diff --git a/fftools/ffprobe.c b/fftools/ffprobe.c
index 38462e1ff3..c136562afe 100644
--- a/fftools/ffprobe.c
+++ b/fftools/ffprobe.c
@@ -2165,7 +2165,7 @@ static void show_packet(WriterContext *w, InputFile *ifile, AVPacket *pkt, int p
               pkt->flags & AV_PKT_FLAG_DISCARD ? 'D' : '_');
 
     if (pkt->side_data_elems) {
-        int size;
+        size_t size;
         const uint8_t *side_metadata;
 
         side_metadata = av_packet_get_side_data(pkt, AV_PKT_DATA_STRINGS_METADATA, &size);
diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 0956a6ac6f..49b21ff43b 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -2101,7 +2101,7 @@ int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
         memcpy(dst, pal, AVPALETTE_SIZE);
         return 1;
     } else if (pal) {
-        av_log(logctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
+        av_log(logctx, AV_LOG_ERROR, "Palette size %zu is wrong\n", size);
     }
     return 0;
 }
diff --git a/libavcodec/mpeg12enc.c b/libavcodec/mpeg12enc.c
index 5676caef87..7d51278749 100644
--- a/libavcodec/mpeg12enc.c
+++ b/libavcodec/mpeg12enc.c
@@ -574,7 +574,7 @@ void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
                 put_bits(&s->pb, 8, 0xff);                  // marker_bits
             } else {
                 av_log(s->avctx, AV_LOG_WARNING,
-                    "Warning Closed Caption size (%d) can not exceed 93 bytes "
+                    "Warning Closed Caption size (%zu) can not exceed 93 bytes "
                     "and must be a multiple of 3\n", side_data->size);
             }
         }
diff --git a/libavcodec/mscc.c b/libavcodec/mscc.c
index fe02649623..d392363fa9 100644
--- a/libavcodec/mscc.c
+++ b/libavcodec/mscc.c
@@ -160,7 +160,7 @@ static int decode_frame(AVCodecContext *avctx,
             for (j = 0; j < 256; j++)
                 s->pal[j] = 0xFF000000 | AV_RL32(pal + j * 4);
         } else if (pal) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
+            av_log(avctx, AV_LOG_ERROR, "Palette size %zu is wrong\n", size);
         }
         memcpy(frame->data[1], s->pal, AVPALETTE_SIZE);
     }
diff --git a/libavfilter/af_ashowinfo.c b/libavfilter/af_ashowinfo.c
index 9046e8d84a..1ac4c432ed 100644
--- a/libavfilter/af_ashowinfo.c
+++ b/libavfilter/af_ashowinfo.c
@@ -170,7 +170,7 @@ static void dump_audio_service_type(AVFilterContext *ctx, AVFrameSideData *sd)
 
 static void dump_unknown(AVFilterContext *ctx, AVFrameSideData *sd)
 {
-    av_log(ctx, AV_LOG_INFO, "unknown side data type: %d, size %d bytes", sd->type, sd->size);
+    av_log(ctx, AV_LOG_INFO, "unknown side data type: %d, size %zu bytes", sd->type, sd->size);
 }
 
 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c
index 6208892005..69d1076079 100644
--- a/libavfilter/vf_showinfo.c
+++ b/libavfilter/vf_showinfo.c
@@ -314,7 +314,7 @@ static void dump_sei_unregistered_metadata(AVFilterContext *ctx, const AVFrameSi
     int i;
 
     if (sd->size < uuid_size) {
-        av_log(ctx, AV_LOG_ERROR, "invalid data(%d < UUID(%d-bytes))\n", sd->size, uuid_size);
+        av_log(ctx, AV_LOG_ERROR, "invalid data(%zu < UUID(%d-bytes))\n", sd->size, uuid_size);
         return;
     }
 
@@ -472,7 +472,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
             av_log(ctx, AV_LOG_INFO, "pan/scan");
             break;
         case AV_FRAME_DATA_A53_CC:
-            av_log(ctx, AV_LOG_INFO, "A/53 closed captions (%d bytes)", sd->size);
+            av_log(ctx, AV_LOG_INFO, "A/53 closed captions (%zu bytes)", sd->size);
             break;
         case AV_FRAME_DATA_SPHERICAL:
             dump_spherical(ctx, frame, sd);
@@ -516,7 +516,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
             dump_sei_unregistered_metadata(ctx, sd);
             break;
         default:
-            av_log(ctx, AV_LOG_WARNING, "unknown side data type %d (%d bytes)\n",
+            av_log(ctx, AV_LOG_WARNING, "unknown side data type %d (%zu bytes)\n",
                    sd->type, sd->size);
             break;
         }
diff --git a/libavformat/dump.c b/libavformat/dump.c
index 62ef5e9852..b89b3c63f3 100644
--- a/libavformat/dump.c
+++ b/libavformat/dump.c
@@ -496,7 +496,7 @@ static void dump_sidedata(void *ctx, const AVStream *st, const char *indent)
             break;
         default:
             av_log(ctx, AV_LOG_INFO,
-                   "unknown side data type %d (%d bytes)", sd->type, sd->size);
+                   "unknown side data type %d (%zu bytes)", sd->type, sd->size);
             break;
         }
 
diff --git a/libavformat/framecrcenc.c b/libavformat/framecrcenc.c
index 1fbe4aa4ee..0339056603 100644
--- a/libavformat/framecrcenc.c
+++ b/libavformat/framecrcenc.c
@@ -119,7 +119,7 @@ static int framecrc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
             default:
                 side_data_crc = av_adler32_update(0, data, sd->size);
             }
-            av_strlcatf(buf, sizeof(buf), ", %8d, 0x%08"PRIx32, pkt->side_data[i].size, side_data_crc);
+            av_strlcatf(buf, sizeof(buf), ", %8zu, 0x%08"PRIx32, pkt->side_data[i].size, side_data_crc);
         }
     }
     av_strlcatf(buf, sizeof(buf), "\n");
diff --git a/libavformat/hashenc.c b/libavformat/hashenc.c
index 1e9faf372a..4553ede011 100644
--- a/libavformat/hashenc.c
+++ b/libavformat/hashenc.c
@@ -309,7 +309,7 @@ static int framehash_write_packet(struct AVFormatContext *s, AVPacket *pkt)
                 }
             } else
                 av_hash_update(c->hashes[0], pkt->side_data[i].data, pkt->side_data[i].size);
-            snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), ", %8d, ", pkt->side_data[i].size);
+            snprintf(buf, sizeof(buf) - (AV_HASH_MAX_SIZE * 2 + 1), ", %8zu, ", pkt->side_data[i].size);
             len = strlen(buf);
             av_hash_final_hex(c->hashes[0], buf + len, sizeof(buf) - len);
             avio_write(s->pb, buf, strlen(buf));
