[HELP] Reds turning orange

[Whitehawkx]

Hello, I've been having an issue where reds on anime are turning orange after converting them. This has been ongoing for a while now and is still present in the latest release. Full details below.

Version used: rev 2022.11.28.1
debug log: https://drive.google.com/file/d/1y32Y-P7...share_link
3 second clip for testing: https://drive.google.com/file/d/1aAqh-9a...share_link
Before/After showing issue: https://imgsli.com/MTQwNzkz
(Note: it looks like all colors are affected, but reds are most noticeable)

Settings / Steps (everything default except what's mentioned)

1. Open Hybrid, set input file (attached above) and output name
2. Set x264 > Base
    a. AVC Profile/Level set to High10, 5.2
    b. bitrate set to 9000
    c. calculation precision: 10bit (using 8bit made no difference)
    d. preset: fast
3. Set x264 > Frames
    a. ref frames: 5
    b. b-frames: 16
4. Set Filtering options
    a. Auto deinterlace handling: TIVTC (Vapoursynth)   (also tried Avisynth but same results)
    b. FM Speed: slower
    c. Deinterlacer: QTGMC (very slow)
5. Start queue

Any ideas what might be happening here? Appreciate the help.

[Selur]

Seems like the wrong color matrix is signaled.
I'll look into it tomorrow (on my way to bed now).
Input has bt470gb, but x264 wrongly signals bt709.
Seems like there's a bug in the auto adjusting of the color matrix in x264s VUI to the input.
-> try disabling "x264->VUI->Video Useability Information->Color Matrix->to input" and setting "x264->VUI->Video Useability Information->Color Matrix" to "bt470gb"

---
quick look at the source:
Hybrid doesn't find any color matrix info in the source

Video
Count                                    : 383
Count of stream of this kind             : 1
Kind of stream                           : Video
Kind of stream                           : Video
Stream identifier                        : 0
StreamOrder                              : 0
ID                                       : 1
ID                                       : 1
ID in the original source medium         : 224
ID in the original source medium         : 224 (0xE0)
Unique ID                                : 10247548616594038797
Format                                   : MPEG Video
Format                                   : MPEG Video
Commercial name                          : MPEG-2 Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings                          : CustomMatrix / BVOP
Format settings, BVOP                    : Yes
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Custom
Format settings, Matrix                  : Custom
Format_Settings_Matrix_Data              : 080808080808080808080808080808080808080808080808080808080909090808080808080808080909090A09090909090A0A0A0A0A0C0C0C0C0E0E0F111115 / 08080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808080808
Format settings, GOP                     : Variable
Internet media type                      : video/MPV
Codec ID                                 : V_MPEG2
Codec ID/Info                            : MPEG 1 or 2 Video
Codec ID/Url                             : http://ffdshow-tryout.sourceforge.net/
Duration                                 : 3370.000000
Duration                                 : 3 s 370 ms
Duration                                 : 3 s 370 ms
Duration                                 : 3 s 370 ms
Duration                                 : 00:00:03.370
Duration                                 : 00:00:03.370
Bit rate mode                            : VBR
Bit rate mode                            : Variable
Bit rate                                 : 5810673
Bit rate                                 : 5 811 kb/s
Maximum bit rate                         : 9800000
Maximum bit rate                         : 9 800 kb/s
Width                                    : 720
Width                                    : 720 pixels
Height                                   : 480
Height                                   : 480 pixels
Sampled_Width                            : 720
Sampled_Height                           : 480
Pixel aspect ratio                       : 0.889
Display aspect ratio                     : 1.333
Display aspect ratio                     : 4:3
Frame rate mode                          : VFR
Frame rate mode                          : Variable
Frame rate                               : 10688.131
Frame rate                               : 10 688.131 FPS
Original frame rate                      : 23.976
Original frame rate                      : 23.976 (24000/1001) FPS
FrameRate_Original_Num                   : 24000
FrameRate_Original_Den                   : 1001
Frame count                              : 36019
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Chroma subsampling                       : 4:2:0
Bit depth                                : 8
Bit depth                                : 8 bits
Scan type                                : Progressive
Scan type                                : Progressive
Scan order                               : 2:3 Pulldown
Scan order                               : 2:3 Pulldown
Compression mode                         : Lossy
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.002
Delay                                    : 0
Delay                                    : 00:00:00.000
Delay                                    : 00:00:00.000
Delay, origin                            : Container
Delay, origin                            : Container
Delay_Original                           : 4393968
Delay_Original                           : 1 h 13 min
Delay_Original                           : 1 h 13 min 13 s 968 ms
Delay_Original                           : 1 h 13 min
Delay_Original                           : 01:13:13.968
Delay_Original                           : 01:13:13.968
Delay_Original_Settings                  : drop_frame_flag=0 / closed_gop=1 / broken_link=0
Delay_Original_DropFrame                 : No
Delay_Original_Source                    : Stream
Time code of first frame                 : 01:13:13:29
TimeCode_DropFrame                       : No
Time code source                         : Group of pictures header
GOP, Open/Closed                         : Open
GOP, Open/Closed                         : Open
GOP, Open/Closed of first frame          : Closed
GOP, Open/Closed of first frame          : Closed
Stream size                              : 1074546780
Stream size                              : 1.00 GiB
Stream size                              : 1 GiB
Stream size                              : 1.0 GiB
Stream size                              : 1.00 GiB
Stream size                              : 1.001 GiB
Language                                 : en
Language                                 : English
Language                                 : English
Language                                 : en
Language                                 : eng
Language                                 : en
Default                                  : No
Default                                  : No
Forced                                   : No
Forced                                   : No
Buffer size                              : 229376
colour_description_present               : Yes
colour_description_present_Source        : Container
Color range                              : Limited
colour_range_Source                      : Container
Original source medium                   : DVD-Video
intra_dc_precision                       : 10

and selected 'bt709' since input is MPEG-2 and TV scale. (Which is correct for normal MPEG-2, but since yours is from a DVD it's wrong. )


Cu Selur

[Selur]

Wrote a workaround for it so that if the source was DVD (Mediainfo reports: 'Original source medium : DVD-Video'), Hybrid will guess 'bt470gb'.
Send you a link to a dev version via pm, which hopefully should fix the issue. (jobs need to be recreated)

Cu Selur

[Whitehawkx]

Thank you for the detailed breakdown of what's happening. I tested the new build you sent, and it seems to have resolved the issue. Colors are now matching the source after converting. Appreciate the help with this.