which is better, the option frame based or upper field?

[jose]

Hi over there... i do need help with this....its that i need exactly to now which option is the best upper field or frame based. i think it´s upper field but i dont really know what mean each one of them. so pls if u could help me. pls dont forget to explain the diferences. thank you

[Ron P.]

Hi Jose, and welcome to the forums..

There is not a best answer to your question. This is dependant on what your final goal is for your project, and if you are editing images or video clips.

Field based is used for video clips. Video clips are made up of Frames. The frames are made up of 2 fields (Upper and Lower). The order in which they are displayed on a television is the Field Order. So the television will display either the lower field first, then display the upper field of each frame, or vice-versa. That's a short abbreviated description, for more information just do some searching on the forums, or google.

Frame based is used for video that is intended to be viewed on a PC, or in some cases LCD televisions that do not use interlacing. It is also used for video clips that will only contain images (photographs). Since a photo is static, non-animated, and does not have Field information, they are best displayed as the entire Frame, not the lower or upper half first.

Now what you really need to know is that most Digital clips are Lower Field First, and most Analogue clips are captured to Upper Field First. Getting these reversed can result in your video appearing jittery.

Ron P.

[skier-hughes]

Excellent answer Ron.

[jose]

ok man...thank you a lot.