> -----Original Message----- > From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf > Of Carl Eugen Hoyos > Sent: Sunday, May 12, 2019 18:45 > To: FFmpeg development discussions and patches <ffmpeg- > de...@ffmpeg.org> > Subject: Re: [FFmpeg-devel] [PATCH 1/3] avutil: Add NV24 and NV42 pixel > formats > > Am So., 12. Mai 2019 um 05:38 Uhr schrieb Fu, Linjie <linjie...@intel.com>: > > > I'm working on adding support for HEVC 4:2:2/ 4:4:4, 8/10 bit, in vaapi > decoding. > > And I'm aslo thinking of add some new pix_fmt for packed FourCC: > > 444 8 bit : AYUV > > 444 10 bit: Y410 > > 422 10 bit: Y210 > > Do I understand correctly that for 420 8 bit, vaapi produces the > decoded image in a planar format but for 444 8 bit (and 10 bit), > you decided that a packed format makes more sense? > (Aren't luma and chroma stored independently in hevc?) >
It's true that for 420 8 bit, the decoded image is in planar format. But as to 444 8 bit(and 10 bit), as far as I know in media driver , the decoded image is produced in packed format. See: https://github.com/intel/media-driver/blob/8773ef5e82e8a151e1bcfef317f7808f319c91c2/media_driver/linux/gen11/ddi/media_libva_caps_g11.cpp#L842 else if(profile == VAProfileHEVCMain444 || profile == VAProfileVP9Profile1) { attribs[i].type = VASurfaceAttribPixelFormat; attribs[i].value.type = VAGenericValueTypeInteger; attribs[i].flags = VA_SURFACE_ATTRIB_GETTABLE | VA_SURFACE_ATTRIB_SETTABLE; attribs[i].value.value.i = VA_FOURCC_AYUV; i++; } > Note that no matter what you do with the decoded image, there > will be a (measurable) performance hit because of the needed > transformation into something (planar) that other filters and > encoders understand. Agree, the directly decoded format is better. And it's also one of the reasons I'd like to add these packed formats. Linjie _______________________________________________ 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".
