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Perenista · 19th July 2018, 21:18

I have a little problem with MKVToolnix: I used nPlayer to copy the 4K recorded video from my iPAD PRO 10.5 to another folder, so it was converted from MOV to MP4.

These are the details from the MP4 (now saved in my PC):

https://pastebin.com/GWRkfxyD

And as you can see the file is playing fine.

https://imgur.com/a/PRKWy0P

Now watch what happens when I add the MP4 to MKVToolnix and save as MKV:

https://imgur.com/a/uWTiCx5

Why? And how to avoid this?

It seems the iPAD is sending a command (embedded inside the MP4, of course) to MKVToolnix, to turn the image upside down. The funny thing is that everywhere I play this content it is not upside down. When added to MKVToolnix it changes to this.

Edit: now I spotted this in the file properties:

Rotation: 180°

What the hell?

19th July 2018, 21:18	#4 \| Link
Perenista Registered User Join Date: Oct 2013 Posts: 207	I have a little problem with MKVToolnix: I used nPlayer to copy the 4K recorded video from my iPAD PRO 10.5 to another folder, so it was converted from MOV to MP4. These are the details from the MP4 (now saved in my PC): https://pastebin.com/GWRkfxyD And as you can see the file is playing fine. https://imgur.com/a/PRKWy0P Now watch what happens when I add the MP4 to MKVToolnix and save as MKV: https://imgur.com/a/uWTiCx5 Why? And how to avoid this? It seems the iPAD is sending a command (embedded inside the MP4, of course) to MKVToolnix, to turn the image upside down. The funny thing is that everywhere I play this content it is not upside down. When added to MKVToolnix it changes to this. Edit: now I spotted this in the file properties: Rotation: 180° What the hell? Last edited by Perenista; 19th July 2018 at 21:20.