2018-08-01 21:24 GMT+02:00, Kirk Liberty <[email protected]>: > On Wed, Aug 1, 2018 at 2:00 PM, Carl Eugen Hoyos <[email protected]> wrote: >> 2018-08-01 6:12 GMT+02:00, Kirk Liberty <[email protected]>: >>> On Tue, Jul 31, 2018 at 7:04 PM, Carl Eugen Hoyos <[email protected]> >>> wrote: >>>> >>>> 2018-07-29 0:16 GMT+02:00, Kirk Liberty <[email protected]>: >>>> > My plan is to use the YCgCo >>>> > colorspace to get lossless conversion of rgb->yuv->rgb >>>> >>>> This conversion (may be lossless in theory but) is not lossless >>>> with FFmpeg, both x264 and libvpx-vp9 support encoding rgb >>>> which can be lossless. >>> >>> Why is YCgCo not lossless in FFmpeg? >> >> It is / can be. >> What is not lossless is the conversion from PIX_FMT_GBR* (or RGB*) >> to PIX_FMT_YUV* > > Are you referring to rgba2ycocg() in texturedspenc.c?
No. You wrote above "lossless conversion of rgb->yuv->rgb" and i am telling you that this is not possible with FFmpeg when using libvpx-vp9 or x264. Both libvpx-vp9 and x264 support rgb encoding and both can encode in a lossless fashion. If you have an additional question concerning FFmpeg usage, please provide the command line you tested together with the complete, uncut console output. Carl Eugen _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
