diff --git a/ffmpeg.c b/ffmpeg.c
index 289223c5af..366373d833 100644
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -230,9 +230,8 @@ typedef struct AVOutputStream {
     int frame_number;
     /* input pts and corresponding output pts
        for A/V sync */
-    double sync_ipts;
-    double sync_ipts_offset;
-    int64_t sync_opts;
+    double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
+    int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
     /* video only */
     int video_resample;      /* video_resample and video_crop are mutually exclusive */
     AVFrame pict_tmp;      /* temporary image for resampling */
@@ -447,12 +446,23 @@ static void do_audio_out(AVFormatContext *s,
         
         while (fifo_read(&ost->fifo, audio_buf, frame_bytes, 
                      &ost->fifo.rptr) == 0) {
+            AVPacket pkt;
+            av_init_packet(&pkt);
+
             ret = avcodec_encode_audio(enc, audio_out, audio_out_size, 
                                        (short *)audio_buf);
             audio_size += ret;
-            av_write_frame(s, ost->index, audio_out, ret);
+            pkt.stream_index= ost->index;
+            pkt.data= audio_out;
+            pkt.size= ret;
+            if(enc->coded_frame)
+                pkt.pts= enc->coded_frame->pts;
+            pkt.flags |= PKT_FLAG_KEY;
+            av_write_frame(s, &pkt);
         }
     } else {
+        AVPacket pkt;
+        av_init_packet(&pkt);
         /* output a pcm frame */
         /* XXX: change encoding codec API to avoid this ? */
         switch(enc->codec->id) {
@@ -468,7 +478,13 @@ static void do_audio_out(AVFormatContext *s,
         ret = avcodec_encode_audio(enc, audio_out, size_out, 
 				   (short *)buftmp);
         audio_size += ret;
-        av_write_frame(s, ost->index, audio_out, ret);
+        pkt.stream_index= ost->index;
+        pkt.data= audio_out;
+        pkt.size= ret;
+        if(enc->coded_frame)
+            pkt.pts= enc->coded_frame->pts;
+        pkt.flags |= PKT_FLAG_KEY;
+        av_write_frame(s, &pkt);
     }
 }
 
@@ -586,58 +602,17 @@ static void do_video_out(AVFormatContext *s,
 
     *frame_size = 0;
 
-    /* NOTE: the A/V sync is always done by considering the audio is
-       the master clock. It is suffisant for transcoding or playing,
-       but not for the general case */
-  if(sync_method){
-    if (audio_sync) {
-        /* compute the A-V delay and duplicate/remove frames if needed */
-        double adelta, vdelta, av_delay;
-
-        adelta = audio_sync->sync_ipts - ((double)audio_sync->sync_opts * 
-            audio_sync->st->time_base.num / audio_sync->st->time_base.den);
-
-        vdelta = ost->sync_ipts - ((double)ost->sync_opts *
-            ost->st->time_base.num / ost->st->time_base.den);
-
-        av_delay = adelta - vdelta;
-        if (av_delay < -AV_DELAY_MAX)
-            nb_frames = 2;
-        else if (av_delay > AV_DELAY_MAX)
-            nb_frames = 0;
-//        printf("adelta=%f vdelta=%f delay=%f nb=%d (A)\n", adelta, vdelta, av_delay, nb_frames);
-    } else {
+    if(sync_method){
         double vdelta;
-
-        vdelta = (double)(ost->st->pts.val) * ost->st->time_base.num / ost->st->time_base.den - (ost->sync_ipts - ost->sync_ipts_offset);
-        if (vdelta < 100 && vdelta > -100 && ost->sync_ipts_offset) {
-            if (vdelta < -AV_DELAY_MAX)
-                nb_frames = 2;
-            else if (vdelta > AV_DELAY_MAX)
-                nb_frames = 0;
-        } else {
-            ost->sync_ipts_offset -= vdelta;
-            if (!ost->sync_ipts_offset)
-                ost->sync_ipts_offset = 0.000001; /* one microsecond */
-        }
-//        printf("delay=%f nb=%d (V)\n",vdelta, nb_frames);
+        vdelta = ost->sync_ipts * enc->frame_rate / enc->frame_rate_base - ost->sync_opts;
+        //FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
+        if (vdelta < -1.1)
+            nb_frames = 0;
+        else if (vdelta > 1.1)
+            nb_frames = 2;
+//printf("vdelta:%f, ost->sync_opts:%lld, ost->sync_ipts:%f nb_frames:%d\n", vdelta, ost->sync_opts, ost->sync_ipts, nb_frames);
     }
-  }
-    
-#if defined(AVSYNC_DEBUG)
-    {
-        static char *action[] = { "drop frame", "copy frame", "dup frame" };
-        if (audio_sync && verbose >=0) {
-            fprintf(stderr, "Input APTS %12.6f, output APTS %12.6f, ",
-                    (double) audio_sync->sync_ipts, 
-                    (double) audio_sync->st->pts.val * st->time_base.num / st->time_base.den);
-            fprintf(stderr, "Input VPTS %12.6f, output VPTS %12.6f: %s\n",
-                    (double) ost->sync_ipts, 
-                    (double) ost->st->pts.val * st->time_base.num / st->time_base.den,
-                    action[nb_frames]);
-        }
-    }
-#endif
+    ost->sync_opts+= nb_frames;
 
     if (nb_frames <= 0) 
         return;
@@ -779,14 +754,24 @@ static void do_video_out(AVFormatContext *s,
     /* duplicates frame if needed */
     /* XXX: pb because no interleaving */
     for(i=0;i<nb_frames;i++) {
+        AVPacket pkt;
+        av_init_packet(&pkt);
+        pkt.stream_index= ost->index;
+
         if (s->oformat->flags & AVFMT_RAWPICTURE) {
             /* raw pictures are written as AVPicture structure to
                avoid any copies. We support temorarily the older
                method. */
             AVFrame* old_frame = enc->coded_frame;
-	    enc->coded_frame = dec->coded_frame;
-            av_write_frame(s, ost->index, 
-                           (uint8_t *)final_picture, sizeof(AVPicture));
+	    enc->coded_frame = dec->coded_frame; //FIXME/XXX remove this hack
+            pkt.data= (uint8_t *)final_picture;
+            pkt.size=  sizeof(AVPicture);
+            if(dec->coded_frame)
+                pkt.pts= dec->coded_frame->pts;
+            if(dec->coded_frame && dec->coded_frame->key_frame)
+                pkt.flags |= PKT_FLAG_KEY;
+
+            av_write_frame(s, &pkt);
 	    enc->coded_frame = old_frame;
         } else {
             AVFrame big_picture;
@@ -815,14 +800,22 @@ static void do_video_out(AVFormatContext *s,
                                        video_buffer, VIDEO_BUFFER_SIZE,
                                        &big_picture);
             //enc->frame_number = enc->real_pict_num;
-            av_write_frame(s, ost->index, video_buffer, ret);
-            *frame_size = ret;
-            //fprintf(stderr,"\nFrame: %3d %3d size: %5d type: %d",
-            //        enc->frame_number-1, enc->real_pict_num, ret,
-            //        enc->pict_type);
-            /* if two pass, output log */
-            if (ost->logfile && enc->stats_out) {
-                fprintf(ost->logfile, "%s", enc->stats_out);
+            if(ret){
+                pkt.data= video_buffer;
+                pkt.size= ret;
+                if(enc->coded_frame)
+                    pkt.pts= enc->coded_frame->pts;
+                if(enc->coded_frame && enc->coded_frame->key_frame)
+                    pkt.flags |= PKT_FLAG_KEY;
+                av_write_frame(s, &pkt);
+                *frame_size = ret;
+                //fprintf(stderr,"\nFrame: %3d %3d size: %5d type: %d",
+                //        enc->frame_number-1, enc->real_pict_num, ret,
+                //        enc->pict_type);
+                /* if two pass, output log */
+                if (ost->logfile && enc->stats_out) {
+                    fprintf(ost->logfile, "%s", enc->stats_out);
+                }
             }
         }
         ost->frame_number++;
@@ -872,7 +865,7 @@ static void do_video_stats(AVFormatContext *os, AVOutputStream *ost,
         
         fprintf(fvstats,"f_size= %6d ", frame_size);
         /* compute pts value */
-        ti1 = (double)ost->st->pts.val * ost->st->time_base.num / ost->st->time_base.den;
+        ti1 = (double)ost->sync_opts *enc->frame_rate_base / enc->frame_rate;
         if (ti1 < 0.01)
             ti1 = 0.01;
     
@@ -1003,8 +996,8 @@ static int output_packet(AVInputStream *ist, int ist_index,
     short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
     void *buffer_to_free;
     
-    if (pkt && pkt->pts != AV_NOPTS_VALUE) {
-        ist->next_pts = ist->pts = pkt->pts;
+    if (pkt && pkt->pts != AV_NOPTS_VALUE) { //FIXME seems redundant, as libavformat does this too
+        ist->next_pts = ist->pts = pkt->dts;
     } else {
         ist->pts = ist->next_pts;
     }
@@ -1122,10 +1115,6 @@ static int output_packet(AVInputStream *ist, int ist_index,
 #endif
                         /* set the input output pts pairs */
                         ost->sync_ipts = (double)ist->pts / AV_TIME_BASE;
-                        /* XXX: take into account the various fifos,
-                           in particular for audio */
-                        ost->sync_opts = ost->st->pts.val;
-                        //printf("ipts=%lld sync_ipts=%f sync_opts=%lld pts.val=%lld pkt->pts=%lld\n", ist->pts, ost->sync_ipts, ost->sync_opts, ost->st->pts.val, pkt->pts); 
 
                         if (ost->encoding_needed) {
                             switch(ost->st->codec.codec_type) {
@@ -1157,22 +1146,29 @@ static int output_packet(AVInputStream *ist, int ist_index,
                                 av_abort();
                             }
                         } else {
-                            AVFrame avframe;
-                                                
+                            AVFrame avframe; //FIXME/XXX remove this
+                            AVPacket opkt;
+                            av_init_packet(&opkt);
+
                             /* no reencoding needed : output the packet directly */
                             /* force the input stream PTS */
                         
                             avcodec_get_frame_defaults(&avframe);
                             ost->st->codec.coded_frame= &avframe;
                             avframe.key_frame = pkt->flags & PKT_FLAG_KEY; 
-                            ost->st->pts.val= av_rescale(ist->pts, ost->st->time_base.den, ost->st->time_base.num*AV_TIME_BASE);
 
                             if(ost->st->codec.codec_type == CODEC_TYPE_AUDIO)
                                 audio_size += data_size;
                             else if (ost->st->codec.codec_type == CODEC_TYPE_VIDEO)
                                 video_size += data_size;
 
-                            av_write_frame(os, ost->index, data_buf, data_size);
+                            opkt.stream_index= ost->index;
+                            opkt.data= data_buf;
+                            opkt.size= data_size;
+                            opkt.pts= ist->pts; //FIXME dts vs. pts
+                            opkt.flags= pkt->flags;
+                            
+                            av_write_frame(os, &opkt);
                             ost->st->codec.frame_number++;
                             ost->frame_number++;
                         }
diff --git a/ffserver.c b/ffserver.c
index b81b5c8865..7423abc07b 100644
--- a/ffserver.c
+++ b/ffserver.c
@@ -2163,7 +2163,7 @@ static int http_prepare_data(HTTPContext *c)
                             /* XXX: potential leak */
                             return -1;
                         }
-                        if (av_write_frame(ctx, pkt.stream_index, pkt.data, pkt.size)) {
+                        if (av_write_frame(ctx, &pkt)) {
                             c->state = HTTPSTATE_SEND_DATA_TRAILER;
                         }
                         
diff --git a/libavformat/amr.c b/libavformat/amr.c
index 67a7748bda..760eb995ae 100644
--- a/libavformat/amr.c
+++ b/libavformat/amr.c
@@ -51,10 +51,9 @@ static int amr_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int amr_write_packet(AVFormatContext *s, int stream_index_ptr,
-                           uint8_t *buf, int size, int force_pts)
+static int amr_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    put_buffer(&s->pb, buf, size);
+    put_buffer(&s->pb, pkt->data, pkt->size);
     put_flush_packet(&s->pb);
     return 0;
 }
diff --git a/libavformat/asf-enc.c b/libavformat/asf-enc.c
index 3dcf43e862..9e87909858 100644
--- a/libavformat/asf-enc.c
+++ b/libavformat/asf-enc.c
@@ -310,7 +310,7 @@ static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data
     put_le64(pb, asf->nb_packets); /* number of packets */
     put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
     put_le64(pb, asf->duration); /* duration (in 100ns units) */
-    put_le32(pb, 0); /* start time stamp */
+    put_le32(pb, preroll_time); /* start time stamp */
     put_le32(pb, 0); /* ??? */
     put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
     put_le32(pb, asf->packet_size); /* packet size */
@@ -686,17 +686,17 @@ static void put_frame(
     stream->seq++;
 }
 
-static int asf_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t timestamp)
+static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     ASFContext *asf = s->priv_data;
     ASFStream *stream;
     int64_t duration;
     AVCodecContext *codec;
 
-    codec = &s->streams[stream_index]->codec;
-    stream = &asf->streams[stream_index];
+    codec = &s->streams[pkt->stream_index]->codec;
+    stream = &asf->streams[pkt->stream_index];
 
+    //XXX /FIXME use duration from AVPacket
     if (codec->codec_type == CODEC_TYPE_AUDIO) {
         duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
             codec->sample_rate;
@@ -706,7 +706,7 @@ static int asf_write_packet(AVFormatContext *s, int stream_index,
     if (duration > asf->duration)
         asf->duration = duration;
 
-    put_frame(s, stream, timestamp, buf, size);
+    put_frame(s, stream, pkt->pts, pkt->data, pkt->size);
     return 0;
 }
 
diff --git a/libavformat/au.c b/libavformat/au.c
index c9837f7c76..5515c3257b 100644
--- a/libavformat/au.c
+++ b/libavformat/au.c
@@ -72,11 +72,10 @@ static int au_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int au_write_packet(AVFormatContext *s, int stream_index_ptr,
-                           const uint8_t *buf, int size, int64_t pts)
+static int au_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     ByteIOContext *pb = &s->pb;
-    put_buffer(pb, buf, size);
+    put_buffer(pb, pkt->data, pkt->size);
     return 0;
 }
 
diff --git a/libavformat/audio.c b/libavformat/audio.c
index 00f705c372..e3e5888e9b 100644
--- a/libavformat/audio.c
+++ b/libavformat/audio.c
@@ -164,11 +164,12 @@ static int audio_write_header(AVFormatContext *s1)
     }
 }
 
-static int audio_write_packet(AVFormatContext *s1, int stream_index,
-                              const uint8_t *buf, int size, int64_t pts)
+static int audio_write_packet(AVFormatContext *s1, AVPacket *pkt)
 {
     AudioData *s = s1->priv_data;
     int len, ret;
+    int size= pkt->size;
+    uint8_t *buf= pkt->data;
 
     while (size > 0) {
         len = AUDIO_BLOCK_SIZE - s->buffer_ptr;
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 966d2fd096..ae1f9fe69d 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -5,7 +5,7 @@
 extern "C" {
 #endif
 
-#define LIBAVFORMAT_BUILD       4614
+#define LIBAVFORMAT_BUILD       4615
 
 #define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
 #define LIBAVFORMAT_VERSION     FFMPEG_VERSION
@@ -131,9 +131,7 @@ typedef struct AVOutputFormat {
     enum CodecID audio_codec; /* default audio codec */
     enum CodecID video_codec; /* default video codec */
     int (*write_header)(struct AVFormatContext *);
-    int (*write_packet)(struct AVFormatContext *, 
-                        int stream_index,
-                        const uint8_t *buf, int size, int64_t pts);
+    int (*write_packet)(struct AVFormatContext *, AVPacket *pkt);
     int (*write_trailer)(struct AVFormatContext *);
     /* can use flags: AVFMT_NOFILE, AVFMT_NEEDNUMBER */
     int flags;
@@ -558,8 +556,8 @@ int av_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts
 /* media file output */
 int av_set_parameters(AVFormatContext *s, AVFormatParameters *ap);
 int av_write_header(AVFormatContext *s);
-int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf, 
-                   int size);
+int av_write_frame(AVFormatContext *s, AVPacket *pkt);
+
 int av_write_trailer(AVFormatContext *s);
 
 void dump_format(AVFormatContext *ic,
diff --git a/libavformat/avienc.c b/libavformat/avienc.c
index 7b3857fd3d..86f0e83446 100644
--- a/libavformat/avienc.c
+++ b/libavformat/avienc.c
@@ -607,14 +607,15 @@ static int avi_write_idx1(AVFormatContext *s)
     return 0;
 }
 
-static int avi_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t pts)
+static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     AVIContext *avi = s->priv_data;
     ByteIOContext *pb = &s->pb;
     unsigned char tag[5];
-    unsigned int flags;
+    unsigned int flags=0;
     AVCodecContext *enc;
+    const int stream_index= pkt->stream_index;
+    int size= pkt->size;
 
     if (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE) { 
         avi_write_ix(s);
@@ -629,11 +630,11 @@ static int avi_write_packet(AVFormatContext *s, int stream_index,
     
     enc = &s->streams[stream_index]->codec;
     avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
+    if(pkt->flags&PKT_FLAG_KEY)
+        flags = 0x10;
     if (enc->codec_type == CODEC_TYPE_AUDIO) {
        avi->audio_strm_length[stream_index] += size;
-       flags = 0x10;
-    } else
-       flags = enc->coded_frame->key_frame ? 0x10 : 0x00;
+    }
 
     if (!url_is_streamed(&s->pb)) {
         AVIIndex* idx = &avi->indexes[stream_index];
@@ -657,7 +658,7 @@ static int avi_write_packet(AVFormatContext *s, int stream_index,
     
     put_buffer(pb, tag, 4);
     put_le32(pb, size);
-    put_buffer(pb, buf, size);
+    put_buffer(pb, pkt->data, size);
     if (size & 1)
         put_byte(pb, 0);
 
diff --git a/libavformat/crc.c b/libavformat/crc.c
index 1b8d6a4df3..ee915debc5 100644
--- a/libavformat/crc.c
+++ b/libavformat/crc.c
@@ -71,12 +71,10 @@ static int crc_write_header(struct AVFormatContext *s)
     return 0;
 }
 
-static int crc_write_packet(struct AVFormatContext *s, 
-                            int stream_index,
-                            const uint8_t *buf, int size, int64_t pts)
+static int crc_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     CRCState *crc = s->priv_data;
-    crc->crcval = update_adler32(crc->crcval, buf, size);
+    crc->crcval = update_adler32(crc->crcval, pkt->data, pkt->size);
     return 0;
 }
 
diff --git a/libavformat/dv.c b/libavformat/dv.c
index ec87068a9f..8b029eb0e2 100644
--- a/libavformat/dv.c
+++ b/libavformat/dv.c
@@ -888,15 +888,13 @@ static int dv_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int dv_write_packet(struct AVFormatContext *s, 
-                           int stream_index,
-                           const uint8_t *buf, int size, int64_t pts)
+static int dv_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     uint8_t* frame;
     int fsize;
    
-    fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[stream_index],
-                              buf, size, &frame);
+    fsize = dv_assemble_frame((DVMuxContext *)s->priv_data, s->streams[pkt->stream_index],
+                              pkt->data, pkt->size, &frame);
     if (fsize > 0) {
         put_buffer(&s->pb, frame, fsize); 
         put_flush_packet(&s->pb);
diff --git a/libavformat/ffm.c b/libavformat/ffm.c
index 651abaa8f2..fca46b170f 100644
--- a/libavformat/ffm.c
+++ b/libavformat/ffm.c
@@ -222,15 +222,16 @@ static int ffm_write_header(AVFormatContext *s)
     return -1;
 }
 
-static int ffm_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t force_pts)
+static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    AVStream *st = s->streams[stream_index];
+    AVStream *st = s->streams[pkt->stream_index];
     FFMStream *fst = st->priv_data;
     int64_t pts;
     uint8_t header[FRAME_HEADER_SIZE];
     int duration;
+    int size= pkt->size;
 
+    //XXX/FIXME use duration from pkt
     if (st->codec.codec_type == CODEC_TYPE_AUDIO) {
         duration = ((float)st->codec.frame_size / st->codec.sample_rate * 1000000.0);
     } else {
@@ -239,9 +240,9 @@ static int ffm_write_packet(AVFormatContext *s, int stream_index,
 
     pts = fst->pts;
     /* packet size & key_frame */
-    header[0] = stream_index;
+    header[0] = pkt->stream_index;
     header[1] = 0;
-    if (st->codec.coded_frame->key_frame) //if st->codec.coded_frame==NULL then there is a bug somewhere else
+    if (pkt->flags & PKT_FLAG_KEY)
         header[1] |= FLAG_KEY_FRAME;
     header[2] = (size >> 16) & 0xff;
     header[3] = (size >> 8) & 0xff;
@@ -250,7 +251,7 @@ static int ffm_write_packet(AVFormatContext *s, int stream_index,
     header[6] = (duration >> 8) & 0xff;
     header[7] = duration & 0xff;
     ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1);
-    ffm_write_data(s, buf, size, pts, 0);
+    ffm_write_data(s, pkt->data, size, pts, 0);
 
     fst->pts += duration;
     return 0;
@@ -467,6 +468,9 @@ static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
         fst = av_mallocz(sizeof(FFMStream));
         if (!fst)
             goto fail;
+            
+        av_set_pts_info(st, 64, 1, 1000000);
+            
         st->priv_data = fst;
 
         codec = &st->codec;
diff --git a/libavformat/flvenc.c b/libavformat/flvenc.c
index a44ebd966d..aa1308ce2d 100644
--- a/libavformat/flvenc.c
+++ b/libavformat/flvenc.c
@@ -239,18 +239,19 @@ static int flv_write_trailer(AVFormatContext *s)
     return 0;
 }
 
-static int flv_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t timestamp)
+static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     ByteIOContext *pb = &s->pb;
-    AVCodecContext *enc = &s->streams[stream_index]->codec;
+    AVCodecContext *enc = &s->streams[pkt->stream_index]->codec;
     FLVContext *flv = s->priv_data;
     FLVFrame *frame = av_malloc(sizeof(FLVFrame));
+    int size= pkt->size;
+    uint8_t *buf= pkt->data;
 
     frame->next = 0;
     frame->size = size;
     frame->data = av_malloc(size);
-    frame->timestamp = timestamp;
+    frame->timestamp = pkt->pts;
     frame->reserved= flv->reserved;
     memcpy(frame->data,buf,size);
     
@@ -259,7 +260,7 @@ static int flv_write_packet(AVFormatContext *s, int stream_index,
     if (enc->codec_type == CODEC_TYPE_VIDEO) {
         frame->type = 9;
         frame->flags = 2; // choose h263
-        frame->flags |= enc->coded_frame->key_frame ? 0x10 : 0x20; // add keyframe indicator
+        frame->flags |= pkt->flags & PKT_FLAG_KEY ? 0x10 : 0x20; // add keyframe indicator
         //frame->timestamp = ( ( flv->frameCount * (int64_t)FRAME_RATE_BASE * (int64_t)1000 ) / (int64_t)enc->frame_rate );
         //printf("%08x %f %f\n",frame->timestamp,(double)enc->frame_rate/(double)FRAME_RATE_BASE,1000*(double)FRAME_RATE_BASE/(double)enc->frame_rate);
         flv->hasVideo = 1;
@@ -306,7 +307,7 @@ static int flv_write_packet(AVFormatContext *s, int stream_index,
 
         assert(size);
         if ( flv->initDelay == -1 ) {
-            flv->initDelay = timestamp;
+            flv->initDelay = pkt->pts;
         }
 
         frame->type = 8;
diff --git a/libavformat/gif.c b/libavformat/gif.c
index 7867913da2..3a5f041e61 100644
--- a/libavformat/gif.c
+++ b/libavformat/gif.c
@@ -364,14 +364,13 @@ static int gif_write_video(AVFormatContext *s,
     return 0;
 }
 
-static int gif_write_packet(AVFormatContext *s, int stream_index, 
-                            const uint8_t *buf, int size, int64_t pts)
+static int gif_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    AVCodecContext *codec = &s->streams[stream_index]->codec;
+    AVCodecContext *codec = &s->streams[pkt->stream_index]->codec;
     if (codec->codec_type == CODEC_TYPE_AUDIO)
         return 0; /* just ignore audio */
     else
-        return gif_write_video(s, codec, buf, size);
+        return gif_write_video(s, codec, pkt->data, pkt->size);
 }
 
 static int gif_write_trailer(AVFormatContext *s)
diff --git a/libavformat/img.c b/libavformat/img.c
index 9c47d38626..468cb6e2f0 100644
--- a/libavformat/img.c
+++ b/libavformat/img.c
@@ -300,11 +300,10 @@ static int img_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int img_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t pts)
+static int img_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     VideoData *img = s->priv_data;
-    AVStream *st = s->streams[stream_index];
+    AVStream *st = s->streams[pkt->stream_index];
     ByteIOContext pb1, *pb;
     AVPicture *picture;
     int width, height, ret;
@@ -314,7 +313,7 @@ static int img_write_packet(AVFormatContext *s, int stream_index,
     width = st->codec.width;
     height = st->codec.height;
     
-    picture = (AVPicture *)buf;
+    picture = (AVPicture *)pkt->data;
 
     if (!img->is_pipe) {
         if (get_frame_filename(filename, sizeof(filename), 
diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 0e3fb6a9de..0315d18b69 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -950,15 +950,15 @@ static int mov_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int mov_write_packet(AVFormatContext *s, int stream_index,
-                            const uint8_t *buf, int size, int64_t pts)
+static int mov_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     MOVContext *mov = s->priv_data;
     ByteIOContext *pb = &s->pb;
-    AVCodecContext *enc = &s->streams[stream_index]->codec;
-    MOVTrack* trk = &mov->tracks[stream_index];
+    AVCodecContext *enc = &s->streams[pkt->stream_index]->codec;
+    MOVTrack* trk = &mov->tracks[pkt->stream_index];
     int cl, id;
     unsigned int samplesInChunk = 0;
+    int size= pkt->size;
 
     if (url_is_streamed(&s->pb)) return 0; /* Can't handle that */
     if (!size) return 0; /* Discard 0 sized packets */
@@ -974,7 +974,7 @@ static int mov_write_packet(AVFormatContext *s, int stream_index,
             int len = 0;
 
             while (len < size && samplesInChunk < 100) {
-                len += packed_size[(buf[len] >> 3) & 0x0F];
+                len += packed_size[(pkt->data[len] >> 3) & 0x0F];
                 samplesInChunk++;
             }
         }
@@ -1021,8 +1021,8 @@ static int mov_write_packet(AVFormatContext *s, int stream_index,
     trk->cluster[cl][id].size = size;
     trk->cluster[cl][id].entries = samplesInChunk;
     if(enc->codec_type == CODEC_TYPE_VIDEO) {
-        trk->cluster[cl][id].key_frame = enc->coded_frame->key_frame;
-        if(enc->coded_frame->pict_type == FF_I_TYPE)
+        trk->cluster[cl][id].key_frame = !!(pkt->flags & PKT_FLAG_KEY);
+        if(trk->cluster[cl][id].key_frame)
             trk->hasKeyframes = 1;
     }
     trk->enc = enc;
@@ -1030,7 +1030,7 @@ static int mov_write_packet(AVFormatContext *s, int stream_index,
     trk->sampleCount += samplesInChunk;
     trk->mdat_size += size;
 
-    put_buffer(pb, buf, size);
+    put_buffer(pb, pkt->data, size);
 
     put_flush_packet(pb);
     return 0;
diff --git a/libavformat/mp3.c b/libavformat/mp3.c
index 0da8a400e9..bb6deb2f3a 100644
--- a/libavformat/mp3.c
+++ b/libavformat/mp3.c
@@ -324,10 +324,9 @@ static int mp3_write_header(struct AVFormatContext *s)
     return 0;
 }
 
-static int mp3_write_packet(struct AVFormatContext *s, int stream_index,
-			    const uint8_t *buf, int size, int64_t pts)
+static int mp3_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
-    put_buffer(&s->pb, buf, size);
+    put_buffer(&s->pb, pkt->data, pkt->size);
     put_flush_packet(&s->pb);
     return 0;
 }
diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
index e0060584c6..ffe19ea6ec 100644
--- a/libavformat/mpeg.c
+++ b/libavformat/mpeg.c
@@ -912,17 +912,22 @@ static int64_t update_scr(AVFormatContext *ctx,int stream_index,int64_t pts)
 }    
 
 
-static int mpeg_mux_write_packet(AVFormatContext *ctx, int stream_index,
-                                 const uint8_t *buf, int size, 
-                                 int64_t timestamp)
+static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
 {
     MpegMuxContext *s = ctx->priv_data;
+    int stream_index= pkt->stream_index;
+    int size= pkt->size;
+    uint8_t *buf= pkt->data;
     AVStream *st = ctx->streams[stream_index];
     StreamInfo *stream = st->priv_data;
     int64_t pts, dts, new_start_pts, new_start_dts;
     int len, avail_size;
     
-    compute_pts_dts(st, &pts, &dts, timestamp);
+    //XXX/FIXME this is and always was broken
+//    compute_pts_dts(st, &pts, &dts, pkt->pts);
+
+    pts= pkt->pts;
+    dts= pkt->dts;
 
     if(s->is_svcd) {
         /* offset pts and dts slightly into the future to be able
diff --git a/libavformat/mpegtsenc.c b/libavformat/mpegtsenc.c
index 7a20f8525a..fbbb83db03 100644
--- a/libavformat/mpegtsenc.c
+++ b/libavformat/mpegtsenc.c
@@ -549,10 +549,11 @@ static void mpegts_write_pes(AVFormatContext *s, AVStream *st,
     put_flush_packet(&s->pb);
 }
 
-static int mpegts_write_packet(AVFormatContext *s, int stream_index,
-                               const uint8_t *buf, int size, int64_t pts1)
+static int mpegts_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    AVStream *st = s->streams[stream_index];
+    AVStream *st = s->streams[pkt->stream_index];
+    int size= pkt->size;
+    uint8_t *buf= pkt->data;
     MpegTSWriteStream *ts_st = st->priv_data;
     int len;
 
@@ -565,7 +566,7 @@ static int mpegts_write_packet(AVFormatContext *s, int stream_index,
         size -= len;
         ts_st->payload_index += len;
         if (ts_st->payload_pts == AV_NOPTS_VALUE)
-            ts_st->payload_pts = pts1;
+            ts_st->payload_pts = pkt->pts;
         if (ts_st->payload_index >= DEFAULT_PES_PAYLOAD_SIZE) {
             mpegts_write_pes(s, st, ts_st->payload, ts_st->payload_index,
                              ts_st->payload_pts);
diff --git a/libavformat/mpjpeg.c b/libavformat/mpjpeg.c
index 434e519d50..da61c0726a 100644
--- a/libavformat/mpjpeg.c
+++ b/libavformat/mpjpeg.c
@@ -33,14 +33,13 @@ static int mpjpeg_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int mpjpeg_write_packet(AVFormatContext *s, int stream_index, 
-                               const uint8_t *buf, int size, int64_t pts)
+static int mpjpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     uint8_t buf1[256];
 
     snprintf(buf1, sizeof(buf1), "Content-type: image/jpeg\n\n");
     put_buffer(&s->pb, buf1, strlen(buf1));
-    put_buffer(&s->pb, buf, size);
+    put_buffer(&s->pb, pkt->data, pkt->size);
 
     snprintf(buf1, sizeof(buf1), "\n--%s\n", BOUNDARY_TAG);
     put_buffer(&s->pb, buf1, strlen(buf1));
@@ -75,10 +74,9 @@ static int single_jpeg_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int single_jpeg_write_packet(AVFormatContext *s, int stream_index,
-                                    const uint8_t *buf, int size, int64_t pts)
+static int single_jpeg_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    put_buffer(&s->pb, buf, size);
+    put_buffer(&s->pb, pkt->data, pkt->size);
     put_flush_packet(&s->pb);
     return 1; /* no more data can be sent */
 }
diff --git a/libavformat/nut.c b/libavformat/nut.c
index cb327675fb..22999ec975 100644
--- a/libavformat/nut.c
+++ b/libavformat/nut.c
@@ -691,25 +691,22 @@ static int64_t lsb2full(StreamContext *stream, int64_t lsb){
     return  ((lsb - delta)&mask) + delta;
 }
 
-static int nut_write_packet(AVFormatContext *s, int stream_index, 
-			    const uint8_t *buf, int size, int64_t pts)
+static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     NUTContext *nut = s->priv_data;
-    StreamContext *stream= &nut->stream[stream_index];
+    StreamContext *stream= &nut->stream[pkt->stream_index];
     ByteIOContext *bc = &s->pb;
     int key_frame = 0, full_pts=0;
     AVCodecContext *enc;
     int64_t coded_pts;
     int frame_type, best_length, frame_code, flags, i, size_mul, size_lsb, time_delta;
     const int64_t frame_start= url_ftell(bc);
+    int64_t pts= pkt->pts;
+    int size= pkt->size;
+    int stream_index= pkt->stream_index;
 
-    if (stream_index > s->nb_streams)
-	return 1;
-        
     enc = &s->streams[stream_index]->codec;
-    key_frame = enc->coded_frame->key_frame;
-    if(enc->coded_frame->pts != AV_NOPTS_VALUE)
-        pts= av_rescale(enc->coded_frame->pts, stream->rate_num, stream->rate_den*(int64_t)AV_TIME_BASE); //FIXME XXX HACK
+    key_frame = !!(pkt->flags & PKT_FLAG_KEY);
     
     frame_type=0;
     if(frame_start + size + 20 - FFMAX(nut->packet_start[1], nut->packet_start[2]) > MAX_DISTANCE)
@@ -808,7 +805,7 @@ static int nut_write_packet(AVFormatContext *s, int stream_index,
         assert(frame_type > 1);
     }
     
-    put_buffer(bc, buf, size);
+    put_buffer(bc, pkt->data, size);
 
     update(nut, stream_index, frame_start, frame_type, frame_code, key_frame, size, pts);
     
diff --git a/libavformat/ogg.c b/libavformat/ogg.c
index 82354c6cdd..3d90868a02 100644
--- a/libavformat/ogg.c
+++ b/libavformat/ogg.c
@@ -62,16 +62,15 @@ static int ogg_write_header(AVFormatContext *avfcontext)
     return 0 ;
 }
 
-static int ogg_write_packet(AVFormatContext *avfcontext,
-			    int stream_index,
-			    const uint8_t *buf, int size, int64_t pts)
+static int ogg_write_packet(AVFormatContext *avfcontext, AVPacket *pkt)
 {
     OggContext *context = avfcontext->priv_data ;
-    AVCodecContext *avctx= &avfcontext->streams[stream_index]->codec;
+    AVCodecContext *avctx= &avfcontext->streams[pkt->stream_index]->codec;
     ogg_packet *op= &context->op;
     ogg_page og ;
+    int64_t pts;
 
-    pts= av_rescale(pts, avctx->sample_rate, AV_TIME_BASE);
+    pts= av_rescale(pkt->pts, avctx->sample_rate, AV_TIME_BASE);
 
 //    av_log(avfcontext, AV_LOG_DEBUG, "M%d\n", size);
 
@@ -86,8 +85,8 @@ static int ogg_write_packet(AVFormatContext *avfcontext,
 	context->header_handled = 1 ;
     }
 
-    op->packet = (uint8_t*) buf;
-    op->bytes  = size;
+    op->packet = (uint8_t*) pkt->data;
+    op->bytes  = pkt->size;
     op->b_o_s  = op->packetno == 0;
     op->granulepos= pts;
 
diff --git a/libavformat/raw.c b/libavformat/raw.c
index 1c65f3aaad..fbdbb7aa1c 100644
--- a/libavformat/raw.c
+++ b/libavformat/raw.c
@@ -25,10 +25,9 @@ static int raw_write_header(struct AVFormatContext *s)
     return 0;
 }
 
-static int raw_write_packet(struct AVFormatContext *s, int stream_index,
-			    const uint8_t *buf, int size, int64_t pts)
+static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
-    put_buffer(&s->pb, buf, size);
+    put_buffer(&s->pb, pkt->data, pkt->size);
     put_flush_packet(&s->pb);
     return 0;
 }
@@ -551,9 +550,7 @@ AVOutputFormat rawvideo_oformat = {
 #endif //CONFIG_ENCODERS
 
 #ifdef CONFIG_ENCODERS
-static int null_write_packet(struct AVFormatContext *s, 
-                             int stream_index,
-                             const uint8_t *buf, int size, int64_t pts)
+static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
 {
     return 0;
 }
diff --git a/libavformat/rm.c b/libavformat/rm.c
index 7942337541..828921822c 100644
--- a/libavformat/rm.c
+++ b/libavformat/rm.c
@@ -389,14 +389,13 @@ static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size)
     return 0;
 }
 
-static int rm_write_packet(AVFormatContext *s, int stream_index, 
-                           const uint8_t *buf, int size, int64_t pts)
+static int rm_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    if (s->streams[stream_index]->codec.codec_type == 
+    if (s->streams[pkt->stream_index]->codec.codec_type == 
         CODEC_TYPE_AUDIO)
-        return rm_write_audio(s, buf, size);
+        return rm_write_audio(s, pkt->data, pkt->size);
     else
-        return rm_write_video(s, buf, size);
+        return rm_write_video(s, pkt->data, pkt->size);
 }
         
 static int rm_write_trailer(AVFormatContext *s)
diff --git a/libavformat/rtp.c b/libavformat/rtp.c
index 5d4884d8f7..31e4a21dc1 100644
--- a/libavformat/rtp.c
+++ b/libavformat/rtp.c
@@ -669,16 +669,17 @@ static void rtp_send_mpegts_raw(AVFormatContext *s1,
 }
 
 /* write an RTP packet. 'buf1' must contain a single specific frame. */
-static int rtp_write_packet(AVFormatContext *s1, int stream_index,
-                            const uint8_t *buf1, int size, int64_t pts)
+static int rtp_write_packet(AVFormatContext *s1, AVPacket *pkt)
 {
     RTPDemuxContext *s = s1->priv_data;
     AVStream *st = s1->streams[0];
     int rtcp_bytes;
     int64_t ntp_time;
+    int size= pkt->size;
+    uint8_t *buf1= pkt->data;
     
 #ifdef DEBUG
-    printf("%d: write len=%d\n", stream_index, size);
+    printf("%d: write len=%d\n", pkt->stream_index, size);
 #endif
 
     /* XXX: mpeg pts hardcoded. RTCP send every 0.5 seconds */
@@ -687,7 +688,7 @@ 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 = (pts << 28) / 5625;
+        ntp_time = (pkt->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 3f5ddd1678..798c9b1ee3 100644
--- a/libavformat/swf.c
+++ b/libavformat/swf.c
@@ -700,14 +700,13 @@ static int swf_write_audio(AVFormatContext *s,
     return 0;
 }
 
-static int swf_write_packet(AVFormatContext *s, int stream_index, 
-                           const uint8_t *buf, int size, int64_t pts)
+static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    AVCodecContext *codec = &s->streams[stream_index]->codec;
+    AVCodecContext *codec = &s->streams[pkt->stream_index]->codec;
     if (codec->codec_type == CODEC_TYPE_AUDIO)
-        return swf_write_audio(s, codec, buf, size);
+        return swf_write_audio(s, codec, pkt->data, pkt->size);
     else
-        return swf_write_video(s, codec, buf, size);
+        return swf_write_video(s, codec, pkt->data, pkt->size);
 }
 
 static int swf_write_trailer(AVFormatContext *s)
diff --git a/libavformat/utils.c b/libavformat/utils.c
index b60367c090..3232f0276f 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -569,10 +569,12 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
     int num, den, presentation_delayed;
 
     /* handle wrapping */
-    if(pkt->pts != AV_NOPTS_VALUE)
-        pkt->pts= lsb2full(pkt->pts, st->cur_dts, st->pts_wrap_bits);
-    if(pkt->dts != AV_NOPTS_VALUE)
-        pkt->dts= lsb2full(pkt->dts, st->cur_dts, st->pts_wrap_bits);
+    if(st->cur_dts != AV_NOPTS_VALUE){
+        if(pkt->pts != AV_NOPTS_VALUE)
+            pkt->pts= lsb2full(pkt->pts, st->cur_dts, st->pts_wrap_bits);
+        if(pkt->dts != AV_NOPTS_VALUE)
+            pkt->dts= lsb2full(pkt->dts, st->cur_dts, st->pts_wrap_bits);
+    }
     
     if (pkt->duration == 0) {
         compute_frame_duration(&num, &den, s, st, pc, pkt);
@@ -596,7 +598,13 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
         if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts)
             presentation_delayed = 1;
     }
+    
+    if(st->cur_dts == AV_NOPTS_VALUE){
+        if(presentation_delayed) st->cur_dts = -pkt->duration;
+        else                     st->cur_dts = 0;
+    }
 
+//    av_log(NULL, AV_LOG_DEBUG, "IN delayed:%d pts:%lld, dts:%lld cur_dts:%lld\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts);
     /* interpolate PTS and DTS if they are not present */
     if (presentation_delayed) {
         /* DTS = decompression time stamp */
@@ -637,6 +645,7 @@ static void compute_pkt_fields(AVFormatContext *s, AVStream *st,
         }
         st->cur_dts += pkt->duration;
     }
+//    av_log(NULL, AV_LOG_DEBUG, "OUTdelayed:%d pts:%lld, dts:%lld cur_dts:%lld\n", presentation_delayed, pkt->pts, pkt->dts, st->cur_dts);
     
     /* update flags */
     if (pc) {
@@ -1672,6 +1681,30 @@ int av_find_stream_info(AVFormatContext *ic)
     }
 
     av_estimate_timings(ic);
+#if 0
+    /* correct DTS for b frame streams with no timestamps */
+    for(i=0;i<ic->nb_streams;i++) {
+        st = ic->streams[i];
+        if (st->codec.codec_type == CODEC_TYPE_VIDEO) {
+            if(b-frames){
+                ppktl = &ic->packet_buffer;
+                while(ppkt1){
+                    if(ppkt1->stream_index != i)
+                        continue;
+                    if(ppkt1->pkt->dts < 0)
+                        break;
+                    if(ppkt1->pkt->pts != AV_NOPTS_VALUE)
+                        break;
+                    ppkt1->pkt->dts -= delta;
+                    ppkt1= ppkt1->next;
+                }
+                if(ppkt1)
+                    continue;
+                st->cur_dts -= delta;
+            }
+        }
+    }
+#endif
     return ret;
 }
 
@@ -1764,6 +1797,7 @@ AVStream *av_new_stream(AVFormatContext *s, int id)
     st->id = id;
     st->start_time = AV_NOPTS_VALUE;
     st->duration = AV_NOPTS_VALUE;
+    st->cur_dts = AV_NOPTS_VALUE;
 
     /* default pts settings is MPEG like */
     av_set_pts_info(st, 33, 1, 90000);
@@ -1836,27 +1870,68 @@ int av_write_header(AVFormatContext *s)
  * one audio or video frame.
  *
  * @param s media file handle
- * @param stream_index stream index
- * @param buf buffer containing the frame data
- * @param size size of buffer
+ * @param pkt the packet, which contains the stream_index, buf/buf_size, dts/pts, ...
  * @return < 0 if error, = 0 if OK, 1 if end of stream wanted.
  */
-int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf, 
-                   int size)
+int av_write_frame(AVFormatContext *s, AVPacket *pkt)
 {
     AVStream *st;
     int64_t pts_mask;
     int ret, frame_size;
+    int b_frames;
 
-    st = s->streams[stream_index];
-    pts_mask = (1LL << st->pts_wrap_bits) - 1;
+    if(pkt->stream_index<0)
+        return -1;
+    st = s->streams[pkt->stream_index];
 
-    /* HACK/FIXME we skip all zero size audio packets so a encoder can pass pts by outputing zero size packets */
-    if(st->codec.codec_type==CODEC_TYPE_AUDIO && size==0)
-        ret = 0;
-    else
-        ret = s->oformat->write_packet(s, stream_index, buf, size, 
-                                       st->pts.val & pts_mask);
+    b_frames = FFMAX(st->codec.has_b_frames, st->codec.max_b_frames);
+
+  //  av_log(s, AV_LOG_DEBUG, "av_write_frame: pts:%lld dts:%lld cur_dts:%lld b:%d size:%d\n", pkt->pts, pkt->dts, st->cur_dts, b_frames, pkt->size);
+    
+/*    if(pkt->pts == AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE)
+        return -1;*/
+            
+    if(pkt->pts != AV_NOPTS_VALUE)
+        pkt->pts = av_rescale(pkt->pts, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
+    if(pkt->dts != AV_NOPTS_VALUE)
+        pkt->dts = av_rescale(pkt->dts, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
+
+    /* duration field */
+    pkt->duration = av_rescale(pkt->duration, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num);
+
+    //XXX/FIXME this is a temporary hack until all encoders output pts
+    if((pkt->pts == 0 || pkt->pts == AV_NOPTS_VALUE) && pkt->dts == AV_NOPTS_VALUE && !b_frames){
+        pkt->dts=
+//        pkt->pts= st->cur_dts;
+        pkt->pts= st->pts.val;
+    }
+
+    //calculate dts from pts    
+    if(pkt->pts != AV_NOPTS_VALUE && pkt->dts == AV_NOPTS_VALUE){
+        if(b_frames){
+            if(st->last_IP_pts == AV_NOPTS_VALUE){
+                st->last_IP_pts= -av_rescale(1, 
+                    st->codec.frame_rate_base*(int64_t)st->time_base.den, 
+                    st->codec.frame_rate     *(int64_t)st->time_base.num);
+            }
+            if(st->last_IP_pts < pkt->pts){
+                pkt->dts= st->last_IP_pts;
+                st->last_IP_pts= pkt->pts;
+            }else
+                pkt->dts= pkt->pts;
+        }else
+            pkt->dts= pkt->pts;
+    }
+    
+//    av_log(s, AV_LOG_DEBUG, "av_write_frame: pts2:%lld dts2:%lld\n", pkt->pts, pkt->dts);
+    st->cur_dts= pkt->dts;
+    st->pts.val= pkt->dts;
+
+    pts_mask = (2LL << (st->pts_wrap_bits-1)) - 1;
+    pkt->pts &= pts_mask;
+    pkt->dts &= pts_mask;
+    
+    ret = s->oformat->write_packet(s, pkt);
     
     if (ret < 0)
         return ret;
@@ -1864,11 +1939,11 @@ int av_write_frame(AVFormatContext *s, int stream_index, const uint8_t *buf,
     /* update pts */
     switch (st->codec.codec_type) {
     case CODEC_TYPE_AUDIO:
-        frame_size = get_audio_frame_size(&st->codec, size);
+        frame_size = get_audio_frame_size(&st->codec, pkt->size);
 
         /* HACK/FIXME, we skip the initial 0-size packets as they are most likely equal to the encoder delay,
            but it would be better if we had the real timestamps from the encoder */
-        if (frame_size >= 0 && (size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
+        if (frame_size >= 0 && (pkt->size || st->pts.num!=st->pts.den>>1 || st->pts.val)) {
             av_frac_add(&st->pts, (int64_t)st->time_base.den * frame_size);
         }
         break;
diff --git a/libavformat/wav.c b/libavformat/wav.c
index 495ae0f969..1d18098339 100644
--- a/libavformat/wav.c
+++ b/libavformat/wav.c
@@ -203,11 +203,10 @@ static int wav_write_header(AVFormatContext *s)
     return 0;
 }
 
-static int wav_write_packet(AVFormatContext *s, int stream_index_ptr,
-                            const uint8_t *buf, int size, int64_t pts)
+static int wav_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
     ByteIOContext *pb = &s->pb;
-    put_buffer(pb, buf, size);
+    put_buffer(pb, pkt->data, pkt->size);
     return 0;
 }
 
diff --git a/libavformat/yuv4mpeg.c b/libavformat/yuv4mpeg.c
index 1520b34635..1a18ad03ea 100644
--- a/libavformat/yuv4mpeg.c
+++ b/libavformat/yuv4mpeg.c
@@ -58,10 +58,9 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
     return n;
 }
 
-static int yuv4_write_packet(AVFormatContext *s, int stream_index,
-                             const uint8_t *buf, int size, int64_t pts)
+static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
 {
-    AVStream *st = s->streams[stream_index];
+    AVStream *st = s->streams[pkt->stream_index];
     ByteIOContext *pb = &s->pb;
     AVPicture *picture;
     int* first_pkt = s->priv_data;
@@ -71,7 +70,7 @@ static int yuv4_write_packet(AVFormatContext *s, int stream_index,
     char buf1[20];
     uint8_t *ptr, *ptr1, *ptr2;
 
-    picture = (AVPicture *)buf;
+    picture = (AVPicture *)pkt->data;
 
     /* for the first packet we have to output the header as well */
     if (*first_pkt) {
diff --git a/output_example.c b/output_example.c
index 3b557b0f5b..6f3dcb7379 100644
--- a/output_example.c
+++ b/output_example.c
@@ -142,16 +142,22 @@ void write_audio_frame(AVFormatContext *oc, AVStream *st)
 {
     int out_size;
     AVCodecContext *c;
-
-
+    AVPacket pkt;
+    av_init_packet(&pkt);
+    
     c = &st->codec;
 
     get_audio_frame(samples, audio_input_frame_size, c->channels);
 
-    out_size = avcodec_encode_audio(c, audio_outbuf, audio_outbuf_size, samples);
+    pkt.size= avcodec_encode_audio(c, audio_outbuf, audio_outbuf_size, samples);
+
+    pkt.pts= c->coded_frame->pts;
+    pkt.flags |= PKT_FLAG_KEY;
+    pkt.stream_index= st->index;
+    pkt.data= audio_outbuf;
 
     /* write the compressed frame in the media file */
-    if (av_write_frame(oc, st->index, audio_outbuf, out_size) != 0) {
+    if (av_write_frame(oc, &pkt) != 0) {
         fprintf(stderr, "Error while writing audio frame\n");
         exit(1);
     }
@@ -336,16 +342,32 @@ void write_video_frame(AVFormatContext *oc, AVStream *st)
     if (oc->oformat->flags & AVFMT_RAWPICTURE) {
         /* raw video case. The API will change slightly in the near
            futur for that */
-        ret = av_write_frame(oc, st->index, 
-                       (uint8_t *)picture_ptr, sizeof(AVPicture));
+        AVPacket pkt;
+        av_init_packet(&pkt);
+        
+        pkt.flags |= PKT_FLAG_KEY;
+        pkt.stream_index= st->index;
+        pkt.data= (uint8_t *)picture_ptr;
+        pkt.size= sizeof(AVPicture);
+        
+        ret = av_write_frame(oc, &pkt);
     } else {
         /* encode the image */
         out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, picture_ptr);
         /* if zero size, it means the image was buffered */
         if (out_size != 0) {
+            AVPacket pkt;
+            av_init_packet(&pkt);
+            
+            pkt.pts= c->coded_frame->pts;
+            if(c->coded_frame->key_frame)
+                pkt.flags |= PKT_FLAG_KEY;
+            pkt.stream_index= st->index;
+            pkt.data= video_outbuf;
+            pkt.size= out_size;
+            
             /* write the compressed frame in the media file */
-            /* XXX: in case of B frames, the pts is not yet valid */
-            ret = av_write_frame(oc, st->index, video_outbuf, out_size);
+            ret = av_write_frame(oc, &pkt);
         } else {
             ret = 0;
         }
diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
index f1a000c155..a3fe4f4549 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -51,20 +51,20 @@ stddev:  8.05 PSNR:30.00 bytes:7602176
 5986168 ./data/a-huffyuv.avi
 799d3db687f6cdd7a837ec156efc171f *./data/out.yuv
 stddev:  0.00 PSNR:99.99 bytes:7602176
-a06eb02738bc67c61392fe2fced2afa9 *./data/a-mpeg4-rc.avi
- 816398 ./data/a-mpeg4-rc.avi
+a86d267dceb37beca514484ad5951675 *./data/a-mpeg4-rc.avi
+816350 ./data/a-mpeg4-rc.avi
 11efbbf01c8473ac5eabd775f1c0bec5 *./data/out.yuv
 stddev: 11.51 PSNR:26.89 bytes:7299072
 451bd18acf3c169301c215a63a3b216d *./data/a-mpeg4-adv.avi
  592570 ./data/a-mpeg4-adv.avi
 9f4fbff593dd0bd7ad437ceee4afc11f *./data/out.yuv
 stddev: 10.31 PSNR:27.85 bytes:7602176
-3424145af47f83c77bd42f4707c1a722 *./data/a-mpeg4-thread.avi
- 752408 ./data/a-mpeg4-thread.avi
+b99438023ff9dda75494b4095c42affa *./data/a-mpeg4-thread.avi
+752360 ./data/a-mpeg4-thread.avi
 51b7bfb3cbf1580eefc61e610451e67e *./data/out.yuv
 stddev: 13.17 PSNR:25.72 bytes:7299072
-36688568f48f40163c338c6f3435c132 *./data/a-mpeg4-Q.avi
-875964 ./data/a-mpeg4-Q.avi
+4f1ca5927928b8433bfcb5f231239462 *./data/a-mpeg4-Q.avi
+875916 ./data/a-mpeg4-Q.avi
 dca5adb5fca49a806e71266f1a04c3a5 *./data/out.yuv
 stddev:  8.15 PSNR:29.89 bytes:7299072
 771f65ff24c0d32b37f2663892b2f433 *./data/a-error-mpeg4-adv.avi
diff --git a/tests/libav.regression.ref b/tests/libav.regression.ref
index 3fd792a870..aebbbb706e 100644
--- a/tests/libav.regression.ref
+++ b/tests/libav.regression.ref
@@ -2,9 +2,9 @@ ffmpeg regression test
 c23bbe3016afcb726a494858b7bb17e3 *./data/b-libav.avi
  337732 ./data/b-libav.avi
 ./data/b-libav.avi CRC=658838d9
-b166e89a9ec8c707573329d883c1b6f9 *./data/b-libav.asf
+a09d8460b207c4a67a26842c70fbb060 *./data/b-libav.asf
  339767 ./data/b-libav.asf
-./data/b-libav.asf CRC=525fdb22
+./data/b-libav.asf CRC=4b9f25a1
 be8eb1b5705c8105e4727258e448cb24 *./data/b-libav.rm
  356950 ./data/b-libav.rm
 e826aa1637ff15144ab484c1efca7fe7 *./data/b-libav.mpg
diff --git a/tests/regression.sh b/tests/regression.sh
index 8f5d2463fe..981c2afc86 100755
--- a/tests/regression.sh
+++ b/tests/regression.sh
@@ -477,7 +477,7 @@ do_ffmpeg_crc $file -i $file
 # asf
 file=${outfile}libav.asf
 do_ffmpeg $file -t 1 -y -qscale 10 -f pgmyuv -i $raw_src -f s16le -i $pcm_src -acodec mp2 $file
-do_ffmpeg_crc $file -i $file
+do_ffmpeg_crc $file -i $file -r 25
 
 # rm
 file=${outfile}libav.rm
diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref
index b693866c5a..e55dc051c7 100644
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -51,20 +51,20 @@ stddev:  5.44 PSNR:33.40 bytes:7602176
 4987020 ./data/a-huffyuv.avi
 dde5895817ad9d219f79a52d0bdfb001 *./data/out.yuv
 stddev:  0.00 PSNR:99.99 bytes:7602176
-ca8f249763ca162cbee43cb32b7b165b *./data/a-mpeg4-rc.avi
- 223932 ./data/a-mpeg4-rc.avi
+55b7400e3abf9b24d4a0f5d2963ffa29 *./data/a-mpeg4-rc.avi
+223884 ./data/a-mpeg4-rc.avi
 5ad73d80df55d60384a43b8260174912 *./data/out.yuv
 stddev:  5.28 PSNR:33.66 bytes:7299072
 8249cc83e341cd18e45adf589e1d254e *./data/a-mpeg4-adv.avi
  180988 ./data/a-mpeg4-adv.avi
 a46b891f446aef2c025dc2847dc86ed6 *./data/out.yuv
 stddev:  4.95 PSNR:34.22 bytes:7602176
-f2f6e3841d4a5def6d70297b09a6df6c *./data/a-mpeg4-thread.avi
- 249670 ./data/a-mpeg4-thread.avi
+43411d9f33c8112a25d805f6edf88c17 *./data/a-mpeg4-thread.avi
+249622 ./data/a-mpeg4-thread.avi
 e01d0d5a98d2624b107e13c6f50c533c *./data/out.yuv
 stddev:  5.09 PSNR:33.97 bytes:7299072
-96333905f57a579396c5121d6651fc7e *./data/a-mpeg4-Q.avi
-159744 ./data/a-mpeg4-Q.avi
+bfd6fcccc5aa8c3fa5222a33a0bb3b63 *./data/a-mpeg4-Q.avi
+159696 ./data/a-mpeg4-Q.avi
 f44b074a83b177950055ddd6da7e518d *./data/out.yuv
 stddev:  5.02 PSNR:34.09 bytes:7299072
 901ebdbc7438744f0832a9a0cc7678e3 *./data/a-error-mpeg4-adv.avi