[FFmpeg-devel] [PATCH v1 1/1] lavc/qsvenc: disable SEI frame before each P-frame

[Xiang, Haihao]

Hi,
How can I disable SEI frame? Is there any other option?

You may use option -scenario <arg> to indicate the scenario for the encoding session, but I'm not sure whether your runtime has the optimization for SEI.

Thanks
Haihao



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________________________________
发件人: Xiang, Haihao <haihao.xiang at intel.com>
发送时间: Monday, August 7, 2023 10:06:41 AM
收件人: ffmpeg-devel at ffmpeg.org <ffmpeg-devel at ffmpeg.org>
抄送: siriushu at hotmail.com <siriushu at hotmail.com>
主题: Re: [FFmpeg-devel] [PATCH v1 1/1] lavc/qsvenc: disable SEI frame before each P-frame

On So, 2023-08-06 at 19:54 +0800, Ting Hu wrote:
> From: tinghu3 <siriushu at hotmail.com>
>
> In order to save bandwith for video conference application,
> set pic_timing_sei of av_option to disable SEI frames.
> It doesn't take effect.
>
> Signed-off-by: tinghu3 <siriushu at hotmail.com>
> ---
>  libavcodec/qsvenc.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/libavcodec/qsvenc.c b/libavcodec/qsvenc.c
> index df63c182b0..7a5ea5391e 100644
> --- a/libavcodec/qsvenc.c
> +++ b/libavcodec/qsvenc.c
> @@ -937,7 +937,7 @@ static int init_video_param(AVCodecContext *avctx,
> QSVEncContext *q)
>          q->extco.Header.BufferSz      = sizeof(q->extco);
>
>          q->extco.PicTimingSEI         = q->pic_timing_sei ?
> -                                        MFX_CODINGOPTION_ON :
> MFX_CODINGOPTION_UNKNOWN;
> +                                        MFX_CODINGOPTION_ON :
> MFX_CODINGOPTION_OFF;

PicTimingSEI and RefPicMarkRep are tristate flags. When a tristate flag is set
to MFX_CODINGOPTION_UNKNOWN(0), the SDK encoder can choose a best configuration
based on the current state and settings. We want to the SDK encoder set
reasonable values for these flags

Thanks
Haihao

>          q->old_pic_timing_sei = q->pic_timing_sei;
>
>          if (q->rdo >= 0)
> @@ -968,6 +968,7 @@ static int init_video_param(AVCodecContext *avctx,
> QSVEncContext *q)
>              q->extco.AUDelimiter          = q->aud ? MFX_CODINGOPTION_ON :
> MFX_CODINGOPTION_OFF;
>          }
>
> +        q->extco.RefPicMarkRep = q->pic_timing_sei ? MFX_CODINGOPTION_ON :
> MFX_CODINGOPTION_OFF;
>          q->extparam_internal[q->nb_extparam_internal++] = (mfxExtBuffer *)&q-
> >extco;
>
>          if (avctx->codec_id == AV_CODEC_ID_H264) {