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From 5:4 to 4:3 - Printable Version

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RE: From 5:4 to 4:3 - Bartoloni - 15.06.2023

Sorry Selur boring you (again) but there is something that i can't understand how works ...  i read a lot about SAR PAR and formats
BUT... i'm using latest dev version...

i have an input AVI that is 720x576 (recorded from pal source)
i place it on Hybrid, to make sure OLD TV can play the deinterlaced output .. just set a RESIZE to 768x576 (leaving PAR without any change) .. mediainfo is (correclty) showing that my input clip is a 5:4 format (correct from PAL)
opening the preview of Hybrid is showed a nice and correct 4:3-Like preview (something like from 5:4 -720x576 to 4:3 768x576)
BUT .. after rendering... VLC is showing a 16:9 clip (saved as 768x576) and also mediainfo is showing the clip as a: 16:9

from where come from this 16:9 if i don't use 16:9 clips ? ... and i just selected on Hybrid a resize? (i have also deleted the Hybrid configuration folder and also reinstalled from scratch)

here a video about what happens: www.wcn.it/D3GOXB23C4.mp4

and attached there is the mediainfo of the output file

[EDIT] installed the standard release of Hybrid and my output is correctly a 4:3... there is something wrong with the DEV version? [/EDIT]

RE: From 5:4 to 4:3 - Selur - 15.06.2023

16:9 is the DAR, by changing the SAR, you are also changing the DAR.
Without a debug output I can't really tell what you are doing.
Read the sticky and provide proper data and I can try to reproduce what you did.
I'm not going through some video of what you are doing,..

Cu Sekur

RE: From 5:4 to 4:3 - Bartoloni - 15.06.2023

very thank you for your time
here the debug: www.wcn.it/debug.zip
here the clip i used: www.wcn.it/test.avi

doing some more tests seems that using the MKV container show the issue ( a 16:9 output ).. using the MP4 container the output is a correct 4:3. (looking at mediainfo and on played video)

RE: From 5:4 to 4:3 - Selur - 15.06.2023

Here's what I did:
  • Started Hybrid
  • Loaded the source.
  • Looked at it. It has a SAR of 720x576 and a PAR of 1:1. Since 1:1 PAR is rather uncommon, I suspect that the content should be 1150/1053 (analog PAL with a DAR of 4:3).
  • Since the input is interlaced, but not flagged as interlaced, I checked whether it's tff or bff. tff has fuild motion when bobbed, so it's tff.
  • Additionally, I cropped the black bars, distortions.
With this I created: par_1150_1053.mp4 and par_1150_1053.mkv using x264 as format like you did in the debug output.
Muxing calls used were:
mkvmerge --ui-language en -o "G:\Output\2023-06-15@16_46_50_3010__03.mkv" --global-tags "G:\Output\mkvtags_2023-06-15@16_46_50_3010__03.xml" -d 0 --default-track 0:yes --default-duration "0:50/1fps" --aspect-ratio-factor 0:1150/1053 --fourcc 0:MP4V --no-chapters --compression -1:none --forced-track 0:yes --field-order 0:0 --no-audio --no-subtitles "G:\Output\2023-06-15@16_46_50_3010_02.264"
and
MP4Box -par 1=1150:1053 -add "G:\Output\2023-06-15@16_47_01_0110_02.264"#video:fps=50:name="":lang="" -brand avc1 -itags tool="Hybrid 2023.06.15.1" -tmp "G:\Output" -new "G:\Output\2023-06-15@16_47_01_0110__03.mp4"
both tell the muxer that the PAR should be 1150:1053.

For the mkv 'mediainfo --full' reports:
Width                                    : 692
Width                                    : 692 pixels
Height                                   : 568
Height                                   : 568 pixels
Stored_Width                             : 704
Stored_Height                            : 576
Sampled_Width                            : 692
Sampled_Height                           : 568
Pixel aspect ratio                       : 1.331
Original pixel aspect ratio              : 1.092
Display aspect ratio                     : 1.621
Display aspect ratio                     : 16:10
Original display aspect ratio            : 1.331
Original display aspect ratio            : 4:3
for the mp4 'mediainfo --full' reports:
Width                                    : 692
Width                                    : 692 pixels
Height                                   : 568
Height                                   : 568 pixels
Stored_Width                             : 704
Stored_Height                            : 576
Sampled_Width                            : 692
Sampled_Height                           : 568
Pixel aspect ratio                       : 1.092
Display aspect ratio                     : 1.329
Display aspect ratio                     : 4:3
Original display aspect ratio            : 1.331
Original display aspect ratio            : 4:3

So yes, something is amiss here.
=> I'll ask the author of mkvmerge about this. (https://forum.doom9.org/showthread.php?p=1988463#post1988463)

It seems to work fine if I use ffmpeg for muxing mkv files, to enabling 'Config->Containers->MKV->FFmpeg for .mkv muxing' should work as a workaround until I manage to figure out what is going wrong with mkvmerge.

Cu Selur

Ps.: I didn't notice this since I usually use PAR 1:1 output. Smile

RE: From 5:4 to 4:3 - Bartoloni - 15.06.2023

seems to me a regression because using an old MKVtoolNix (provided with your build of march) the issue is not happening.

P.S. the unflagged interlaced and the PAR 1:1 are coming from the default software of Blackmagic Intensity Pro ( media express ) i think a lot of other users in the world have similar files.

P.P.S.
Quote:I checked whether it's tff or bff. tff has fuild motion when bobbed, so it's tff.
this is a nice hint Smile thank you!

RE: From 5:4 to 4:3 - Selur - 15.06.2023

I think so, too. (+ I don't think I changed anything around the mkv muxing call, aside from ui-placement of some options.)

Cu Selur

RE: From 5:4 to 4:3 - Bartoloni - 19.06.2023

i saw that the issue is not reproducible Sad strange.. maybe is related to the specific clip?

RE: From 5:4 to 4:3 - Selur - 19.06.2023

There was some issue with the mkvmerge binary in Hybrid.
I'll create a new dev version and send you a link once I compiled, packed and uploaded it (~30min), maybe that fixes the problem for you too.

Cu Selur

RE: From 5:4 to 4:3 - Bartoloni - 19.06.2023

meanwhile i made some tests... and replacing the MKVmerge (and company) from official version of Hybrid to the latest dev i have .. make the MKV works fine..

RE: From 5:4 to 4:3 - Selur - 20.06.2023

Happy that worked out.

Cu Selur