OK,  I got it.

Thanks a lot.


在 2022/6/27 上午10:23, Steven Liu 写道:
> Li Kai <wolfleekay@gmail.com> 于2022年6月25日周六 22:15写道：
>> OK, I add the option description in doc/demuxers.texi.
>>
>> About invalid EXT-X-START value, it's not played on Safari.
>> So I make it error to handle.
>>
>> You opinion, it's better way. The latest patch fix it.
>>
>>
>>
> @@ -741,6 +744,7 @@ static int parse_playlist(HLSContext *c, const char *url,
>       struct segment **prev_segments = NULL;
>       int prev_n_segments = 0;
>       int64_t prev_start_seq_no = -1;
> +    const char *p;
>
>       if (is_http && !in && c->http_persistent && c->playlist_pb) {
>           in = c->playlist_pb;
> @@ -889,6 +893,20 @@ static int parse_playlist(HLSContext *c, const char *url,
>                   cur_init_section->key = NULL;
>               }
>
> +        } else if (av_strstart(line, "#EXT-X-START:", &ptr)) {
> Can the "const char *p;" move to here? And maybe make a clarify name
> will better i think, e.g. const char *time_offset_value?
>
> +            ret = ensure_playlist(c, &pls, url);
> +            if (ret < 0) {
> +                goto fail;
> +            }
> +            if (av_strstart(ptr, "TIME-OFFSET=", &p)) {
> +                float offset = strtof(p, NULL);
> +                pls->start_time_offset = offset * AV_TIME_BASE;
> +                pls->time_offset_flag = 1;
> +            } else {
> +                av_log(c->ctx, AV_LOG_WARNING, "#EXT-X-START value is"
> +                                                "invalid, it will be ignored");
> +                continue;
> +            }
>           } else if (av_strstart(line, "#EXT-X-ENDLIST", &ptr)) {
>               if (pls)
>                   pls->finished = 1;
>
>
>
> Thanks
> Steven