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You normally don’t have to worry about field processing. The video material goes
through the entire processing chain as fields and is exported again as fields or burned
onto DVD or shown on TV when played back on a DVD as a full picture. Only in
certain rare conditions is it necessary to go deeper into this process. Two problems
can occur:
1. Interlace artifacts
To be displayed on a computer monitor (during recording, in your TV/VCR, and in the
arranger during editing), the two fields must be combined to form a full screen.
These two fields are not the same, since two fields are created during the recording
between which a 1/50 of a second gap is evident. Moving objects can therefore
produce artifacts on vertical edges.
Typical interlacing errors
You can use so-called de-interlacing to avoid this type of artifact. De-interlacing places
a picture in between the two fields (interpolated). If you want to create stationary
pictures from movies, then you should definitely use a de-interlace filter.
In the system settings ("File" menu -> Program settings) you can set the preview
monitor display to use hardware de-interlacing during video recordings for the video
recorder and for display in the arranger.
2. Incorrect field rate
If you move around the series of fields in a movie data stream, then you will see strong
jitter and flicker effects. Picture objects move in a backward movement – two steps
forwards, one back – since a delayed field is shown before the previous one. This can
happen in the processing chain if you export video material improperly with the wrong
field order and then import it into different material. We use MXV or MPEG "Top field
first" format for all analog recordings ("odd" in other programs).
DV-AVI on the other hand is saved with “Bottom Field First”.
You can correct the field series for each video object in its object settings. See: "Menu
-> Effects -> Object properties"