[FFmpeg-devel] [PATCH 05/11] avformat/dashenc: setting @availabilityStartTime when the first frame is ready

[Jeyapal, Karthick]

On 3/23/18 10:56 AM, vdixit at akamai.com wrote:
> From: Vishwanath Dixit <vdixit at akamai.com>
>
> @availabilityStartTime specifies the anchor for the computation of the earliest
> availability time (in UTC) for any Segment in the Media Presentation.
Please be little more verbose for a clearer explanation.
> ---
>  libavformat/dashenc.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
> index 7b854b5..b62cb3e 100644
> --- a/libavformat/dashenc.c
> +++ b/libavformat/dashenc.c
> @@ -740,9 +740,6 @@ static int write_manifest(AVFormatContext *s, int final)
>              update_period = 500;
>          avio_printf(out, "\tminimumUpdatePeriod=\"PT%"PRId64"S\"\n", update_period);
>          avio_printf(out, "\tsuggestedPresentationDelay=\"PT%"PRId64"S\"\n", c->last_duration / AV_TIME_BASE);
> -        if (!c->availability_start_time[0] && s->nb_streams > 0 && c->streams[0].nb_segments > 0) {
> -            format_date_now(c->availability_start_time, sizeof(c->availability_start_time));
> -        }
>          if (c->availability_start_time[0])
>              avio_printf(out, "\tavailabilityStartTime=\"%s\"\n", c->availability_start_time);
>          format_date_now(now_str, sizeof(now_str));
> @@ -1282,6 +1279,10 @@ static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
>      if (os->first_pts == AV_NOPTS_VALUE)
>          os->first_pts = pkt->pts;
>  
> +    if (!c->availability_start_time[0])
> +        format_date_now(c->availability_start_time,
> +                        sizeof(c->availability_start_time));
> +
>      if (c->use_template && !c->use_timeline) {
>          elapsed_duration = pkt->pts - os->first_pts;
>          seg_end_duration = (int64_t) os->segment_index * c->seg_duration;