diff --git a/libavformat/asf.c b/libavformat/asf.c
index 0a22fad341..c267df225f 100644
--- a/libavformat/asf.c
+++ b/libavformat/asf.c
@@ -584,7 +584,7 @@ static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestam
    crap. They have misread the MPEG Systems spec !
  */
 static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
-                      uint8_t *buf, int payload_size)
+                      const uint8_t *buf, int payload_size)
 {
     ASFContext *asf = s->priv_data;
     int frag_pos, frag_len, frag_len1;
@@ -617,7 +617,7 @@ static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
 
 
 static int asf_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int timestamp)
+                            const uint8_t *buf, int size, int64_t timestamp)
 {
     ASFContext *asf = s->priv_data;
     ASFStream *stream;
diff --git a/libavformat/au.c b/libavformat/au.c
index b560437d51..f0aef8abfb 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -72,7 +72,7 @@ static int au_write_header(AVFormatContext *s)
 }
 
 static int au_write_packet(AVFormatContext *s, int stream_index_ptr,
-                           uint8_t *buf, int size, int force_pts)
+                           const uint8_t *buf, int size, int64_t pts)
 {
     ByteIOContext *pb = &s->pb;
     put_buffer(pb, buf, size);
diff --git a/libavformat/audio.c b/libavformat/audio.c
index aea0942661..3662e458ff 100644
--- a/libavformat/audio.c
+++ b/libavformat/audio.c
@@ -165,7 +165,7 @@ static int audio_write_header(AVFormatContext *s1)
 }
 
 static int audio_write_packet(AVFormatContext *s1, int stream_index,
-                              uint8_t *buf, int size, int force_pts)
+                              const uint8_t *buf, int size, int64_t pts)
 {
     AudioData *s = s1->priv_data;
     int len, ret;
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index b36a0b6f4b..d1d0ba365f 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -7,8 +7,8 @@ extern "C" {
 
 #define LIBAVFORMAT_VERSION_INT 0x000408
 #define LIBAVFORMAT_VERSION     "0.4.8"
-#define LIBAVFORMAT_BUILD       4607
-#define LIBAVFORMAT_BUILD_STR   "4607"
+#define LIBAVFORMAT_BUILD       4608
+#define LIBAVFORMAT_BUILD_STR   "4608"
 
 #define LIBAVFORMAT_IDENT	"FFmpeg" LIBAVFORMAT_VERSION "b" LIBAVFORMAT_BUILD_STR
 
@@ -124,10 +124,9 @@ typedef struct AVOutputFormat {
     enum CodecID audio_codec; /* default audio codec */
     enum CodecID video_codec; /* default video codec */
     int (*write_header)(struct AVFormatContext *);
-    /* XXX: change prototype for 64 bit pts */
     int (*write_packet)(struct AVFormatContext *, 
                         int stream_index,
-                        unsigned char *buf, int size, int force_pts);
+                        const uint8_t *buf, int size, int64_t pts);
     int (*write_trailer)(struct AVFormatContext *);
     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
     int flags;
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index f5ecfa8ff6..ce31b21e52 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -590,7 +590,7 @@ static int avi_write_idx1(AVFormatContext *s)
 }
 
 static int avi_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t pts)
 {
     AVIContext *avi = s->priv_data;
     ByteIOContext *pb = &s->pb;
diff --git a/libavformat/crc.c b/libavformat/crc.c
index d130917d70..c9f8360a51 100644
--- a/libavformat/crc.c
+++ b/libavformat/crc.c
@@ -33,7 +33,7 @@
 #define DO8(buf)  DO4(buf); DO4(buf);
 #define DO16(buf) DO8(buf); DO8(buf);
 
-static uint32_t adler32(uint32_t adler, uint8_t *buf, unsigned int len)
+static uint32_t adler32(uint32_t adler, const uint8_t *buf, unsigned int len)
 {
     unsigned long s1 = adler & 0xffff;
     unsigned long s2 = (adler >> 16) & 0xffff;
@@ -73,7 +73,7 @@ static int crc_write_header(struct AVFormatContext *s)
 
 static int crc_write_packet(struct AVFormatContext *s, 
                             int stream_index,
-                            unsigned char *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t pts)
 {
     CRCState *crc = s->priv_data;
     crc->crcval = adler32(crc->crcval, buf, size);
diff --git a/libavformat/dv.c b/libavformat/dv.c
index d713acb580..e5f2d4703d 100644
--- a/libavformat/dv.c
+++ b/libavformat/dv.c
@@ -102,8 +102,8 @@ int dv_write_header(struct AVFormatContext *s)
 }
 
 int dv_write_packet(struct AVFormatContext *s, 
-                     int stream_index,
-                     unsigned char *buf, int size, int force_pts)
+                    int stream_index,
+                    const uint8_t *buf, int size, int64_t pts)
 {
     DVMuxContext *c = s->priv_data;
    
diff --git a/libavformat/dvcore.c b/libavformat/dvcore.c
index c6d5ed6a95..9fc2b9abc7 100644
--- a/libavformat/dvcore.c
+++ b/libavformat/dvcore.c
@@ -418,7 +418,7 @@ void dv_format_frame(DVMuxContext *c, uint8_t* buf)
     }
 }
 
-void dv_inject_audio(DVMuxContext *c, uint8_t* pcm, uint8_t* frame_ptr)
+void dv_inject_audio(DVMuxContext *c, const uint8_t* pcm, uint8_t* frame_ptr)
 {
     int i, j, d, of;
     for (i = 0; i < c->sys->difseg_size; i++) {
@@ -434,7 +434,7 @@ void dv_inject_audio(DVMuxContext *c, uint8_t* pcm, uint8_t* frame_ptr)
     }
 }
 
-void dv_inject_video(DVMuxContext *c, uint8_t* video_data, uint8_t* frame_ptr)
+void dv_inject_video(DVMuxContext *c, const uint8_t* video_data, uint8_t* frame_ptr)
 {
     int i, j;
     int ptr = 0;
@@ -565,7 +565,7 @@ out:
 }
 
 /* FIXME: The following three functions could be underengineered ;-) */
-void dv_assemble_frame(DVMuxContext *c, uint8_t* video, uint8_t* audio, int asize)
+void dv_assemble_frame(DVMuxContext *c, const uint8_t* video, const uint8_t* audio, int asize)
 {
     uint8_t pcm[8192];
     uint8_t* frame = &c->frame_buf[0];
@@ -604,7 +604,7 @@ void dv_assemble_frame(DVMuxContext *c, uint8_t* video, uint8_t* audio, int asiz
         /* FIXME: we have to have more sensible approach than this one */
         if (fifo_size(&c->audio_data, c->audio_data.rptr) + asize >= AVCODEC_MAX_AUDIO_FRAME_SIZE)
 	    fprintf(stderr, "Can't process DV frame #%d. Insufficient video data or severe sync problem.\n", c->frames);
-	fifo_write(&c->audio_data, audio, asize, &c->audio_data.wptr);
+	fifo_write(&c->audio_data, (uint8_t *)audio, asize, &c->audio_data.wptr);
     }
 }
 
diff --git a/libavformat/dvcore.h b/libavformat/dvcore.h
index 0b8df69a91..e47adbbe17 100644
--- a/libavformat/dvcore.h
+++ b/libavformat/dvcore.h
@@ -59,14 +59,14 @@ typedef struct DVMuxContext {
 } DVMuxContext;
 
 void dv_format_frame(DVMuxContext *, uint8_t*);
-void dv_inject_audio(DVMuxContext *, uint8_t*, uint8_t*);
-void dv_inject_video(DVMuxContext *, uint8_t*, uint8_t*);
+void dv_inject_audio(DVMuxContext *, const uint8_t*, uint8_t*);
+void dv_inject_video(DVMuxContext *, const uint8_t*, uint8_t*);
 
 int  dv_extract_audio(uint8_t*, uint8_t*, AVCodecContext*);
 
 int  dv_audio_frame_size(const DVprofile*, int);
 
-void dv_assemble_frame(DVMuxContext *, uint8_t*, uint8_t*, int);
+void dv_assemble_frame(DVMuxContext *c, const uint8_t*, const uint8_t*, int);
 int  dv_core_init(DVMuxContext *, AVStream*[]);
 void dv_core_delete(DVMuxContext *);
 
diff --git a/libavformat/ffm.c b/libavformat/ffm.c
index 7eb3ca4e88..350da589b6 100644
--- a/libavformat/ffm.c
+++ b/libavformat/ffm.c
@@ -82,7 +82,7 @@ static void flush_packet(AVFormatContext *s)
 
 /* 'first' is true if first data of a frame */
 static void ffm_write_data(AVFormatContext *s,
-                           uint8_t *buf, int size,
+                           const uint8_t *buf, int size,
                            int64_t pts, int first)
 {
     FFMContext *ffm = s->priv_data;
@@ -215,7 +215,7 @@ static int ffm_write_header(AVFormatContext *s)
 }
 
 static int ffm_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t force_pts)
 {
     AVStream *st = s->streams[stream_index];
     FFMStream *fst = st->priv_data;
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index 65bdf4b8d5..e6e3d7a011 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -242,7 +242,7 @@ static int flv_write_trailer(AVFormatContext *s)
 }
 
 static int flv_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int timestamp)
+                            const uint8_t *buf, int size, int64_t timestamp)
 {
     ByteIOContext *pb = &s->pb;
     AVCodecContext *enc = &s->streams[stream_index]->codec;
diff --git a/libavformat/gif.c b/libavformat/gif.c
index 1df8827a33..cd7cf9371f 100644
--- a/libavformat/gif.c
+++ b/libavformat/gif.c
@@ -220,12 +220,12 @@ static inline unsigned char gif_clut_index(uint8_t r, uint8_t g, uint8_t b)
 
 static int gif_image_write_image(ByteIOContext *pb, 
                                  int x1, int y1, int width, int height,
-                                 uint8_t *buf, int linesize, int pix_fmt)
+                                 const uint8_t *buf, int linesize, int pix_fmt)
 {
     PutBitContext p;
     uint8_t buffer[200]; /* 100 * 9 / 8 = 113 */
     int i, left, w, v;
-    uint8_t *ptr;
+    const uint8_t *ptr;
     /* image block */
 
     put_byte(pb, 0x2c);
@@ -331,7 +331,7 @@ static int gif_write_header(AVFormatContext *s)
 }
 
 static int gif_write_video(AVFormatContext *s, 
-                           AVCodecContext *enc, uint8_t *buf, int size)
+                           AVCodecContext *enc, const uint8_t *buf, int size)
 {
     ByteIOContext *pb = &s->pb;
     GIFContext *gif = s->priv_data;
@@ -366,7 +366,7 @@ static int gif_write_video(AVFormatContext *s,
 }
 
 static int gif_write_packet(AVFormatContext *s, int stream_index, 
-                           uint8_t *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t pts)
 {
     AVCodecContext *codec = &s->streams[stream_index]->codec;
     if (codec->codec_type == CODEC_TYPE_AUDIO)
diff --git a/libavformat/img.c b/libavformat/img.c
index 9048dabc90..0051271f62 100644
--- a/libavformat/img.c
+++ b/libavformat/img.c
@@ -301,7 +301,7 @@ static int img_write_header(AVFormatContext *s)
 }
 
 static int img_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t pts)
 {
     VideoData *img = s->priv_data;
     AVStream *st = s->streams[stream_index];
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 2e9444d78f..e3e612ff6c 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -675,7 +675,7 @@ static int Timestamp() {
 }
 
 static int mov_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t pts)
 {
     MOVContext *mov = s->priv_data;
     ByteIOContext *pb = &s->pb;
diff --git a/libavformat/mp3.c b/libavformat/mp3.c
index fa27283fc9..cd515cf06f 100644
--- a/libavformat/mp3.c
+++ b/libavformat/mp3.c
@@ -323,7 +323,7 @@ static int mp3_write_header(struct AVFormatContext *s)
 }
 
 static int mp3_write_packet(struct AVFormatContext *s, int stream_index,
-			    unsigned char *buf, int size, int force_pts)
+			    const uint8_t *buf, int size, int64_t pts)
 {
     put_buffer(&s->pb, buf, size);
     put_flush_packet(&s->pb);
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index 73f1b28622..d4af185d21 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -347,7 +347,7 @@ static void flush_packet(AVFormatContext *ctx, int stream_index, int last_pkt)
 }
 
 static int mpeg_mux_write_packet(AVFormatContext *ctx, int stream_index,
-                                 uint8_t *buf, int size, int pts)
+                                 const uint8_t *buf, int size, int64_t pts)
 {
     MpegMuxContext *s = ctx->priv_data;
     AVStream *st = ctx->streams[stream_index];
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 60520de540..9b1d9d36b4 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -22,7 +22,7 @@
 
 /* write DVB SI sections */
 
-static uint32_t crc_table[256] = {
+static const uint32_t crc_table[256] = {
 	0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
 	0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
 	0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7,
@@ -454,7 +454,7 @@ static void retransmit_si_info(AVFormatContext *s)
 }
 
 static int mpegts_write_packet(AVFormatContext *s, int stream_index,
-                               uint8_t *buf, int size, int pts1)
+                               const uint8_t *buf, int size, int64_t pts1)
 {
     AVStream *st = s->streams[stream_index];
     MpegTSWriteStream *ts_st = st->priv_data;
diff --git a/libavformat/mpjpeg.c b/libavformat/mpjpeg.c
index 62e2601aad..ab8166b16a 100644
--- a/libavformat/mpjpeg.c
+++ b/libavformat/mpjpeg.c
@@ -33,7 +33,7 @@ static int mpjpeg_write_header(AVFormatContext *s)
 }
 
 static int mpjpeg_write_packet(AVFormatContext *s, int stream_index, 
-                               uint8_t *buf, int size, int force_pts)
+                               const uint8_t *buf, int size, int64_t pts)
 {
     uint8_t buf1[256];
 
@@ -75,7 +75,7 @@ static int single_jpeg_write_header(AVFormatContext *s)
 }
 
 static int single_jpeg_write_packet(AVFormatContext *s, int stream_index,
-                            uint8_t *buf, int size, int force_pts)
+                                    const uint8_t *buf, int size, int64_t pts)
 {
     put_buffer(&s->pb, buf, size);
     put_flush_packet(&s->pb);
diff --git a/libavformat/nut.c b/libavformat/nut.c
index 9b9be7c37a..a1e98a20a4 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -344,7 +344,7 @@ static int nut_write_header(AVFormatContext *s)
 }
 
 static int nut_write_packet(AVFormatContext *s, int stream_index, 
-			    uint8_t *buf, int size, int force_pts)
+			    const uint8_t *buf, int size, int64_t pts)
 {
     NUTContext *nut = s->priv_data;
     ByteIOContext *bc = &s->pb;
@@ -372,7 +372,7 @@ static int nut_write_packet(AVFormatContext *s, int stream_index,
 
     put_packetheader(nut, bc, size+20);
     put_v(bc, stream_index);
-    put_s(bc, force_pts); /* lsb_timestamp */
+    put_s(bc, pts); /* lsb_timestamp */
     update_packetheader(nut, bc, size);
     
     put_buffer(bc, buf, size);
diff --git a/libavformat/raw.c b/libavformat/raw.c
index 00d9b784bd..1026a50bbd 100644
--- a/libavformat/raw.c
+++ b/libavformat/raw.c
@@ -25,7 +25,7 @@ static int raw_write_header(struct AVFormatContext *s)
 }
 
 static int raw_write_packet(struct AVFormatContext *s, int stream_index,
-			    unsigned char *buf, int size, int force_pts)
+			    const uint8_t *buf, int size, int64_t pts)
 {
     put_buffer(&s->pb, buf, size);
     put_flush_packet(&s->pb);
@@ -459,7 +459,7 @@ AVOutputFormat rawvideo_oformat = {
 
 static int null_write_packet(struct AVFormatContext *s, 
                              int stream_index,
-                             unsigned char *buf, int size, int force_pts)
+                             const uint8_t *buf, int size, int64_t pts)
 {
     return 0;
 }
diff --git a/libavformat/rm.c b/libavformat/rm.c
index e99ae8c870..2dcd5ef577 100644
--- a/libavformat/rm.c
+++ b/libavformat/rm.c
@@ -323,7 +323,7 @@ static int rm_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int rm_write_audio(AVFormatContext *s, uint8_t *buf, int size)
+static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size)
 {
     uint8_t *buf1;
     RMContext *rm = s->priv_data;
@@ -348,7 +348,7 @@ static int rm_write_audio(AVFormatContext *s, uint8_t *buf, int size)
     return 0;
 }
 
-static int rm_write_video(AVFormatContext *s, uint8_t *buf, int size)
+static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size)
 {
     RMContext *rm = s->priv_data;
     ByteIOContext *pb = &s->pb;
@@ -389,7 +389,7 @@ static int rm_write_video(AVFormatContext *s, uint8_t *buf, int size)
 }
 
 static int rm_write_packet(AVFormatContext *s, int stream_index, 
-                           uint8_t *buf, int size, int force_pts)
+                           const uint8_t *buf, int size, int64_t pts)
 {
     if (s->streams[stream_index]->codec.codec_type == 
         CODEC_TYPE_AUDIO)
diff --git a/libavformat/rtp.c b/libavformat/rtp.c
index 46e1fd88b4..113828475e 100644
--- a/libavformat/rtp.c
+++ b/libavformat/rtp.c
@@ -425,7 +425,7 @@ static void rtcp_send_sr(AVFormatContext *s1, int64_t ntp_time)
 
 /* send an rtp packet. sequence number is incremented, but the caller
    must update the timestamp itself */
-static void rtp_send_data(AVFormatContext *s1, uint8_t *buf1, int len)
+static void rtp_send_data(AVFormatContext *s1, const uint8_t *buf1, int len)
 {
     RTPContext *s = s1->priv_data;
 
@@ -451,7 +451,7 @@ static void rtp_send_data(AVFormatContext *s1, uint8_t *buf1, int len)
 /* send an integer number of samples and compute time stamp and fill
    the rtp send buffer before sending. */
 static void rtp_send_samples(AVFormatContext *s1,
-                             uint8_t *buf1, int size, int sample_size)
+                             const uint8_t *buf1, int size, int sample_size)
 {
     RTPContext *s = s1->priv_data;
     int len, max_packet_size, n;
@@ -484,7 +484,7 @@ static void rtp_send_samples(AVFormatContext *s1,
 /* NOTE: we suppose that exactly one frame is given as argument here */
 /* XXX: test it */
 static void rtp_send_mpegaudio(AVFormatContext *s1,
-                               uint8_t *buf1, int size)
+                               const uint8_t *buf1, int size)
 {
     RTPContext *s = s1->priv_data;
     AVStream *st = s1->streams[0];
@@ -540,7 +540,7 @@ static void rtp_send_mpegaudio(AVFormatContext *s1,
 /* NOTE: a single frame must be passed with sequence header if
    needed. XXX: use slices. */
 static void rtp_send_mpegvideo(AVFormatContext *s1,
-                               uint8_t *buf1, int size)
+                               const uint8_t *buf1, int size)
 {
     RTPContext *s = s1->priv_data;
     AVStream *st = s1->streams[0];
@@ -587,7 +587,7 @@ static void rtp_send_mpegvideo(AVFormatContext *s1,
 }
 
 static void rtp_send_raw(AVFormatContext *s1,
-                         uint8_t *buf1, int size)
+                         const uint8_t *buf1, int size)
 {
     RTPContext *s = s1->priv_data;
     AVStream *st = s1->streams[0];
@@ -613,7 +613,7 @@ static void rtp_send_raw(AVFormatContext *s1,
 
 /* write an RTP packet. 'buf1' must contain a single specific frame. */
 static int rtp_write_packet(AVFormatContext *s1, int stream_index,
-                            uint8_t *buf1, int size, int force_pts)
+                            const uint8_t *buf1, int size, int64_t pts)
 {
     RTPContext *s = s1->priv_data;
     AVStream *st = s1->streams[0];
@@ -630,7 +630,7 @@ static int rtp_write_packet(AVFormatContext *s1, int stream_index,
     if (s->first_packet || rtcp_bytes >= 28) {
         /* compute NTP time */
         /* XXX: 90 kHz timestamp hardcoded */
-        ntp_time = ((int64_t)force_pts << 28) / 5625;
+        ntp_time = (pts << 28) / 5625;
         rtcp_send_sr(s1, ntp_time); 
         s->last_octet_count = s->octet_count;
         s->first_packet = 0;
diff --git a/libavformat/swf.c b/libavformat/swf.c
index 2e2201f960..5a93ae509a 100644
--- a/libavformat/swf.c
+++ b/libavformat/swf.c
@@ -318,7 +318,7 @@ static int swf_write_header(AVFormatContext *s)
 }
 
 static int swf_write_video(AVFormatContext *s, 
-                           AVCodecContext *enc, uint8_t *buf, int size)
+                           AVCodecContext *enc, const uint8_t *buf, int size)
 {
     ByteIOContext *pb = &s->pb;
     static int tag_id = 0;
@@ -366,7 +366,7 @@ static int swf_write_video(AVFormatContext *s,
     return 0;
 }
 
-static int swf_write_audio(AVFormatContext *s, uint8_t *buf, int size)
+static int swf_write_audio(AVFormatContext *s, const uint8_t *buf, int size)
 {
     ByteIOContext *pb = &s->pb;
 
@@ -380,7 +380,7 @@ static int swf_write_audio(AVFormatContext *s, uint8_t *buf, int size)
 }
 
 static int swf_write_packet(AVFormatContext *s, int stream_index, 
-                           uint8_t *buf, int size, int force_pts)
+                           const uint8_t *buf, int size, int64_t pts)
 {
     AVCodecContext *codec = &s->streams[stream_index]->codec;
     if (codec->codec_type == CODEC_TYPE_AUDIO)
diff --git a/libavformat/wav.c b/libavformat/wav.c
index f71dd55bc7..a75cd41f71 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -191,7 +191,7 @@ static int wav_write_header(AVFormatContext *s)
 }
 
 static int wav_write_packet(AVFormatContext *s, int stream_index_ptr,
-                           uint8_t *buf, int size, int force_pts)
+                            const uint8_t *buf, int size, int64_t pts)
 {
     ByteIOContext *pb = &s->pb;
     put_buffer(pb, buf, size);
diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index c898436ce2..1c6e74b071 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -113,7 +113,7 @@ static int yuv4_write_header(AVFormatContext *s)
 }
 
 static int yuv4_write_packet(AVFormatContext *s, int stream_index,
-                             uint8_t *buf, int size, int force_pts)
+                             const uint8_t *buf, int size, int64_t pts)
 {
     AVStream *st = s->streams[stream_index];
     ByteIOContext *pb = &s->pb;