[FFmpeg-user] Color matching to source a problem for ProRes

[Pete Willis]

We are trying to match the output colour to the source content but although the output formats matches the source we cannot get it to match.

Screenshot attached of the 3 outputs plus the original (top right) we have tested with media info for each:


Using these settings:


flags=lanczos,colormatrix=bt601:bt709 [v] -acodec pcm_s24le -b:a 128k -b:v 512k -vcodec prores_ks -r 23.976023976023978 -f mov -profile:v 3 -qscale 4 -pix_fmt yuv422p -y -map [v] -map [a] -timecode 00:59:53:00 /videos/C1234_100_12HD_TestRaw.mov


We have also tried -pix_fmt yuv422p10le (number 4 in the image)

Removing the flags=lanczos (Number 3)

 
Below is the media info for each

1. (Top left) output
Video
ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422 HQ
Codec ID                                 : apch
Duration                                 : 37s 37ms
Bit rate mode                            : Variable
Bit rate                                 : 124 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) fps
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 2.485
Stream size                              : 546 MiB (98%)
Writing library                          : Lavc
Language                                 : English
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709


2. (Top right) source content

ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422 HQ
Codec ID                                 : apch
Duration                                 : 37s 37ms
Bit rate mode                            : Variable
Bit rate                                 : 89.7 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) fps
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 1.805
Stream size                              : 396 MiB (98%)
Writing library                          : aut0
Language                                 : English
Encoded date                             : UTC 2017-04-26 17:06:27
Tagged date                              : UTC 2017-04-26 17:06:27
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709
matrix_coefficients_Original             : BT.709


3. (Bottom left)

ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422 HQ
Codec ID                                 : apch
Duration                                 : 37s 37ms
Bit rate mode                            : Variable
Bit rate                                 : 123 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) fps
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 2.478
Stream size                              : 544 MiB (98%)
Writing library                          : Lavc
Language                                 : English

4. Bottom (right)

ID                                       : 1
Format                                   : ProRes
Format version                           : Version 0
Format profile                           : 422 HQ
Codec ID                                 : apch
Duration                                 : 37s 37ms
Bit rate mode                            : Variable
Bit rate                                 : 119 Mbps
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 23.976 (24000/1001) fps
Color space                              : YUV
Chroma subsampling                       : 4:2:2
Scan type                                : Progressive
Bits/(Pixel*Frame)                       : 2.398
Stream size                              : 526 MiB (98%)
Writing library                          : Lavc
Language                                 : English
Matrix coefficients                      : BT.709