diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
index 66f72c3349..e6e593ba4b 100644
--- a/libavformat/asfdec.c
+++ b/libavformat/asfdec.c
@@ -428,9 +428,6 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
             avio_rl16(pb); //ds_data_size
             avio_r8(pb);   //ds_silence_data
         }
-        //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
-        //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
-        //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
         if (asf_st->ds_span > 1) {
             if (!asf_st->ds_chunk_size
                     || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
@@ -451,7 +448,6 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
         st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
         tag1 = avio_rl32(pb);
         avio_skip(pb, 20);
-        //                av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
         if (sizeX > 40) {
             st->codec->extradata_size = sizeX - 40;
             st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
@@ -697,9 +693,7 @@ static int asf_read_header(AVFormatContext *s)
         uint64_t gpos= avio_tell(pb);
         ff_get_guid(pb, &g);
         gsize = avio_rl64(pb);
-        av_dlog(s, "%08"PRIx64": ", gpos);
         print_guid(&g);
-        av_dlog(s, "  size=0x%"PRIx64"\n", gsize);
         if (!ff_guidcmp(&g, &ff_asf_data_header)) {
             asf->data_object_offset = avio_tell(pb);
             // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
@@ -931,9 +925,6 @@ static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
         }
         asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
         if(asf->packet_replic_size >= 8+38+4){
-//            for(i=0; i<asf->packet_replic_size-8; i++)
-//                av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
-//            av_log(s, AV_LOG_DEBUG, "\n");
             avio_skip(pb, 10);
             ts0= avio_rl64(pb);
             avio_skip(pb, 8);;
@@ -972,14 +963,12 @@ static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
                 asf->packet_padsize   -= diff;
             }
         }
-        //printf("Fragsize %d\n", asf->packet_frag_size);
     } else {
         if (rsize > asf->packet_size_left) {
             av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
             return -1;
         }
         asf->packet_frag_size = asf->packet_size_left - rsize;
-        //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
     }
     if (asf->packet_replic_size == 1) {
         asf->packet_multi_size = asf->packet_frag_size;
@@ -987,7 +976,6 @@ static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
             return -1;
     }
     asf->packet_size_left -= rsize;
-    //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
 
     return 0;
 }
@@ -1013,7 +1001,6 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
             || asf->packet_segments < 1) {
             //asf->packet_size_left <= asf->packet_padsize) {
             int ret = asf->packet_size_left + asf->packet_padsize;
-            //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
             assert(ret>=0);
             /* fail safe */
             avio_skip(pb, ret);
@@ -1060,7 +1047,6 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
                 continue;
             }
             asf->packet_multi_size -= asf->packet_obj_size;
-            //printf("COMPRESS size  %d  %d  %d   ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
         }
         if(   /*asf->packet_frag_size == asf->packet_obj_size*/
               asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
@@ -1170,8 +1156,6 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
                         int row = off / asf_st->ds_span;
                         int col = off % asf_st->ds_span;
                         int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
-                        //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
-
                         assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
                         assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
                         memcpy(newdata + offset,
@@ -1186,7 +1170,6 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
             }
             asf_st->frag_offset = 0;
             *pkt= asf_st->pkt;
-            //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
             asf_st->pkt.size = 0;
             asf_st->pkt.data = 0;
             asf_st->pkt.side_data_elems = 0;
@@ -1275,7 +1258,6 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
     *ppos= pos;
     avio_seek(s->pb, pos, SEEK_SET);
 
-//printf("asf_read_pts\n");
     asf_reset_header(s);
     for(;;){
         if (asf_read_packet(s, pkt) < 0){
@@ -1303,8 +1285,6 @@ static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos,
     }
 
     *ppos= pos;
-//printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
-
     return pts;
 }
 
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index b2a06edd8c..22ec5f8239 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -870,7 +870,6 @@ start_sync:
            ||(d[0] == 'J' && d[1] == 'U' && d[2] == 'N' && d[3] == 'K')
            ||(d[0] == 'i' && d[1] == 'd' && d[2] == 'x' && d[3] == '1')){
             avio_skip(pb, size);
-//av_log(s, AV_LOG_DEBUG, "SKIP\n");
             goto start_sync;
         }
 
@@ -944,7 +943,6 @@ start_sync:
 
                 if (exit_early)
                     return 0;
-//av_log(s, AV_LOG_DEBUG, "OK\n");
                 if(d[2]*256+d[3] == ast->prefix)
                     ast->prefix_count++;
                 else{
@@ -1025,12 +1023,10 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
                 best_ast->frame_offset= best_st->index_entries[i].timestamp;
         }
 
-//        av_log(s, AV_LOG_DEBUG, "%d\n", i);
         if(i>=0){
             int64_t pos= best_st->index_entries[i].pos;
             pos += best_ast->packet_size - best_ast->remaining;
             avio_seek(s->pb, pos + 8, SEEK_SET);
-//        av_log(s, AV_LOG_DEBUG, "pos=%"PRId64"\n", pos);
 
             assert(best_ast->remaining <= best_ast->packet_size);
 
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index 86698794df..fa6321200e 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -520,7 +520,6 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
     AVCodecContext *enc= s->streams[stream_index]->codec;
     int size= pkt->size;
 
-//    av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
     while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){
         AVPacket empty_packet;
 
@@ -529,7 +528,6 @@ static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
         empty_packet.data= NULL;
         empty_packet.stream_index= stream_index;
         avi_write_packet(s, &empty_packet);
-//        av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
     }
     avist->packet_count++;
 
diff --git a/libavformat/ffmdec.c b/libavformat/ffmdec.c
index c4ee22e73a..8929657784 100644
--- a/libavformat/ffmdec.c
+++ b/libavformat/ffmdec.c
@@ -240,9 +240,6 @@ static void adjust_write_index(AVFormatContext *s)
         ffm->write_index += pos_max;
     }
 
-    //printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
-    //printf("pts range %0.6f - %0.6f\n", get_dts(s, 0) / 1000000. , get_dts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
-
  end:
     avio_seek(pb, ptr, SEEK_SET);
 }
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 839b9b0df4..8aeea968b4 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -423,9 +423,6 @@ static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
     uint8_t *data = NULL;
     int flags = 0, flags_size;
 
-    // av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n",
-    //        enc->codec_type, timestamp, size);
-
     if (enc->codec_id == AV_CODEC_ID_VP6 || enc->codec_id == AV_CODEC_ID_VP6F ||
         enc->codec_id == AV_CODEC_ID_AAC)
         flags_size = 2;
diff --git a/libavformat/h263dec.c b/libavformat/h263dec.c
index 9f50faabc4..101ef51748 100644
--- a/libavformat/h263dec.c
+++ b/libavformat/h263dec.c
@@ -55,8 +55,6 @@ static int h263_probe(AVProbeData *p)
                 last_gn= gn;
         }
     }
-//av_log(NULL, AV_LOG_ERROR, "h263_probe: psc:%d invalid:%d res_change:%d\n", valid_psc, invalid_psc, res_change);
-//h263_probe: psc:3 invalid:0 res_change:0 (1588/recent_ffmpeg_parses_mpg_incorrectly.mpg)
     if(valid_psc > 2*invalid_psc + 2*res_change + 3){
         return 50;
     }else if(valid_psc > 2*invalid_psc)
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 90c5806f50..935b9a3ad7 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -2002,7 +2002,6 @@ static int mov_write_uuidusmt_tag(AVIOContext *pb, AVFormatContext *s)
 
         mov_write_psp_udta_tag(pb, LIBAVCODEC_IDENT,      "eng", 0x04);
         mov_write_psp_udta_tag(pb, title->value,          "eng", 0x01);
-//        snprintf(dt,32,"%04d/%02d/%02d %02d:%02d:%02d",t_st->tm_year+1900,t_st->tm_mon+1,t_st->tm_mday,t_st->tm_hour,t_st->tm_min,t_st->tm_sec);
         mov_write_psp_udta_tag(pb, "2006/04/01 11:11:11", "und", 0x03);
 
         update_size(pb, pos2);
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index a56f17abf3..2d08b17682 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -84,7 +84,6 @@ static int mpegps_probe(AVProbeData *p)
     if(vid+audio > invalid)     /* invalid VDR files nd short PES streams */
         score= AVPROBE_SCORE_MAX/4;
 
-//av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d %d len:%d\n", sys, priv1, pspack,vid, audio, invalid, p->buf_size);
     if(sys>invalid && sys*9 <= pspack*10)
         return pspack > 2 ? AVPROBE_SCORE_MAX/2+2 : AVPROBE_SCORE_MAX/4; // +1 for .mpg
     if(pspack > invalid && (priv1+vid+audio)*10 >= pspack*9)
@@ -218,7 +217,6 @@ static int mpegps_read_pes_header(AVFormatContext *s,
         size = MAX_SYNC_SIZE;
         startcode = find_next_start_code(s->pb, &size, &m->header_state);
         last_sync = avio_tell(s->pb);
-    //printf("startcode=%x pos=0x%"PRIx64"\n", startcode, avio_tell(s->pb));
     if (startcode < 0){
         if(s->pb->eof_reached)
             return AVERROR_EOF;
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index 29b6dcdaab..4b1e66379c 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -95,16 +95,12 @@ static int find_header_idx(AVFormatContext *s, AVCodecContext *c, int size, int
     int i;
     int len= find_expected_header(c, size, frame_type, out);
 
-//av_log(NULL, AV_LOG_ERROR, "expected_h len=%d size=%d codec_id=%d\n", len, size, c->codec_id);
-
     for(i=1; i<nut->header_count; i++){
         if(   len == nut->header_len[i]
            && !memcmp(out, nut->header[i], len)){
-//    av_log(NULL, AV_LOG_ERROR, "found %d\n", i);
             return i;
         }
     }
-//    av_log(NULL, AV_LOG_ERROR, "nothing found\n");
     return 0;
 }
 
diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
index 3ddf33ce64..df272188a8 100644
--- a/libavformat/rtsp.c
+++ b/libavformat/rtsp.c
@@ -154,8 +154,6 @@ static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
         get_word_sep(buf, sizeof(buf), "-", &p);
         av_parse_time(end, buf, 1);
     }
-//    av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
-//    av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
 }
 
 static int get_sockaddr(const char *buf, struct sockaddr_storage *sock)
diff --git a/libavformat/swfdec.c b/libavformat/swfdec.c
index 6a923f307d..ff44452f8f 100644
--- a/libavformat/swfdec.c
+++ b/libavformat/swfdec.c
@@ -45,7 +45,6 @@ static int get_swf_tag(AVIOContext *pb, int *len_ptr)
     if (len == 0x3f) {
         len = avio_rl32(pb);
     }
-//    av_log(NULL, AV_LOG_DEBUG, "Tag: %d - Len: %d\n", tag, len);
     *len_ptr = len;
     return tag;
 }
diff --git a/libavutil/lfg.c b/libavutil/lfg.c
index c1f2861785..4221e6228b 100644
--- a/libavutil/lfg.c
+++ b/libavutil/lfg.c
@@ -72,10 +72,8 @@ int main(void)
     av_lfg_init(&state, 0xdeadbeef);
     for (j = 0; j < 10000; j++) {
         START_TIMER
-        for (i = 0; i < 624; i++) {
-            //av_log(NULL, AV_LOG_ERROR, "%X\n", av_lfg_get(&state));
+        for (i = 0; i < 624; i++)
             x += av_lfg_get(&state);
-        }
         STOP_TIMER("624 calls of av_lfg_get");
     }
     av_log(NULL, AV_LOG_ERROR, "final value:%X\n", x);
diff --git a/tools/pktdumper.c b/tools/pktdumper.c
index 087ac5b2dc..98b9327ef4 100644
--- a/tools/pktdumper.c
+++ b/tools/pktdumper.c
@@ -113,7 +113,6 @@ int main(int argc, char **argv)
                  (pkt.flags & AV_PKT_FLAG_KEY) ? 'K' : '_');
         printf(PKTFILESUFF "\n", pktnum, pkt.stream_index, pkt.pts, pkt.size,
                (pkt.flags & AV_PKT_FLAG_KEY) ? 'K' : '_');
-        //printf("open(\"%s\")\n", pktfilename);
         if (!nowrite) {
             fd  = open(pktfilename, O_WRONLY | O_CREAT, 0644);
             err = write(fd, pkt.data, pkt.size);