[FFmpeg-devel] [PATCH v2] avformat/hlsenc: Fix initial setting for start_pts

[Steven Liu]

> 2020年3月6日 上午11:58，Hongcheng Zhong <sj.hc_zhong at sjtu.edu.cn> 写道：
> 
> This patch fixes Bug #8469
> If x264 baseline profile is used with other profiles,
> start_pts will be initialized to audio stream's first pts,
> while the duration is calculated based on video stream's pts.
> In this patch the start_pts is initialized with the correct stream's first pts.
> 
> Signed-off-by: Hongcheng Zhong <sj.hc_Zhong at sjtu.edu.cn>
> ---
> libavformat/hlsenc.c | 7 +++++++
> 1 file changed, 7 insertions(+)
> 
> diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c
> index f6dd894..19aa2b1 100644
> --- a/libavformat/hlsenc.c
> +++ b/libavformat/hlsenc.c
> @@ -126,6 +126,7 @@ typedef struct VariantStream {
>     int has_video;
>     int has_subtitle;
>     int new_start;
> +    int start_pts_from_audio;
>     double dpp;           // duration per packet
>     int64_t start_pts;
>     int64_t end_pts;
> @@ -2274,6 +2275,12 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
> 
>     if (vs->start_pts == AV_NOPTS_VALUE) {
>         vs->start_pts = pkt->pts;
> +        if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
> +            vs->start_pts_from_audio = 1;
> +    }
> +    if (vs->start_pts_from_audio && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && vs->start_pts > pkt->pts) {
> +        vs->start_pts = pkt->pts;
> +        vs->start_pts_from_audio = 0;
>     }
> 
>    if (vs->has_video) {
> -- 
> 2.7.4
> 
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LGTM

Thanks
Steven