diff --git a/doc/APIchanges b/doc/APIchanges
index 5707d1397aa8882ef2c7ef1cbad2fdf28cb38087..fd4bbb1307ef60dff5eae1823a2971d71bf776e7 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@ libavutil:     2012-10-22
 
 API changes, most recent first:
 
+2012-12-15 - xxxxxxx - lavc 54.80.100 - avcodec.h
+  Add pkt_size field to AVFrame.
+
 2012-11-25 - xxxxxxx - lavu 52.9.100 - opt.h
   Add the following convenience functions to opt.h:
    av_opt_get_image_size
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index e432040b1d27fe00ca574fe81ea40d451ba4d3ad..5865aa3a7e34b66e355cfe6d4bd4a20d7f94f0c0 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -1467,6 +1467,16 @@ typedef struct AVFrame {
      * - decoding: Read by user.
      */
     int64_t channels;
+
+    /**
+     * size of the corresponding packet containing the compressed
+     * frame. It must be accessed using av_frame_get_pkt_size() and
+     * av_frame_set_pkt_size().
+     * It is set to a negative value if unknown.
+     * - encoding: unused
+     * - decoding: set by libavcodec, read by user.
+     */
+    int pkt_size;
 } AVFrame;
 
 /**
@@ -1490,6 +1500,8 @@ AVDictionary *av_frame_get_metadata       (const AVFrame *frame);
 void          av_frame_set_metadata       (AVFrame *frame, AVDictionary *val);
 int     av_frame_get_decode_error_flags   (const AVFrame *frame);
 void    av_frame_set_decode_error_flags   (AVFrame *frame, int     val);
+int     av_frame_get_pkt_size(const AVFrame *frame);
+void    av_frame_set_pkt_size(AVFrame *frame, int val);
 
 struct AVCodecInternal;
 
diff --git a/libavcodec/options.c b/libavcodec/options.c
index 0da0db480687ec7d7980c64312e0c90051a87391..a922365a17b09a66b2ecd8bf03abbc556e051f83 100644
--- a/libavcodec/options.c
+++ b/libavcodec/options.c
@@ -248,6 +248,7 @@ const AVClass *avcodec_get_class(void)
 static const AVOption frame_options[]={
 {"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
 {"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
+{"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
 {"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
 {"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
 {"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index dcf81e6351cf0a5e7be277582d0ded16b24dcbdd..abd930d746cd4d9f7101740dd0a37193cce2884b 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -512,10 +512,12 @@ void ff_init_buffer_info(AVCodecContext *s, AVFrame *frame)
         frame->pkt_pts = s->pkt->pts;
         frame->pkt_pos = s->pkt->pos;
         frame->pkt_duration = s->pkt->duration;
+        frame->pkt_size = s->pkt->size;
     } else {
         frame->pkt_pts = AV_NOPTS_VALUE;
         frame->pkt_pos = -1;
         frame->pkt_duration = 0;
+        frame->pkt_size = -1;
     }
     frame->reordered_opaque = s->reordered_opaque;
 
@@ -677,6 +679,7 @@ void avcodec_get_frame_defaults(AVFrame *frame)
     frame->best_effort_timestamp = AV_NOPTS_VALUE;
     frame->pkt_duration        = 0;
     frame->pkt_pos             = -1;
+    frame->pkt_size            = -1;
     frame->key_frame           = 1;
     frame->sample_aspect_ratio = (AVRational) {0, 1 };
     frame->format              = -1; /* unknown */
@@ -723,6 +726,7 @@ MAKE_ACCESSORS(AVFrame, frame, int,     channels)
 MAKE_ACCESSORS(AVFrame, frame, int,     sample_rate)
 MAKE_ACCESSORS(AVFrame, frame, AVDictionary *, metadata)
 MAKE_ACCESSORS(AVFrame, frame, int,     decode_error_flags)
+MAKE_ACCESSORS(AVFrame, frame, int,     pkt_size)
 
 MAKE_ACCESSORS(AVCodecContext, codec, AVRational, pkt_timebase)
 MAKE_ACCESSORS(AVCodecContext, codec, const AVCodecDescriptor *, codec_descriptor)
diff --git a/libavcodec/version.h b/libavcodec/version.h
index bea75d96b32e91276a325b5ce3801ad7753612cc..f980fed78fc33648b63092185f8725543bd87cb0 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -29,8 +29,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVCODEC_VERSION_MAJOR 54
-#define LIBAVCODEC_VERSION_MINOR 79
-#define LIBAVCODEC_VERSION_MICRO 102
+#define LIBAVCODEC_VERSION_MINOR 80
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \