Matrix coefficients

[AG13]

Hi, anyone can tell me how i can add Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177 to my videos ?

[Selur]

While encoding to x264:

Video Usability Info (Annex E):
The VUI settings are not used by the encoder but are merely suggestions to
the playback equipment. See doc/vui.txt for details. Use at your own risk.

      --overscan <string>     Specify crop overscan setting ["undef"]
                                  - undef, show, crop
      --videoformat <string>  Specify video format ["undef"]
                                  - component, pal, ntsc, secam, mac, undef
      --range <string>        Specify color range ["auto"]
                                  - auto, tv, pc
      --colorprim <string>    Specify color primaries ["undef"]
                                  - undef, bt709, bt470m, bt470bg, smpte170m,
                                    smpte240m, film, bt2020
      --transfer <string>     Specify transfer characteristics ["undef"]
                                  - undef, bt709, bt470m, bt470bg, smpte170m,
                                    smpte240m, linear, log100, log316,
                                    iec61966-2-4, bt1361e, iec61966-2-1,
                                    bt2020-10, bt2020-12
      --colormatrix <string>  Specify color matrix setting ["???"]
                                  - undef, bt709, fcc, bt470bg, smpte170m,
                                    smpte240m, GBR, YCgCo, bt2020nc, bt2020c
      --chromaloc <integer>   Specify chroma sample location (0 to 5) [0]
      --nal-hrd <string>      Signal HRD information (requires vbv-bufsize)
                                  - none, vbr, cbr (cbr not allowed in .mp4)
      --filler                Force hard-CBR and generate filler (implied by
                              --nal-hrd cbr)
      --pic-struct            Force pic_struct in Picture Timing SEI
      --crop-rect <string>    Add 'left,top,right,bottom' to the bitstream-level
                              cropping rectangle

source: x264 --fullhelp
-> usind --colormatrix <string> would be what you want
While encoding to x265:

VUI options:
   --sar <width:height|int>      Sample Aspect Ratio, the ratio of width to height of an individual pixel.
                                 Choose from 0=undef, 1=1:1("square"), 2=12:11, 3=10:11, 4=16:11,
                                 5=40:33, 6=24:11, 7=20:11, 8=32:11, 9=80:33, 10=18:11, 11=15:11,
                                 12=64:33, 13=160:99, 14=4:3, 15=3:2, 16=2:1 or custom ratio of <int:int>. Default 0
   --crop-rect <string>          Add 'left,top,right,bottom' to the bitstream-level cropping rectangle
   --overscan <string>           Specify whether it is appropriate for decoder to show cropped region: undef, show or crop. Default undef
   --videoformat <string>        Specify video format from undef, component, pal, ntsc, secam, mac. Default undef
   --range <string>              Specify black level and range of luma and chroma signals as full or limited Default limited
   --colorprim <string>          Specify color primaries from undef, bt709, bt470m, bt470bg, smpte170m,
                                 smpte240m, film, bt2020. Default undef
   --transfer <string>           Specify transfer characteristics from undef, bt709, bt470m, bt470bg, smpte170m,
                                 smpte240m, linear, log100, log316, iec61966-2-4, bt1361e, iec61966-2-1,
                                 bt2020-10, bt2020-12. Default undef
   --colormatrix <string>        Specify color matrix setting from undef, bt709, fcc, bt470bg, smpte170m,
                                 smpte240m, GBR, YCgCo, bt2020nc, bt2020c. Default undef
   --chromaloc <integer>         Specify chroma sample location (0 to 5). Default of 0

source: x264 -help
-> usind --colormatrix <string> would be what you want.

If you want to modify this information on an existing H.264 raw stream you could use the modified ffmpeg version from roozhou.

Cu Selur

[AG13]

Thanks