On date Sunday 2016-03-06 20:49:24 -0600, Rodger Combs encoded:
> ---
> doc/muxers.texi | 5 +++++
> libavformat/segment.c | 8 +++++++-
> 2 files changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/doc/muxers.texi b/doc/muxers.texi
> index f2ad7fe..700ec88 100644
> --- a/doc/muxers.texi
> +++ b/doc/muxers.texi
> @@ -1224,6 +1224,11 @@ 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
Can you describe an use case for this (and possibly add a short
description in the log)?
>
> @subsection Examples
> diff --git a/libavformat/segment.c b/libavformat/segment.c
> index 6ad991f..df1514f 100644
> --- a/libavformat/segment.c
> +++ b/libavformat/segment.c
> @@ -116,6 +116,7 @@ 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];
> @@ -774,6 +775,7 @@ 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;
> @@ -805,7 +807,7 @@ 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,
> @@ -825,6 +827,9 @@ 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;
what's the point of this goto?
[...]
--
FFmpeg = Funny and Frenzy Muttering Picky Emblematic Generator
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