mp4 plays on pc normal, but plays on tv sideways and upside down

[Ameristralian]

I had someone record some video on their phone for me and it plays fine on my laptop and my PC.

However I tried 3 different brands of TV and on all three the video shows up either sideways or upside down.

I have looked through all the user manuals and the on screen menus to no avail.

Any help would be great

Thanks

[jagabo]

Typically TV's don't pay attention to the rotation flag in the video header. You'll have to rotate and reencode for proper playback on TVs.

[netmask56]

Sadly so many people don't know the correct orientation of their phones when making videos as opposed to taking a still portrait shot. Often in news coverage where a citizen captures some exciting video with the phone held upright as if they were taking a portrait shot of Aunt Maude etc. Sideways is 16:9 like the TV screen and the Home button should be on the right otherwise you are likely to end up with an upside down image.

[johns0]

If you can upload a small sample of the raw video then we can see if it was encoded wrong and be fixed without re-encoding.

[Sharc]

.mp4 files include the rotation flag, but obviously not all players seem to read it. My Samsung TV does fortunately, but when I remux the .mp4 file to .mkv in order to convert VFR to CFR the rotation information is lost. At the end I have to resize and re-enocode, unfortunately.
Even when one films with mobile phones in landscape mode there is still the chance that the picture is flipped upside down.

[netmask56]

Only if the phone has the start or home button on the left instead of where it should be on the right. iPhones and Android.