On Sat, Sep 18, 2021 at 4:27 AM <lance.lmw...@gmail.com> wrote:
>
> From: Limin Wang <lance.lmw...@gmail.com>
>
> Signed-off-by: Limin Wang <lance.lmw...@gmail.com>
> ---
Commit message should probably be something along the lines of
"""
avcodec/libsvtav1: properly enforce CQP mode when set in wrapper
SVT-AV1 seems to have switched their default from CQP to CRF in February,
so enforce the controlling option accordingly.
"""
> libavcodec/libsvtav1.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/libavcodec/libsvtav1.c b/libavcodec/libsvtav1.c
> index 0dc25ca..b029e01 100644
> --- a/libavcodec/libsvtav1.c
> +++ b/libavcodec/libsvtav1.c
> @@ -208,6 +208,8 @@ static int config_enc_params(EbSvtAv1EncConfiguration
> *param,
> if (param->rate_control_mode) {
> param->max_qp_allowed = avctx->qmax;
> param->min_qp_allowed = avctx->qmin;
> + } else {
> + param->enable_tpl_la = 0; /* CQP need turn off enable_tp_la */
As the default changing in the underlying library has now shown us, I
think (for now) it's better to move this next to
param->rate_control_mode earlier in the function, and then do
something like:
param->enable_tpl_la = !!param->rate_control_mode;
(I would have utilized param->enable_tpl_la = param->rate_control_mode
== SVTAV1_RC_MODE_CQP;` but alas SVT-AV1 does not have such
enums/defines that make such things more readable).
This way the parameter is set correctly no matter if the default is
switched over at SVT-AV1. In the future the wrapper can be reworked so
that by default SVT-AV1's own rate control defaults are utilized, and
then if either bit rate or cqp or something like that is set, we can
start enforcing that.
Jan
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