB sub packet:\n");
 
     for (i=0; i < buf_size; i++) {
-        av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
+        av_dlog(avctx, "%02x ", buf[i]);
         if (i % 16 == 15)
-            av_log(avctx, AV_LOG_INFO, "\n");
+            av_dlog(avctx, "\n");
     }
 
     if (i % 16)
-        av_log(avctx, AV_LOG_INFO, "\n");
-
-#endif
+        av_dlog(avctx, "\n");
 
     if (buf_size <= 6 || *buf != 0x0f) {
         av_dlog(avctx, "incomplete or broken packet");
diff --git a/libavcodec/pgssubdec.c b/libavcodec/pgssubdec.c
index a480da1168..9546c38882 100644
--- a/libavcodec/pgssubdec.c
+++ b/libavcodec/pgssubdec.c
@@ -30,8 +30,6 @@
 #include "libavutil/colorspace.h"
 #include "libavutil/imgutils.h"
 
-//#define DEBUG_PACKET_CONTENTS
-
 #define RGBA(r,g,b,a) (((a) << 24) | ((r) << 16) | ((g) << 8) | (b))
 
 enum SegmentType {
@@ -404,21 +402,18 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size,
     const uint8_t *buf_end;
     uint8_t       segment_type;
     int           segment_length;
-
-#ifdef DEBUG_PACKET_CONTENTS
     int i;
 
-    av_log(avctx, AV_LOG_INFO, "PGS sub packet:\n");
+    av_dlog(avctx, "PGS sub packet:\n");
 
     for (i = 0; i < buf_size; i++) {
-        av_log(avctx, AV_LOG_INFO, "%02x ", buf[i]);
+        av_dlog(avctx, "%02x ", buf[i]);
         if (i % 16 == 15)
-            av_log(avctx, AV_LOG_INFO, "\n");
+            av_dlog(avctx, "\n");
     }
 
     if (i & 15)
-        av_log(avctx, AV_LOG_INFO, "\n");
-#endif
+        av_dlog(avctx, "\n");
 
     *data_size = 0;
 
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 6c3c95caa2..3aec86ceb1 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -23,7 +23,6 @@
 #include <limits.h>
 
 //#define DEBUG
-//#define DEBUG_METADATA
 //#define MOV_EXPORT_ALL_METADATA
 
 #include "libavutil/intreadwrite.h"
@@ -210,11 +209,9 @@ static int mov_read_udta_string(MOVContext *c, AVIOContext *pb, MOVAtom atom)
             av_metadata_set2(&c->fc->metadata, key2, str, 0);
         }
     }
-#ifdef DEBUG_METADATA
-    av_log(c->fc, AV_LOG_DEBUG, "lang \"%3s\" ", language);
-    av_log(c->fc, AV_LOG_DEBUG, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %lld\n",
-           key, str, (char*)&atom.type, str_size, atom.size);
-#endif
+    av_dlog(c->fc, "lang \"%3s\" ", language);
+    av_dlog(c->fc, "tag \"%s\" value \"%s\" atom \"%.4s\" %d %"PRId64"\n",
+            key, str, (char*)&atom.type, str_size, atom.size);
 
     return 0;
 }