Lynne, could you tell me your idea? 2020年4月5日(日) 19:39 Ryo Hirafuji <ryo.hiraf...@link-u.co.jp>:
> > I would prefer this but I am not the maintainer. > > Oh, I see. > > Hi, Rostislav Pehlivanov, please tell me your idea. > (How can I address him/her in ML...?) > > I think it is more useful to execute this line when "-crf 0" is set: > > > codecctl_int(avctx, AV1E_SET_LOSSLESS, ctx->lossless); > > It could let users force lossless video more easily and robustly, because > libaom prepared such an option. > > It is true the following settings will enable lossless encoding, but these > conditions may change with libaom change: > > > If these conditions are not met, "-crf 0" will be lossless: > > > > <<FFmpeg options>> > > "-bit_rate 0" (which means, enccfg.rc_end_usage = AOM_Q) > > "-aq-mode none" > > "-enable_restoration 0" > > > > <<the libaom settings which can't be configured from FFmpeg yet>> > > AV1E_SET_ENABLE_CHROMA_DELTAQ must be 0 > > AV1E_SET_ENABLE_SUPERRES must be 0 > > > 2020年4月5日(日) 18:06 Carl Eugen Hoyos <ceffm...@gmail.com>: > >> Am Sa., 4. Apr. 2020 um 18:46 Uhr schrieb Ryo Hirafuji >> <ryo.hiraf...@link-u.co.jp>: >> > >> > > In an ideal world, crf 0 would force all other settings for a lossless >> > > encoding. >> > >> > I forgot to say that if "-lossless 1" is set, "crf" will also be 0 (in >> > libaom, internally). >> > >> > All those conditions will be forced (ot at least checked by libaom) if >> we >> > execute this line: >> > >> > > codecctl_int(avctx, AV1E_SET_LOSSLESS, ctx->lossless); >> > >> > So, how about executing this line if the "-crf 0" is set? >> >> I would prefer this but I am not the maintainer. >> >> See also: >> >> https://patchwork.ffmpeg.org/project/ffmpeg/patch/CAB0OVGr6o6yR3bVAgJix7R7mZCRRVruw=jqa7wgjb+hq2bv...@mail.gmail.com/ >> >> Carl Eugen >> _______________________________________________ >> 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". > > _______________________________________________ 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".
