[FFmpeg-devel] [PATCH 3/3] avformat/mov: remove an always true condition

[Zhao Zhili]

> On Sep 18, 2020, at 10:33 PM, Zhao Zhili <quinkblack at foxmail.com> wrote:
> 
> From: Zhao Zhili <zhilizhao at tencent.com>
> 
> ---
> libavformat/mov.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libavformat/mov.c b/libavformat/mov.c
> index 9fc0db24d5..f99605c2cd 100644
> --- a/libavformat/mov.c
> +++ b/libavformat/mov.c
> @@ -1475,7 +1475,7 @@ static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom)
>     c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
>     // set the AVFormatContext duration because the duration of individual tracks
>     // may be inaccurate
> -    if (c->time_scale > 0 && !c->trex_data)
> +    if (!c->trex_data)
>         c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);
>     avio_rb32(pb); /* preferred scale */

Ping for review.

The always true condition is not obvious in the patch. time_scale is checked a few lines before explicitly.

1471     if (c->time_scale <= 0) {
1472         av_log(c->fc, AV_LOG_ERROR, "Invalid mvhd time scale %d, defaulting to 1\n", c->time_scale);
1473         c->time_scale = 1;
1474     }
1475     av_log(c->fc, AV_LOG_TRACE, "time scale = %i\n", c->time_scale);
1476
1477     c->duration = (version == 1) ? avio_rb64(pb) : avio_rb32(pb); /* duration */
1478     // set the AVFormatContext duration because the duration of individual tracks
1479     // may be inaccurate
1480     if (c->time_scale > 0 && !c->trex_data)
1481         c->fc->duration = av_rescale(c->duration, AV_TIME_BASE, c->time_scale);


> 
> -- 
> 2.25.1
>