[FFmpeg-devel] [PATCH] dashenc: Add a segment_start_number option

[Benoit Fouet]

Hi,

----- Mail original -----
> From b38a1396e2335e2d0ef2619b5a3890f91c31c8a8 Mon Sep 17 00:00:00
> 2001
> From: Rodger Combs <rodger.combs at gmail.com>
> Date: Thu, 20 Nov 2014 01:47:05 -0600
> Subject: [PATCH] dashenc: Add a segment_start_number option
> 
> This defaults to 0 instead of 1 for consistency with the segment
> encoder
> ---
>  libavformat/dashenc.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
> index dac217e..5958270 100644
> --- a/libavformat/dashenc.c
> +++ b/libavformat/dashenc.c
> @@ -80,6 +80,7 @@ typedef struct DASHContext {
>      int total_duration;
>      char availability_start_time[100];
>      char dirname[1024];
> +    int segment_start_number;
>  } DASHContext;
>  
>  static int dash_write(void *opaque, uint8_t *buf, int buf_size)
> @@ -182,7 +183,7 @@ static void dash_free(AVFormatContext *s)
>  
>  static void output_segment_list(OutputStream *os, AVIOContext *out,
>  DASHContext *c)
>  {
> -    int i, start_index = 0, start_number = 1;
> +    int i, start_index = 0, start_number = c->segment_start_number;
>      if (c->window_size) {
>          start_index  = FFMAX(os->nb_segments   - c->window_size, 0);
>          start_number = FFMAX(os->segment_index - c->window_size, 1);
> @@ -512,7 +513,7 @@ static int dash_write_header(AVFormatContext *s)
>  
>          set_codec_str(s, os->ctx->streams[0]->codec, os->codec_str,
>          sizeof(os->codec_str));
>          os->first_dts = AV_NOPTS_VALUE;
> -        os->segment_index = 1;
> +        os->segment_index = c->segment_start_number;
>      }
>  
>      if (!c->has_video && c->min_seg_duration <= 0) {
> @@ -754,6 +755,7 @@ static const AVOption options[] = {
>      { "use_template", "Use SegmentTemplate instead of SegmentList",
>      OFFSET(use_template), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
>      { "use_timeline", "Use SegmentTimeline in SegmentTemplate",
>      OFFSET(use_timeline), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
>      { "single_file", "Store all segments in one file, accessed using
>      byte ranges", OFFSET(single_file), AV_OPT_TYPE_INT, { .i64 = 0
>      }, 0, 1, E },
> +    { "segment_start_number", "first segment number to write",
> OFFSET(segment_start_number), AV_OPT_TYPE_INT, { .i64 = 0 }, 0,
> INT_MAX, E },
> 

Default should be 1, in order not to change the current behavior.

-- 
Ben