Hybrid does change from 4:3 to 5:4 when reencoding (deinterlace)

[Platos]

I wanted to deinterlace and use sRetore in a video and i saw, the aspect ratio got changed. Strange is, in mediainfo it shows the same resolution, but different aspect ratio and i see it in the video, its true. I dont use resizer. it happens when i only deinterlace and also when i do both.

Here is the Video: https://uploadnow.io/de/share?utm_source=23JVW9p

[jagabo]

I don't use Hybrid but you usually can fix this by specifying the display aspect ratio (4:3) or sample aspect ratio (12:11) in the compression codec, or in the container metadata, or both.

[Platos]

Yeah, but i dont find such a setting to force a specific aspect ratio in Hybrid.

[Selur]

Probably a bug in the muxing or something, since you didn't care to share details,....
What I did:

• Start Hybrid
• load source (soure is detected as PAR 16:5 = 1.067)
• set x264 to crf and check the command line:
  

  x264 --preset veryfast --crf 18.00 --profile high --level 4.1 --ref 3 --direct auto --b-adapt 0 --sync-lookahead 11 --qcomp 0.50 --rc-lookahead 40 --qpmax 51 --partitions i4x4,p8x8,b8x8 --no-fast-pskip --subme 5 --aq-mode 0 --vbv-maxrate 62500 --vbv-bufsize 78125 --sar 16:15 --qpfile GENERATED_QP_FILE --non-deterministic --range tv --colormatrix bt470bg --demuxer raw --input-res 720x576 --input-csp i420 --input-range tv --input-depth 8 --fps 50/1 --output-depth 8 --output "J:\tmp\Naruto DVD Folge 4_3 min.264" -

PAR is properly set there,.. (--sar 16:15)
create an run a job, check the output of the job with mediainfo:

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
Format                                   : AVC
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Format/Url                               : http://developers.videolan.org/x264.html
Commercial name                          : AVC
Format profile                           : High@L4.1
Format settings                          : CABAC / 4 Ref Frames
Format settings, CABAC                   : Yes
Format settings, CABAC                   : Yes
Format settings, Reference frames        : 4
Format settings, Reference frames        : 4 frames
Internet media type                      : video/H264
Codec ID                                 : avc1
Codec ID/Info                            : Advanced Video Coding
Duration                                 : 120320
Duration                                 : 2 min 0 s
Duration                                 : 2 min 0 s 320 ms
Duration                                 : 2 min 0 s
Duration                                 : 00:02:00.320
Duration                                 : 00:02:00:08
Duration                                 : 00:02:00.320 (00:02:00:08)
Bit rate                                 : 832549
Bit rate                                 : 833 kb/s
Maximum bit rate                         : 3612224
Maximum bit rate                         : 3 612 kb/s
Width                                    : 720
Width                                    : 720 pixels
Height                                   : 576
Height                                   : 576 pixels
Sampled_Width                            : 720
Sampled_Height                           : 576
Pixel aspect ratio                       : 1.067
Display aspect ratio                     : 1.333
Display aspect ratio                     : 4:3
Rotation                                 : 0.000
Frame rate mode                          : CFR
Frame rate mode                          : Constant
Frame rate                               : 25.000
Frame rate                               : 25.000 FPS
FrameRate_Num                            : 25
FrameRate_Den                            : 1
Frame count                              : 3008
Standard                                 : PAL
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
Bits/(Pixel*Frame)                       : 0.080
Stream size                              : 12521540
Stream size                              : 11.9 MiB (100%)
Stream size                              : 12 MiB
Stream size                              : 12 MiB
Stream size                              : 11.9 MiB
Stream size                              : 11.94 MiB
Stream size                              : 11.9 MiB (100%)
Proportion of this stream                : 0.99697
Writing library                          : x264 - core 164 r3107 a8b68eb
Writing library                          : x264 core 164 r3107 a8b68eb
Encoded_Library_Name                     : x264
Encoded_Library_Version                  : core 164 r3107 a8b68eb
Encoding settings                        : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x3:0x111 / me=hex / subme=5 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=0 / threads=18 / lookahead_threads=4 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=0 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=1 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.50 / qpmin=0 / qpmax=51 / qpstep=4 / vbv_maxrate=62500 / vbv_bufsize=78125 / crf_max=0.0 / nal_hrd=none / filler=0 / ip_ratio=1.40 / aq=1:0.00
Encoded date                             : 2023-05-01 18:53:04 UTC
Tagged date                              : 2023-05-01 18:53:04 UTC
colour_description_present               : Yes
colour_description_present_Source        : Container / Stream
Color range                              : Limited
colour_range_Source                      : Container / Stream
colour_primaries_Source                  : Container / Stream
transfer_characteristics_Source          : Container / Stream
Matrix coefficients                      : BT.470 System B/G
matrix_coefficients_Source               : Container / Stream
mdhd_Duration                            : 120400
Codec configuration box                  : avcC

Pixel aspect ratio seems to be properly set to 1.067.
=> can't reproduce with the current details. (Additionally tried NVEncC with H264 and H265, same result, output has the correct PAR.)
Properly create a debug output of the issue and I can look into it further.

Cu Selur

Ps.: I managed to reproduce the issue when NVEncC with AV1 is used, but this does not seem like a bug in Hybrid, but a bug in either NVEncC or MP4Box. -> Will report to the NVEncC author, in case you are not using NVEncC with AV1, a debug output is still needed,...
Reported the av1 issue to the author: https://github.com/rigaya/NVEnc/issues/484
(thought issue was fixed in 7.23, but it's still present in 7.24)

[Platos]

How can i share details ? I would have shared, but i dont know, where i can see a log or what you need ?

But i tried now again and found the problem: It's AV1. When i use CPU x264 it does not happen. When i use NVEnc and x265 it does not happen. When i use NVEnc and AV1 it does happen.

What details do i have to share? Logfile in Hybrid? Where can i find it?

So than it's solved for me. But if you want further details tell me, i can give, if it's a problem in hybrid or so. But tell me which details pls.

[Selur]

Yes, NVEncC doesn't set sar infos when AV1, for raw AV1 output.

In AV1 encoding, sar is container side information. Therefore, to avoid this problem, do not write in raw AV1 and write in containers such as mkv or mp4 format, and you'll have sar applied.

Seems like AV1 raw output doesn't have sar metadata. For example ffmpeg bsf av1_metadata also cannot apply sample_aspect_ratio, but h264_metadata has sample_aspect_ratio.

from the author of NVEncC -> will look on a workaround when I find some time after work this evening.

What details do i have to share? Logfile in Hybrid? Where can i find it?

see: https://www.selur.de/support

Cu Selur

Ps.: wrote a workaround when mp4box is used or ffmpeg is used, but there's a bug in mkvmerge atm. so I'm waiting on that (reported to the developer)

[Selur]

Send you a link to a dev version which should set the container flags and thus workaround th issue.

[Platos]

Thanks, i will try it.