What are four square pixel?
-1:1 For Square Pixels
-4:3 For Standard TV
-16:9 For Wide Screen TV
Answer:
The term "square pixel" refers to the 'logical' pixel aspect ratio (PAR) as opposed to the more familiar frame aspect ratio. Square pixels generally represent the ideal pixel aspect ratio however they are not very common in (ITU Rec. BT.601) digital video.
Improperly matched PARs will result in greater processing overhead in comparison to properly matched PARs and could result in picture quality problems with some digital displays. Likewise if you choose an improper PAR you will likely notice geometric distortion in your video image.
The PAR encoding option you choose will depend on the PAR of the original video as well as the PAR of the display that you intend to use for viewing the video. In other words, the best choice in most cases is to preserve the PAR of the original video, i.e. if video source uses a non-square PAR then you should use a non-square PAR for encoding, likewise if the original video source uses a square PAR then you should use a square PAR for encoding video.
never heard of square pixel but i would guess its for a perfect square tv that you would be using. The most common tv's are wider (4 units) than they are tall (3 units). If you will be using a standard television to play your DVDs i would reccommend the standard 4:3: ratio. Dont mess with the 1:1 because i my experience tells me your video will be squished making everyone look tall and skinny.
1:1 probably means that the original aspect ratio remains unchanged in the final DVD,
4:3, means that the original video will be scaled to fit a 4:3 aspect ratio, example 704x480.
16:9 means the original video will be scaled to fit a 16:9 aspect ratio
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