@@ -1238,6 +1238,11 @@ muxers/codecs. It is set to @code{0} by default.

 @item initial_offset @var{offset}

 Specify timestamp offset to apply to the output packet timestamps. The

 argument must be a time duration specification, and defaults to 0.

+

+@item write_empty_segments @var{1|0}

+If enabled, write an empty segment if there are no packets during the period a

+segment would usually span. Otherwise, the segment will be filled with the next

+packet written. Defaults to @code{0}.

 @end table

 @subsection Examples

@@ -118,6 +118,7 @@ typedef struct SegmentContext {

     char *reference_stream_specifier; ///< reference stream specifier

     int   reference_stream_index;

     int   break_non_keyframes;

+    int   write_empty;

     int use_rename;

     char temp_list_filename[1024];

@@ -810,6 +811,7 @@ static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)

     if (!seg->avf)

         return AVERROR(EINVAL);

+calc_times:

     if (seg->times) {

         end_pts = seg->segment_count < seg->nb_times ?

             seg->times[seg->segment_count] : INT64_MAX;

@@ -841,7 +843,7 @@ static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)

     if (pkt->stream_index == seg->reference_stream_index &&

         (pkt->flags & AV_PKT_FLAG_KEY || seg->break_non_keyframes) &&

-        seg->segment_frame_count > 0 &&

+        (seg->segment_frame_count > 0 || seg->write_empty) &&

         (seg->cut_pending || seg->frame_count >= start_frame ||

          (pkt->pts != AV_NOPTS_VALUE &&

           av_compare_ts(pkt->pts, st->time_base,

@@ -861,6 +863,9 @@ static int seg_write_packet(AVFormatContext *s, AVPacket *pkt)

         seg->cur_entry.start_time = (double)pkt->pts * av_q2d(st->time_base);

         seg->cur_entry.start_pts = av_rescale_q(pkt->pts, st->time_base, AV_TIME_BASE_Q);

         seg->cur_entry.end_time = seg->cur_entry.start_time;

+

+        if (seg->times || (!seg->frames && !seg->use_clocktime) && seg->write_empty)

+            goto calc_times;

     }

     if (pkt->stream_index == seg->reference_stream_index) {

@@ -1010,6 +1015,7 @@ static const AVOption options[] = {

     { "write_header_trailer", "write a header to the first segment and a trailer to the last one", OFFSET(write_header_trailer), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, E },

     { "reset_timestamps", "reset timestamps at the begin of each segment", OFFSET(reset_timestamps), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },

     { "initial_offset", "set initial timestamp offset", OFFSET(initial_offset), AV_OPT_TYPE_DURATION, {.i64 = 0}, -INT64_MAX, INT64_MAX, E },

+    { "write_empty_segments", "allow writing empty 'filler' segments", OFFSET(write_empty), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E },

     { NULL },

 };