@@ -717,6 +717,8 @@ Change the syncpoint usage in nut:

 @item @var{timestamped} extend the syncpoint with a wallclock field.

 @end table

 The @var{none} and @var{timestamped} flags are experimental.

+@item -write_index @var{bool}

+Write index at the end, the default is to write an index.

 @end table

 @example

@@ -106,6 +106,7 @@ typedef struct NUTContext {

     AVRational *time_base;

     struct AVTreeNode *syncpoints;

     int sp_count;

+    int write_index;

     int64_t max_pts;

     AVRational *max_pts_tb;

 #define NUT_BROADCAST 1 // use extended syncpoints

@@ -1019,6 +1019,7 @@ static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)

         }

         put_packet(nut, bc, dyn_bc, 1, SYNCPOINT_STARTCODE);

+        if (nut->write_index) {

         if ((ret = ff_nut_add_sp(nut, nut->last_syncpoint_pos, 0 /*unused*/, pkt->dts)) < 0)

             return ret;

@@ -1032,6 +1033,7 @@ static int nut_write_packet(AVFormatContext *s, AVPacket *pkt)

                 for (j=nut->sp_count == 1 ? 0 : nut->sp_count; j<2*nut->sp_count; j++)

                     nus->keyframe_pts[j] = AV_NOPTS_VALUE;

         }

+        }

     }

     av_assert0(nus->last_pts != AV_NOPTS_VALUE);

@@ -1157,7 +1159,7 @@ static int nut_write_trailer(AVFormatContext *s)

         write_headers(s, bc);

     ret = avio_open_dyn_buf(&dyn_bc);

-    if (ret >= 0 && nut->sp_count) {

+    if (ret >= 0 && nut->sp_count && nut->write_index) {

         write_index(nut, dyn_bc);

         put_packet(nut, bc, dyn_bc, 1, INDEX_STARTCODE);

     }

@@ -1180,6 +1182,7 @@ static const AVOption options[] = {

     { "default",     "",                                                0,             AV_OPT_TYPE_CONST, {.i64 = 0},             INT_MIN, INT_MAX, E, "syncpoints" },

     { "none",        "Disable syncpoints, low overhead and unseekable", 0,             AV_OPT_TYPE_CONST, {.i64 = NUT_PIPE},      INT_MIN, INT_MAX, E, "syncpoints" },

     { "timestamped", "Extend syncpoints with a wallclock timestamp",    0,             AV_OPT_TYPE_CONST, {.i64 = NUT_BROADCAST}, INT_MIN, INT_MAX, E, "syncpoints" },

+    { "write_index", "Write index",                               OFFSET(write_index), AV_OPT_TYPE_INT,   {.i64 = 1},                   0,       1, E, },

     { NULL },

 };