diff --git a/libavcodec/dvdsubenc.c b/libavcodec/dvdsubenc.c
index 8130b74a7a..11858c7f97 100644
--- a/libavcodec/dvdsubenc.c
+++ b/libavcodec/dvdsubenc.c
@@ -383,7 +383,7 @@ static int encode_dvd_subtitles(AVCodecContext *avctx,
     qq = outbuf;
     bytestream_put_be16(&qq, q - outbuf);
 
-    av_log(NULL, AV_LOG_DEBUG, "subtitle_packet size=%td\n", q - outbuf);
+    av_log(NULL, AV_LOG_DEBUG, "subtitle_packet size=%"PTRDIFF_SPECIFIER"\n", q - outbuf);
     ret = q - outbuf;
 
 fail:
diff --git a/libavcodec/flac_parser.c b/libavcodec/flac_parser.c
index 6ff4d9c85f..37b5fa9dba 100644
--- a/libavcodec/flac_parser.c
+++ b/libavcodec/flac_parser.c
@@ -612,7 +612,7 @@ static int flac_parse(AVCodecParserContext *s, AVCodecContext *avctx,
         if (   av_fifo_space(fpc->fifo_buf) < read_end - read_start
             && av_fifo_realloc2(fpc->fifo_buf, (read_end - read_start) + 2*av_fifo_size(fpc->fifo_buf)) < 0) {
             av_log(avctx, AV_LOG_ERROR,
-                   "couldn't reallocate buffer of size %td\n",
+                   "couldn't reallocate buffer of size %"PTRDIFF_SPECIFIER"\n",
                    (read_end - read_start) + av_fifo_size(fpc->fifo_buf));
             goto handle_error;
         }
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 1234168a1f..da2d911ebc 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -2405,10 +2405,10 @@ static int decode_slice(struct AVCodecContext *avctx, void *arg)
                 return 0;
             }
             if (h->cabac.bytestream > h->cabac.bytestream_end + 2 )
-                av_log(h->avctx, AV_LOG_DEBUG, "bytestream overread %td\n", h->cabac.bytestream_end - h->cabac.bytestream);
+                av_log(h->avctx, AV_LOG_DEBUG, "bytestream overread %"PTRDIFF_SPECIFIER"\n", h->cabac.bytestream_end - h->cabac.bytestream);
             if (ret < 0 || h->cabac.bytestream > h->cabac.bytestream_end + 4) {
                 av_log(h->avctx, AV_LOG_ERROR,
-                       "error while decoding MB %d %d, bytestream %td\n",
+                       "error while decoding MB %d %d, bytestream %"PTRDIFF_SPECIFIER"\n",
                        h->mb_x, h->mb_y,
                        h->cabac.bytestream_end - h->cabac.bytestream);
                 er_add_slice(h, h->resync_mb_x, h->resync_mb_y, h->mb_x,
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 5ae540e857..fbfb7d1e5f 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -782,7 +782,7 @@ static int jpeg2000_decode_packet(Jpeg2000DecoderContext *s,
                 return ret;
             if (ret > sizeof(cblk->data)) {
                 avpriv_request_sample(s->avctx,
-                                      "Block with lengthinc greater than %zu",
+                                      "Block with lengthinc greater than %"SIZE_SPECIFIER"",
                                       sizeof(cblk->data));
                 return AVERROR_PATCHWELCOME;
             }
diff --git a/libavcodec/libvpxenc.c b/libavcodec/libvpxenc.c
index 869c8fe115..bc0cf96b06 100644
--- a/libavcodec/libvpxenc.c
+++ b/libavcodec/libvpxenc.c
@@ -158,7 +158,7 @@ static av_cold void dump_enc_cfg(AVCodecContext *avctx,
            width, "g_lag_in_frames:",   cfg->g_lag_in_frames);
     av_log(avctx, level, "rate control settings\n"
            "  %*s%u\n  %*s%u\n  %*s%u\n  %*s%u\n"
-           "  %*s%d\n  %*s%p(%zu)\n  %*s%u\n",
+           "  %*s%d\n  %*s%p(%"SIZE_SPECIFIER")\n  %*s%u\n",
            width, "rc_dropframe_thresh:",   cfg->rc_dropframe_thresh,
            width, "rc_resize_allowed:",     cfg->rc_resize_allowed,
            width, "rc_resize_up_thresh:",   cfg->rc_resize_up_thresh,
@@ -373,7 +373,7 @@ static av_cold int vpx_init(AVCodecContext *avctx,
         ctx->twopass_stats.buf = av_malloc(ctx->twopass_stats.sz);
         if (!ctx->twopass_stats.buf) {
             av_log(avctx, AV_LOG_ERROR,
-                   "Stat buffer alloc (%zu bytes) failed\n",
+                   "Stat buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",
                    ctx->twopass_stats.sz);
             return AVERROR(ENOMEM);
         }
@@ -616,7 +616,7 @@ static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out,
 
                 if (!cx_frame->buf) {
                     av_log(avctx, AV_LOG_ERROR,
-                           "Data buffer alloc (%zu bytes) failed\n",
+                           "Data buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",
                            cx_frame->sz);
                     av_free(cx_frame);
                     return AVERROR(ENOMEM);
@@ -626,7 +626,7 @@ static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out,
                     cx_frame->buf_alpha = av_malloc(cx_frame->sz_alpha);
                     if (!cx_frame->buf_alpha) {
                         av_log(avctx, AV_LOG_ERROR,
-                               "Data buffer alloc (%zu bytes) failed\n",
+                               "Data buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",
                                cx_frame->sz_alpha);
                         av_free(cx_frame);
                         return AVERROR(ENOMEM);
diff --git a/libavcodec/mjpegdec.c b/libavcodec/mjpegdec.c
index dfe75bf8ca..f2f5498f0b 100644
--- a/libavcodec/mjpegdec.c
+++ b/libavcodec/mjpegdec.c
@@ -1813,7 +1813,7 @@ int ff_mjpeg_find_marker(MJpegDecodeContext *s,
         memset(s->buffer + *unescaped_buf_size, 0,
                FF_INPUT_BUFFER_PADDING_SIZE);
 
-        av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %td bytes\n",
+        av_log(s->avctx, AV_LOG_DEBUG, "escaping removed %"PTRDIFF_SPECIFIER" bytes\n",
                (buf_end - *buf_ptr) - (dst - s->buffer));
     } else if (start_code == SOS && s->ls) {
         const uint8_t *src = *buf_ptr;
@@ -1896,7 +1896,7 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
                    start_code, unescaped_buf_size, buf_size);
             return AVERROR_INVALIDDATA;
         }
-        av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%td\n",
+        av_log(avctx, AV_LOG_DEBUG, "marker=%x avail_size_in_buf=%"PTRDIFF_SPECIFIER"\n",
                start_code, buf_end - buf_ptr);
 
         ret = init_get_bits8(&s->gb, unescaped_buf_ptr, unescaped_buf_size);
@@ -2181,7 +2181,7 @@ the_end:
     av_dict_copy(avpriv_frame_get_metadatap(data), s->exif_metadata, 0);
     av_dict_free(&s->exif_metadata);
 
-    av_log(avctx, AV_LOG_DEBUG, "decode frame unused %td bytes\n",
+    av_log(avctx, AV_LOG_DEBUG, "decode frame unused %"PTRDIFF_SPECIFIER" bytes\n",
            buf_end - buf_ptr);
 //  return buf_end - buf_ptr;
     return buf_ptr - buf;
diff --git a/libavcodec/mpeg12dec.c b/libavcodec/mpeg12dec.c
index 55448418e1..98a732f111 100644
--- a/libavcodec/mpeg12dec.c
+++ b/libavcodec/mpeg12dec.c
@@ -2391,7 +2391,7 @@ static int decode_chunks(AVCodecContext *avctx, AVFrame *picture,
         input_size = buf_end - buf_ptr;
 
         if (avctx->debug & FF_DEBUG_STARTCODE)
-            av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %td left %d\n",
+            av_log(avctx, AV_LOG_DEBUG, "%3"PRIX32" at %"PTRDIFF_SPECIFIER" left %d\n",
                    start_code, buf_ptr - buf, input_size);
 
         /* prepare data for next start code */
diff --git a/libavcodec/mpegvideo_enc.c b/libavcodec/mpegvideo_enc.c
index 09b48ab8a8..cd5c19e1e3 100644
--- a/libavcodec/mpegvideo_enc.c
+++ b/libavcodec/mpegvideo_enc.c
@@ -1045,7 +1045,7 @@ static int load_input_picture(MpegEncContext *s, const AVFrame *pic_arg)
         if (s->linesize & (STRIDE_ALIGN-1))
             direct = 0;
 
-        av_dlog(s->avctx, "%d %d %td %td\n", pic_arg->linesize[0],
+        av_dlog(s->avctx, "%d %d %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"\n", pic_arg->linesize[0],
                 pic_arg->linesize[1], s->linesize, s->uvlinesize);
 
         if (direct) {
diff --git a/libavcodec/wmadec.c b/libavcodec/wmadec.c
index b1816b4eea..466c1a9a10 100644
--- a/libavcodec/wmadec.c
+++ b/libavcodec/wmadec.c
@@ -927,7 +927,7 @@ static int wma_decode_superframe(AVCodecContext *avctx, void *data,
         samples_offset += s->frame_len;
     }
 
-    av_dlog(s->avctx, "%d %d %d %d outbytes:%td eaten:%d\n",
+    av_dlog(s->avctx, "%d %d %d %d outbytes:%"PTRDIFF_SPECIFIER" eaten:%d\n",
             s->frame_len_bits, s->block_len_bits, s->frame_len, s->block_len,
             (int8_t *)samples - (int8_t *)data, avctx->block_align);
 
diff --git a/libavcodec/zmbv.c b/libavcodec/zmbv.c
index 71e828771a..21a9e35c39 100644
--- a/libavcodec/zmbv.c
+++ b/libavcodec/zmbv.c
@@ -145,7 +145,7 @@ static int zmbv_decode_xor_8(ZmbvContext *c)
         prev += c->width * c->bh;
     }
     if (src - c->decomp_buf != c->decomp_len)
-        av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n",
+        av_log(c->avctx, AV_LOG_ERROR, "Used %"PTRDIFF_SPECIFIER" of %i bytes\n",
                src-c->decomp_buf, c->decomp_len);
     return 0;
 }
@@ -219,7 +219,7 @@ static int zmbv_decode_xor_16(ZmbvContext *c)
         prev += c->width * c->bh;
     }
     if (src - c->decomp_buf != c->decomp_len)
-        av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n",
+        av_log(c->avctx, AV_LOG_ERROR, "Used %"PTRDIFF_SPECIFIER" of %i bytes\n",
                src-c->decomp_buf, c->decomp_len);
     return 0;
 }
@@ -377,7 +377,7 @@ static int zmbv_decode_xor_32(ZmbvContext *c)
         prev   += c->width * c->bh;
     }
     if (src - c->decomp_buf != c->decomp_len)
-        av_log(c->avctx, AV_LOG_ERROR, "Used %ti of %i bytes\n",
+        av_log(c->avctx, AV_LOG_ERROR, "Used %"PTRDIFF_SPECIFIER" of %i bytes\n",
                src-c->decomp_buf, c->decomp_len);
     return 0;
 }
diff --git a/libavformat/ape.c b/libavformat/ape.c
index b677ba9593..d5a786a198 100644
--- a/libavformat/ape.c
+++ b/libavformat/ape.c
@@ -264,7 +264,7 @@ static int ape_read_header(AVFormatContext * s)
     }
     if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) {
         av_log(s, AV_LOG_ERROR,
-               "Number of seek entries is less than number of frames: %zu vs. %"PRIu32"\n",
+               "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
                ape->seektablelength / sizeof(*ape->seektable), ape->totalframes);
         return AVERROR_INVALIDDATA;
     }
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index 4cf8e9bcea..fb89e83944 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -327,14 +327,14 @@ static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
 
     geob_data = av_mallocz(sizeof(ID3v2ExtraMetaGEOB));
     if (!geob_data) {
-        av_log(s, AV_LOG_ERROR, "Failed to alloc %zu bytes\n",
+        av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
                sizeof(ID3v2ExtraMetaGEOB));
         return;
     }
 
     new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
     if (!new_extra) {
-        av_log(s, AV_LOG_ERROR, "Failed to alloc %zu bytes\n",
+        av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
                sizeof(ID3v2ExtraMeta));
         goto fail;
     }
diff --git a/libavformat/mmsh.c b/libavformat/mmsh.c
index 482ece4031..dac5d9f653 100644
--- a/libavformat/mmsh.c
+++ b/libavformat/mmsh.c
@@ -119,7 +119,7 @@ static int read_data_packet(MMSHContext *mmsh, const int len)
     int res;
     if (len > sizeof(mms->in_buffer)) {
         av_log(NULL, AV_LOG_ERROR,
-               "Data packet length %d exceeds the in_buffer size %zu\n",
+               "Data packet length %d exceeds the in_buffer size %"SIZE_SPECIFIER"\n",
                len, sizeof(mms->in_buffer));
         return AVERROR(EIO);
     }
@@ -194,7 +194,7 @@ static int get_http_header_data(MMSHContext *mmsh)
             if (len) {
                 if (len > sizeof(mms->in_buffer)) {
                     av_log(NULL, AV_LOG_ERROR,
-                           "Other packet len = %d exceed the in_buffer size %zu\n",
+                           "Other packet len = %d exceed the in_buffer size %"SIZE_SPECIFIER"\n",
                            len, sizeof(mms->in_buffer));
                     return AVERROR(EIO);
                 }
diff --git a/libavformat/mmst.c b/libavformat/mmst.c
index ebef3ef098..c851187daf 100644
--- a/libavformat/mmst.c
+++ b/libavformat/mmst.c
@@ -284,7 +284,7 @@ static MMSSCPacketType get_tcp_server_response(MMSTContext *mmst)
             if (length_remaining < 0
                 || length_remaining > sizeof(mms->in_buffer) - 12) {
                 av_log(NULL, AV_LOG_ERROR,
-                       "Incoming packet length %d exceeds bufsize %zu\n",
+                       "Incoming packet length %d exceeds bufsize %"SIZE_SPECIFIER"\n",
                        length_remaining, sizeof(mms->in_buffer) - 12);
                 return AVERROR_INVALIDDATA;
             }
@@ -320,7 +320,7 @@ static MMSSCPacketType get_tcp_server_response(MMSTContext *mmst)
             if (length_remaining < 0
                 || length_remaining > sizeof(mms->in_buffer) - 8) {
                 av_log(NULL, AV_LOG_ERROR,
-                       "Data length %d is invalid or too large (max=%zu)\n",
+                       "Data length %d is invalid or too large (max=%"SIZE_SPECIFIER")\n",
                        length_remaining, sizeof(mms->in_buffer));
                 return AVERROR_INVALIDDATA;
             }
diff --git a/libavformat/oggparsevorbis.c b/libavformat/oggparsevorbis.c
index c0898b0abf..75de0bdde5 100644
--- a/libavformat/oggparsevorbis.c
+++ b/libavformat/oggparsevorbis.c
@@ -170,7 +170,7 @@ int ff_vorbis_comment(AVFormatContext *as, AVDictionary **m,
 
     if (p != end)
         av_log(as, AV_LOG_INFO,
-               "%ti bytes of comment header remain\n", end - p);
+               "%"PTRDIFF_SPECIFIER" bytes of comment header remain\n", end - p);
     if (n > 0)
         av_log(as, AV_LOG_INFO,
                "truncated comment header, %i comments not found\n", n);
diff --git a/libavformat/rtpdec_xiph.c b/libavformat/rtpdec_xiph.c
index 887a65ed65..43f72a2305 100644
--- a/libavformat/rtpdec_xiph.c
+++ b/libavformat/rtpdec_xiph.c
@@ -256,7 +256,7 @@ parse_packed_headers(const uint8_t * packed_headers,
 
     if (packed_headers_end - packed_headers < 9) {
         av_log(codec, AV_LOG_ERROR,
-               "Invalid %td byte packed header.",
+               "Invalid %"PTRDIFF_SPECIFIER" byte packed header.",
                packed_headers_end - packed_headers);
         return AVERROR_INVALIDDATA;
     }
@@ -278,7 +278,7 @@ parse_packed_headers(const uint8_t * packed_headers,
     if (packed_headers_end - packed_headers != length ||
         length1 > length || length2 > length - length1) {
         av_log(codec, AV_LOG_ERROR,
-               "Bad packed header lengths (%d,%d,%td,%d)\n", length1,
+               "Bad packed header lengths (%d,%d,%"PTRDIFF_SPECIFIER",%d)\n", length1,
                length2, packed_headers_end - packed_headers, length);
         return AVERROR_INVALIDDATA;
     }
diff --git a/libavformat/sdp.c b/libavformat/sdp.c
index ae2948355d..c53de90517 100644
--- a/libavformat/sdp.c
+++ b/libavformat/sdp.c
@@ -217,7 +217,7 @@ static char *extradata2psets(AVCodecContext *c)
             sps_end = r1;
         }
         if (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) {
-            av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
+            av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
             av_free(psets);
 
             return NULL;
diff --git a/libavutil/internal.h b/libavutil/internal.h
index c6c0aa8d38..e5560ca7ab 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -231,6 +231,11 @@ void avpriv_request_sample(void *avc,
 
 #if HAVE_LIBC_MSVCRT
 #define avpriv_open ff_open
+#define PTRDIFF_SPECIFIER "Id"
+#define SIZE_SPECIFIER "Iu"
+#else
+#define PTRDIFF_SPECIFIER "td"
+#define SIZE_SPECIFIER "zu"
 #endif
 
 /**