LG - PHOTOS jpg - bad aspect ratio

[jcdole]

Now its seems to work ! But why ?

OLD Story before 2 years ago
4 pcs
3 linux Leap 15.0 opensuse running minidnla
1 win10 running PS3 Media Server 1.90.1
1 TV SONY
Test was successful to view pictures, but not use after test.

New story (this week) :
4 pcs
3 linux Leap 15.1 opensuse running minidnla
1 win10 running UMS 9.4.2 --> don't change any initial parameters
1 TV LG 43UK6400PLF logiclel version 05.10.45 // WEBOS version 4.1.4-5727

No problem viewing photos (3024x4032) jpg from linux ( after downgrading to previous version of dlna 1.2.1.10.11 )

Viewing photos on the pc running UMS 9.4.2 on windows 10
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Chapter one : The aspect ratio is bad : the people appear to be wider than reality.
Chapter two : uninstall UMS 9.4.2 and reinstall PS3 Media Server 1.90.1. : --> Many photos cannot be loaded on the tv.
Chapter three : Reset TV to factory, Set TV parameters as before (as far as i know) - Remove PS3 and reinstall UMS 9.4.2 --> don't change any initial parameters but create an renderer config file by clicking on the television on the status windows ( [LG] WebOs TV UK6400PLF 192.168.130.106 ). Don't do any things on that file.

Now the picture have good ratio.

PS : I know nothing aboot dnla. I can just follow tuto's to install this kind of software.

Any comments are welcome.
Ask for any more information.