Copy not playing

I have made some dvd backup on dvd-r that play on my home dvd tokay
But don’t play on my new panasonic home dvd
I have tried to backup on dvd±r(rw), always the same result
With a dvd-r it play the menu and after a while it freeze
This come from the quality of the blank dvd or from the soft used for transcoding or anything else ?
thx for all your help

The first suspect is usually low quality media.

Use DVDInfoPro to obtain the media information aka media code and post back.

Do you know that the panasonic supports dvd-r media?

Check out your model number here:

http://www.dvdrhelp.com/dvdplayers.php

That will tell you what media it supports…

thx for your reply, i try some thing