diff --git a/doc/APIchanges b/doc/APIchanges
index 004a4b40a1..7c5ab9b870 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -899,6 +899,9 @@ lavd 54.4.100 / 54.0.0, lavfi 3.5.0
   avresample_read() are now uint8_t** instead of void**.
   Libavresample is now stable.
 
+2012-09-26 - 3ba0dab7 / 1384df64 - lavf 54.29.101 / 56.06.3 - avformat.h
+  Add AVFormatContext.avoid_negative_ts.
+
 2012-09-24 - 46a3595 / a42aada - lavc 54.59.100 / 54.28.0 - avcodec.h
   Add avcodec_free_frame(). This function must now
   be used for freeing an AVFrame.
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index f21a1d610e..3733549e72 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1475,6 +1475,18 @@ typedef struct AVFormatContext {
      */
     int max_ts_probe;
 
+    /**
+     * Avoid negative timestamps during muxing.
+     * Any value of the AVFMT_AVOID_NEG_TS_* constants.
+     * Note, this only works when using av_interleaved_write_frame. (interleave_packet_per_dts is in use)
+     * - muxing: Set by user
+     * - demuxing: unused
+     */
+    int avoid_negative_ts;
+#define AVFMT_AVOID_NEG_TS_AUTO             -1 ///< Enabled when required by target format
+#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE 1 ///< Shift timestamps so they are non negative
+#define AVFMT_AVOID_NEG_TS_MAKE_ZERO         2 ///< Shift timestamps so that they start at 0
+
 
     /**
      * Transport stream id.
@@ -1514,17 +1526,6 @@ typedef struct AVFormatContext {
      */
     int use_wallclock_as_timestamps;
 
-    /**
-     * Avoid negative timestamps during muxing.
-     *  0 -> allow negative timestamps
-     *  1 -> avoid negative timestamps
-     * -1 -> choose automatically (default)
-     * Note, this only works when interleave_packet_per_dts is in use.
-     * - encoding: Set by user via AVOptions (NO direct access)
-     * - decoding: unused
-     */
-    int avoid_negative_ts;
-
     /**
      * avio flags, used to force AVIO_FLAG_DIRECT.
      * - encoding: unused
diff --git a/libavformat/mux.c b/libavformat/mux.c
index 6c77f3b526..8c3360ad92 100644
--- a/libavformat/mux.c
+++ b/libavformat/mux.c
@@ -419,10 +419,11 @@ int avformat_write_header(AVFormatContext *s, AVDictionary **options)
         return ret;
 
     if (s->avoid_negative_ts < 0) {
+        av_assert2(s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_AUTO);
         if (s->oformat->flags & (AVFMT_TS_NEGATIVE | AVFMT_NOTIMESTAMPS)) {
             s->avoid_negative_ts = 0;
         } else
-            s->avoid_negative_ts = 1;
+            s->avoid_negative_ts = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE;
     }
 
     return 0;
@@ -556,7 +557,8 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
         AVStream *st = s->streams[pkt->stream_index];
         int64_t offset = st->mux_ts_offset;
 
-        if ((pkt->dts < 0 || s->avoid_negative_ts == 2) && pkt->dts != AV_NOPTS_VALUE && !s->offset) {
+        if (!s->offset && pkt->dts != AV_NOPTS_VALUE &&
+            (pkt->dts < 0 || s->avoid_negative_ts == AVFMT_AVOID_NEG_TS_MAKE_ZERO)) {
             s->offset = -pkt->dts;
             s->offset_timebase = st->time_base;
         }
diff --git a/libavformat/options_table.h b/libavformat/options_table.h
index 5ac3fba052..40f1e0ae43 100644
--- a/libavformat/options_table.h
+++ b/libavformat/options_table.h
@@ -78,11 +78,6 @@ static const AVOption avformat_options[] = {
 {"compliant",  "consider all spec non compliancies as errors", 0, AV_OPT_TYPE_CONST, {.i64 = AV_EF_COMPLIANT }, INT_MIN, INT_MAX, D, "err_detect"},
 {"aggressive", "consider things that a sane encoder shouldn't do as an error", 0, AV_OPT_TYPE_CONST, {.i64 = AV_EF_AGGRESSIVE }, INT_MIN, INT_MAX, D, "err_detect"},
 {"use_wallclock_as_timestamps", "use wallclock as timestamps", OFFSET(use_wallclock_as_timestamps), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX-1, D},
-{"avoid_negative_ts", "shift timestamps so they start at 0", OFFSET(avoid_negative_ts), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, E, "avoid_negative_ts"},
-{"auto",                "enabled when required by target format",    0, AV_OPT_TYPE_CONST, {.i64 = -1 }, INT_MIN, INT_MAX, E, "avoid_negative_ts"},
-{"disabled",            "do not change timestamps",                  0, AV_OPT_TYPE_CONST, {.i64 =  0 }, INT_MIN, INT_MAX, E, "avoid_negative_ts"},
-{"make_zero",           "shift timestamps so they start at 0",       0, AV_OPT_TYPE_CONST, {.i64 =  2 }, INT_MIN, INT_MAX, E, "avoid_negative_ts"},
-{"make_non_negative",   "shift timestamps so they are non negative", 0, AV_OPT_TYPE_CONST, {.i64 =  1 }, INT_MIN, INT_MAX, E, "avoid_negative_ts"},
 {"skip_initial_bytes", "set number of bytes to skip before reading header and frames", OFFSET(skip_initial_bytes), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX-1, D},
 {"correct_ts_overflow", "correct single timestamp overflows", OFFSET(correct_ts_overflow), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, D},
 {"flush_packets", "enable flushing of the I/O context after each packet", OFFSET(flush_packets), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, E},
@@ -96,6 +91,11 @@ static const AVOption avformat_options[] = {
 {"unofficial", "allow unofficial extensions", 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_UNOFFICIAL }, INT_MIN, INT_MAX, D|E, "strict"},
 {"experimental", "allow non-standardized experimental variants", 0, AV_OPT_TYPE_CONST, {.i64 = FF_COMPLIANCE_EXPERIMENTAL }, INT_MIN, INT_MAX, D|E, "strict"},
 {"max_ts_probe", "maximum number of packets to read while waiting for the first timestamp", OFFSET(max_ts_probe), AV_OPT_TYPE_INT, { .i64 = 50 }, 0, INT_MAX, D },
+{"avoid_negative_ts", "shift timestamps so they start at 0", OFFSET(avoid_negative_ts), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 2, E, "avoid_negative_ts"},
+{"auto",              "enabled when required by target format",    0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_AVOID_NEG_TS_AUTO },              INT_MIN, INT_MAX, E, "avoid_negative_ts"},
+{"disabled",          "do not change timestamps",                  0, AV_OPT_TYPE_CONST, {.i64 = 0 },                                    INT_MIN, INT_MAX, E, "avoid_negative_ts"},
+{"make_non_negative", "shift timestamps so they are non negative", 0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE }, INT_MIN, INT_MAX, E, "avoid_negative_ts"},
+{"make_zero",         "shift timestamps so they start at 0",       0, AV_OPT_TYPE_CONST, {.i64 = AVFMT_AVOID_NEG_TS_MAKE_ZERO },         INT_MIN, INT_MAX, E, "avoid_negative_ts"},
 {"dump_separator", "set information dump field separator", OFFSET(dump_separator), AV_OPT_TYPE_STRING, {.str = ", "}, CHAR_MIN, CHAR_MAX, D|E},
 {"codec_whitelist", "List of decoders that are allowed to be used", OFFSET(codec_whitelist), AV_OPT_TYPE_STRING, { .str = NULL },  CHAR_MIN, CHAR_MAX, D },
 {"format_whitelist", "List of demuxers that are allowed to be used", OFFSET(format_whitelist), AV_OPT_TYPE_STRING, { .str = NULL },  CHAR_MIN, CHAR_MAX, D },
diff --git a/libavformat/version.h b/libavformat/version.h
index 008f350aed..1368f2327f 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -31,7 +31,7 @@
 
 #define LIBAVFORMAT_VERSION_MAJOR 56
 #define LIBAVFORMAT_VERSION_MINOR  12
-#define LIBAVFORMAT_VERSION_MICRO 101
+#define LIBAVFORMAT_VERSION_MICRO 102
 
 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
                                                LIBAVFORMAT_VERSION_MINOR, \