[FFmpeg-devel] [PATCH] fftools/ffmpeg: fix negative timestamps at the beginning of the encoding

[Marton Balint]

On Tue, 4 Jul 2023, Marton Balint wrote:

> Also fix a couple of possible overflows while at it.
>
> Fixes the negative initial timestamps in ticket #10358.

Will apply.

Regards,
Marton

>
> Signed-off-by: Marton Balint <cus at passwd.hu>
> ---
> fftools/ffmpeg.c | 26 +++++++++++++-------------
> 1 file changed, 13 insertions(+), 13 deletions(-)
>
> diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
> index 435e12a37b..71d4067a6c 100644
> --- a/fftools/ffmpeg.c
> +++ b/fftools/ffmpeg.c
> @@ -497,11 +497,12 @@ static void print_report(int is_last_report, int64_t timer_start, int64_t cur_ti
>     int vid;
>     double bitrate;
>     double speed;
> -    int64_t pts = INT64_MIN + 1;
> +    int64_t pts = AV_NOPTS_VALUE;
>     static int64_t last_time = -1;
>     static int first_report = 1;
>     uint64_t nb_frames_dup = 0, nb_frames_drop = 0;
> -    int hours, mins, secs, us;
> +    int mins, secs, us;
> +    int64_t hours;
>     const char *hours_sign;
>     int ret;
>     float t;
> @@ -553,7 +554,8 @@ static void print_report(int is_last_report, int64_t timer_start, int64_t cur_ti
>         }
>         /* compute min output value */
>         if (ost->last_mux_dts != AV_NOPTS_VALUE) {
> -            pts = FFMAX(pts, ost->last_mux_dts);
> +            if (pts == AV_NOPTS_VALUE || ost->last_mux_dts > pts)
> +                pts = ost->last_mux_dts;
>             if (copy_ts) {
>                 if (copy_ts_first_pts == AV_NOPTS_VALUE && pts > 1)
>                     copy_ts_first_pts = pts;
> @@ -566,23 +568,21 @@ static void print_report(int is_last_report, int64_t timer_start, int64_t cur_ti
>             nb_frames_drop += ost->last_dropped;
>     }
>
> -    secs = FFABS(pts) / AV_TIME_BASE;
> -    us = FFABS(pts) % AV_TIME_BASE;
> -    mins = secs / 60;
> -    secs %= 60;
> -    hours = mins / 60;
> -    mins %= 60;
> +    us    = FFABS64U(pts) % AV_TIME_BASE;
> +    secs  = FFABS64U(pts) / AV_TIME_BASE % 60;
> +    mins  = FFABS64U(pts) / AV_TIME_BASE / 60 % 60;
> +    hours = FFABS64U(pts) / AV_TIME_BASE / 3600;
>     hours_sign = (pts < 0) ? "-" : "";
>
> -    bitrate = pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
> -    speed = t != 0.0 ? (double)pts / AV_TIME_BASE / t : -1;
> +    bitrate = pts != AV_NOPTS_VALUE && pts && total_size >= 0 ? total_size * 8 / (pts / 1000.0) : -1;
> +    speed   = pts != AV_NOPTS_VALUE && t != 0.0 ? (double)pts / AV_TIME_BASE / t : -1;
>
>     if (total_size < 0) av_bprintf(&buf, "size=N/A time=");
>     else                av_bprintf(&buf, "size=%8.0fkB time=", total_size / 1024.0);
>     if (pts == AV_NOPTS_VALUE) {
>         av_bprintf(&buf, "N/A ");
>     } else {
> -        av_bprintf(&buf, "%s%02d:%02d:%02d.%02d ",
> +        av_bprintf(&buf, "%s%02"PRId64":%02d:%02d.%02d ",
>                    hours_sign, hours, mins, secs, (100 * us) / AV_TIME_BASE);
>     }
>
> @@ -603,7 +603,7 @@ static void print_report(int is_last_report, int64_t timer_start, int64_t cur_ti
>     } else {
>         av_bprintf(&buf_script, "out_time_us=%"PRId64"\n", pts);
>         av_bprintf(&buf_script, "out_time_ms=%"PRId64"\n", pts);
> -        av_bprintf(&buf_script, "out_time=%s%02d:%02d:%02d.%06d\n",
> +        av_bprintf(&buf_script, "out_time=%s%02"PRId64":%02d:%02d.%06d\n",
>                    hours_sign, hours, mins, secs, us);
>     }
>
> -- 
> 2.35.3
>
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