I need to transcode 720p AVC videos to Xvid because they need to be played on a Samsung DVD player. The player can handle maximum 448 pixel high videos and automatically scales the picture up to 1080p for the full HD TV. Now the question is, should I downscale to 448p for the highest theoretical resolution or 360p because it's exactly 1/4 of the source's and 1/9 of the TV's resolution?
2 Answers
Assuming the player can rescale the video to Full HD fast enough, I would output to the highest resolution acceptable.
I tried both and the empirical result is that the 360p video looks much better than the 448p. Even on my full HD computer screen played in VLC but on the TV screen it was definitely a lot better. So in my experience the proportionate imaging is more important than the theoretical resolution.