[FFmpeg-devel] [PATCH v2 1/2] avformat/hlsenc: check discont_program_date_time before use it in parse_playlist

["zhilizhao(赵志立)"]

> On May 8, 2022, at 9:17 AM, Steven Liu <lq at chinaffmpeg.org> wrote:
> 
> In parse_playlist, the discont_program_date_time should be used after
> EXT-X-PROGRAM-DATE-TIME tag parsed.
> 
> Signed-off-by: Steven Liu <lq at chinaffmpeg.org>
> ---
> libavformat/hlsenc.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
> index d2b8215dff..b9f79e30d8 100644
> --- a/libavformat/hlsenc.c
> +++ b/libavformat/hlsenc.c
> @@ -1288,8 +1288,10 @@ static int parse_playlist(AVFormatContext *s, const char *url, VariantStream *vs
>                 new_start_pos = avio_tell(vs->avf->pb);
>                 vs->size = new_start_pos - vs->start_pos;
>                 ret = hls_append_segment(s, hls, vs, vs->duration, vs->start_pos, vs->size);
> -                vs->last_segment->discont_program_date_time = discont_program_date_time;
> -                discont_program_date_time += vs->duration;
> +                if (discont_program_date_time) {
> +                    vs->last_segment->discont_program_date_time = discont_program_date_time;
> +                    discont_program_date_time += vs->duration;
> +                }

Looks good to me, although it doesn’t work if EXT-X-PROGRAM-DATE-TIME is 1970-01-01 :)

>                 if (ret < 0)
>                     goto fail;
>                 vs->start_pos = new_start_pos;
> -- 
> 2.34.1
> 
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