On Tue, Apr 7, 2020 at 5:14 PM Ryo Hirafuji <ryo.hiraf...@gmail.com> wrote:
>
> From: Ryo Hirafuji <p...@7io.org>
>
> AV1 support lossless encoding.
> In this patch, I added a command line flag to enable it.
>
> Fixes ticket #7600
> ---
> libavcodec/libaomenc.c | 14 +++++++++++---
> 1 file changed, 11 insertions(+), 3 deletions(-)
>
> [...]
> @@ -574,7 +577,9 @@ static av_cold int aom_init(AVCodecContext *avctx,
> if (avctx->rc_min_rate == avctx->rc_max_rate &&
> avctx->rc_min_rate == avctx->bit_rate && avctx->bit_rate) {
> enccfg.rc_end_usage = AOM_CBR;
> - } else if (ctx->crf >= 0) {
> + } else if (ctx->crf == 0) {
> + enccfg.rc_end_usage = AOM_Q;
I saw the earlier comments around using crf=0 as the trigger for this.
libaom will behave differently with q vs cq mode. This also differs
from the -lossless in libvpxenc where this feature originated; mostly
we've been mapping options one to one with vpx/aomenc. Let me ask
around about the preference for lossless usage in libaom.
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
