Matt Grunau
07-25-2005, 05:02 PM
When you open a clip in AE and it is interlaced, you put it into a composition and it effectivly "deinterlaces" the frame for quality purposes. But it is not truly deinterlacing it right? Anyone who ever used the deinterlacer in the Magic Bullet suite sould know what I mean. I thought it was just taking the lower field and doubling it for speed purposes, essentially making you lose half your quality (while working and previewing) When you output, unless you specify to output with interlaced frames again, are you actually outputting all the effects you have applied to only half of the original frame i.e doubling of all lower frames?
I have always liked that you could go through the Interpreate footage for a clip, change the settings from lower to upper to none and get differing results when viewing your footage, but was never really sure what happened to footage rendered. If the fields were replaced or simpply left out?
Does that make any sense?
Scottdvx100
07-25-2005, 08:26 PM
By telling AE that you have lower field dominant footage you're telling it to process each field separately and the fact there is a specific order. If you set the wrong field order you'll likely see jittering on the final results because the fields may be backwards. Most systems (DV included) are lower first. If you choose none you may find some loss in resolution depending on what you're doing.
Matt Grunau
07-25-2005, 09:13 PM
By telling AE that you have lower field dominant footage you're telling it to process each field separately and the fact there is a specific order. If you set the wrong field order you'll likely see jittering on the final results because the fields may be backwards. Most systems (DV included) are lower first. If you choose none you may find some loss in resolution depending on what you're doing.
Yes, but I guess I didn't frame (scuse the pun) my question better. If you take a video with a LOT of movement in it, something where you would clearly see the interlacing in say Premiere, and you open it in AE those interlaced lines disappear. I was under the impression this was done by AE just using one line doubling it for speedier purposes of editing, usually the lower field. And when you render, since you have the option of rendering with fields on, I assumed that if you did NOT output with frames on, you would be outputting exactly what was in the timeline, which was every lower framed simply doubled, therein effectively making renders half the full resolution.
why when you bring a piece of video that is interlaced does those lines dissapear when interpretted correctly?
Or, am I being an idoit and AE is doing exactly the deinterlacing which is why is often will not play at regular speeds, and oh dear God if thats the case then Scott, please hit me with a brick.
And I guess my last question would be, by default, is AE rendering in 30p, or as interlaced, and if so, why do you have the option of MAKING it render in fields (if that was not the default)?
I have a feeling I am making this much more diffcult and the answer is right there in front of me.