How to remove the Original DAR?

[Desz5]

I have made a remux of a tvshow with MakeMKV and the aspect ratio should be 4:3.
When opening the file it plays the content at 16:9.
Mediainfo shows this info:

Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

I would like to remove the Original Display Aspect Ratio from the .mkv and keep the MPEG2 Video.
If tried
*DVDPatcher
*MKVToolnix - Set aspect ratio to 4:3
*FFMPEG - Set aspect ratio
*IfoEdit
*CleverFFMpeg-GUI


I have the VIDEO_TS folder, how can i edit the files before using MakeMKV to rip the DVD and only keep the DAR?
Thanks!

[manono]

Use PGCEdit on the original DVD.

[jagabo]

DVDPatcher can change the MPEG AR flags. But you'll have to demux the MPEG 2 stream to an M2V container, patch that new file, then remux to MKV.

ffmpeg can do it directly with the MKV file using the mpeg2 bitstream filter:

ffmpeg -i input.mkv -c copy -bsf:v mpeg2_metadata=display_aspect_ratio=4/3 -aspect 4:3 output.mkv

That also sets the container level AR to 4:3.

A drag/drop batch file:

ffmpeg -i "%~dpnx1" -map 0 -c copy -bsf:v mpeg2_metadata=display_aspect_ratio=4/3 -aspect 4:3 "%~dpn1_AR4.3.mvk"
pause

[Desz5]

Thanks jagabo for the script.
It display correctly now but the Original display aspect ratio is still 16:9 when opening with Mediainfo.
Is it possible to remove that line from the .mkv maybe even hexedit?

[ProWo]

I have made a remux of a tvshow with MakeMKV and the aspect ratio should be 4:3.
When opening the file it plays the content at 16:9.
Mediainfo shows this info:

Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

I would like to remove the Original Display Aspect Ratio from the .mkv and keep the MPEG2 Video.
If tried
*DVDPatcher
*MKVToolnix - Set aspect ratio to 4:3
*FFMPEG - Set aspect ratio
*IfoEdit
*CleverFFMpeg-GUI

Can be done with clever FFmpeg-GUI.
Load your mkv, click main page, click extract streams.
Click extract, answer the question for the videostream with raw.
Click multiplex, deselect the source streams (the blue one) on the left and click multiplex.
Done.

[Desz5]

It works great using your steps and clever FFmpeg-GUI.
When i leave everything and don't edit the DAR to 1.33 i only get:

Display aspect ratio                     : 16:9

Removing the Original DAR line like i want.

Changing the DAR to 1.33 gives back

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

Using clever FFmpeg-GUI and then using jagabo script to change the aspect ratio to 4:3 leaves me with the same result.
Both lines are back.
How can i change the DAR with clever FFmpeg-GUI and keep that 1 line?

[ProWo]

Change the DAR with clever Ffmpeg-GUI (main page, various).
Then repeat the steps from my post above with the new file.

[Desz5]

When changing the DAR with clever Ffmpeg-GUI (main page, various) it shows Current DAR: 1.33 reading the DAR from the file source not the Original DAR.
So when selecting Container & stream (or Stream or Container) the file doesn't output a different file.
Still:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

So:
main page, various, Change DAR: Shows DAR (1.33)
main page, extract streams, raw, multiplex: Shows Source DAR: (1.78)

[ProWo]

When changing the DAR with clever Ffmpeg-GUI (main page, various) it shows Current DAR: 1.33 reading the DAR from the file source not the Original DAR.
So when selecting Container & stream (or Stream or Container) the file doesn't output a different file.
Still:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

I don't understand what you want.
Is your mkv, where you want to get rid of the original tag, now 4:3 or 16:9?

[Desz5]

It should only show the line: Display aspect ratio : 4:3
and remove the line Original display aspect ratio : 16:9

the original tag shows : 16:9

[ProWo]

It should only show the line: Display aspect ratio : 4:3
and remove the line Original display aspect ratio : 16:9

the original tag shows : 16:9

Then do the steps from my post#5 with this file.

[Desz5]

My original file shows:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

I would like to remove the Original display aspect ratio : 16:9 and keep the Display aspect ratio : 4:3.
Like this:

Display aspect ratio                     : 4:3

When using your steps from post #5 my new file shows:

Display aspect ratio : 16:9

Which is wrong because it must be 4:3.
Changing the DAR AFTER that causes the both lines to reappear:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

Changing the DAR BEFORE the steps from post#5 gives me the same results.

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

What am i doing wrong?
Am i selecting the sources wrong in the Multiplex screen?
I'm sorry if i'm not explaining it right.

[ProWo]

My original file shows:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

What am i doing wrong?

Load this file (with the two values above) in clever FFmpeg-GUI.
Click main page, click various, click change DAR.
The field "New DAR" should show you 1.33.
Click change.
Check the new created file with mediainfo.
It should show you now:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 4:3

Load this new file in clever FFmpeg-GUI.
Click main page, click extract streams, click extract, answer the question for the videostream with raw stream.

Click multiplex, deselect the source streams (the blue one) on the left, leave the green streams selected, set mkv as container, click multiplex.
Done.

This new file should show you:

Display aspect ratio                     : 4:3

[Desz5]

Load this file (with the two values above) in clever FFmpeg-GUI. - Done
Click main page, click various, click change DAR. - Done
The field "New DAR" should show you 1.33. - Correct
Click change. - Done
Check the new created file with mediainfo. = filename_DAR_1.33.mkv
It should show you now:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 4:3

No i get:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

[ProWo]

No i get:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

I have no idea why we get different results.
What is your ffmpeg version?

Test this sample file with the steps from post #14.
It should have the same two aspect ratio values as your video.

[Desz5]

The sample file indeed changes it to:

Display aspect ratio                     : 4:3
Original display aspect ratio            : 4:3

ffmpeg version: 7.1.1-full_build.

I don't know why it doesn't work with my file...it's extracted from the DVD with MakeMKV without errors.

[ProWo]

Repost a mediainfo report (text mode) from your file.

[Desz5]

General
Unique ID                                : 325803599282427629056782191202976623856 (0xF51B7DA41133A76E2B421776B7DB6CF0)
Complete name                            : C:\Users\user\Downloads\clever_ffmpeg_gui_342\1.mkv
Format                                   : Matroska
Format version                           : Version 2
File size                                : 1.30 GiB
Duration                                 : 23 min 0 s
Overall bit rate mode                    : Variable
Overall bit rate                         : 8 072 kb/s
Frame rate                               : 25.000 FPS
Encoded date                             : 2025-04-14 20:09:38 UTC
Writing application                      : MakeMKV v1.18.1 win(x64-release)
Writing library                          : libmakemkv v1.18.1 (1.3.10/1.5.2) win(x64-release)

Video
ID                                       : 1
ID in the original source medium         : 224 (0xE0)
Format                                   : MPEG Video
Format version                           : Version 2
Format profile                           : Main@Main
Format settings                          : CustomMatrix / BVOP
Format settings, BVOP                    : Yes
Format settings, Matrix                  : Custom
Format settings, GOP                     : Variable
Format settings, picture structure       : Frame
Codec ID                                 : V_MPEG2
Codec ID/Info                            : MPEG 1 or 2 Video
Duration                                 : 23 min 0 s
Bit rate mode                            : Variable
Bit rate                                 : 7 843 kb/s
Maximum bit rate                         : 8 000 kb/s
Width                                    : 720 pixels
Height                                   : 576 pixels
Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9
Frame rate mode                          : Constant
Frame rate                               : 25.000 FPS
Standard                                 : PAL
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Scan type                                : Interlaced
Scan order                               : Top Field First
Compression mode                         : Lossy
Bits/(Pixel*Frame)                       : 0.756
Time code of first frame                 : 00:02:30:00
Time code source                         : Group of pictures header
GOP, Open/Closed                         : Open
Stream size                              : 1.26 GiB (97%)
Language                                 : English
Default                                  : No
Forced                                   : No
Original source medium                   : DVD-Video

Audio
ID                                       : 2
ID in the original source medium         : 189 (0xBD)128 (0x80)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : A_AC3
Duration                                 : 23 min 0 s
Bit rate mode                            : Constant
Bit rate                                 : 224 kb/s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Stream size                              : 36.8 MiB (3%)
Title                                    : Stereo
Language                                 : English
Service kind                             : Complete Main
Default                                  : Yes
Forced                                   : No
Original source medium                   : DVD-Video
Dialog Normalization                     : -31 dB
compr                                    : 1.49 dB
dialnorm_Average                         : -31 dB
dialnorm_Minimum                         : -31 dB
dialnorm_Maximum                         : -31 dB

Menu
00:00:00.000                             : en:Chapter 01
00:01:27.920                             : en:Chapter 02
00:05:00.200                             : en:Chapter 03
00:10:00.200                             : en:Chapter 04
00:15:00.320                             : en:Chapter 05
00:20:00.440                             : en:Chapter 06
00:22:58.880                             : en:Chapter 07

[ProWo]

If you use your 1.mkv with the steps in post #14 you get

Display aspect ratio                     : 4:3
Original display aspect ratio            : 16:9

?

[Desz5]

Right.

[ProWo]

Right.

Then I'm out, sorry. I have no further ideas.

[Desz5]

Can i upload a sample for you to check?

[ProWo]

Can i upload a sample for you to check?

Yes, of course.

[Desz5]

Here's a sample i created with ffmpeg, thank you.