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de-interlace filter
I read that when I use the de-interlace filter I should set the field to lower. Is this correct? Why?
Thanks. -
5 Replies
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To deinterlace correctly the plugin needs to know which field is first…so it asks…and since almost every full frame (720 x 480 or 486) video codec is lower field, that is the advice you were given. Lower field is also known as Bottom field, Even field or Second field.
Rich Rubasch
Tilt Media -
Rich, what do you mean “almost every full frame video codec is lower field”? I don’t have to understand this to do it correctly, I ask to safisfy my inner geek.
Victoria
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Right David. Also, worldwide, DV video is all lower field. Most, if not all, NTSC D1 codecs like Avid 2:1, 1:1, Media 100 codec, and others interlace lower field. PAL Motion JPEG codecs are upper field, I believe, except for the DV codecs. Years ago, the Abekas digital disc recorders were upper field first, or Odd fields, and always clashed with the lower field Avid codecs. Boy, those were the early days of Non linear!
Rich Rubasch
Tilt Media -
Thanks Rich and Dave. So the DV codec scans the lower field first, so when I de-interlace and tell it lower field first, it de-interlaces in that order and I get the frame image as it was captured. (I find it helpful to learn the “Why” behind the “What”.)
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PAL uncompressed codecs are upper (even) field first though…
nick
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