Reencode needed?

i have bunch of dvds legally own , encoded handbrake using atv2 setting play on atv2.

came across , atv 1st gen play these movies on. guessing due frame rate differences have reencode these atv1 yes?

if so, need start original source or can use atv2 encodes source convert using handbrakes apple tv setting?

 

for highest quality should go original dvds. but, if aren't picky, i'd go rips you've got. couple see how look. if need better, grab dvds.

 

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