[Jambrosky]

I know its important to deinterlace a video project when it is going to be viewed on a monitor but I am also told to deinterlace 'still images' when they are going to be viewed on a t.v. Is it always better to deinterlace an entire video or will this make the video clips' (that are not 'still images') quality poor for t.v. viewing?

[loki74]

the reason you want to deinterlace when viewing on a monitor is because interlacing was meant for TV -- back when TV first came out, they could only "paint" every other line on the screen. Monitors, and modern TVs as well, are capable of drawing much faster. The still image will have the same thing painted consantly, so interlacing will be visible, and unnecessary.

I cant say for sure, but deinterlacing should not affect how it is viewed on TVs, unless you go to something other than 30fps (or some multiple of that-60fps). The 30fps has to do with the electricity going into the TV. I think that 30p is alright on TV, as are 60i and 60p. The traditional film 24p will not, however.

So if you recorded in 24p with a 2:3 pulldown to 30i thats the best video quality I think you can get. If you recorded 24p with a 2:3:3:2 pulldown to 30i, then I would suggest going back to 24p and then using 2:3 to get to the TV compatable 30i framerate.

If you recorded at 60i, I think its possible to go to 30p, which will work on TVs. Progressive is always better than interlaced.

You might want to wait to get some more replies though, I'm still learning this stuff and my understanding may not be fully accurate.

Good luck!

[dlefebvre]

There is no need to deinterlace still image, because there is nothing to deinterlace.
A video frame is is made of 2 separate fields, one made of odd lines (1, 3, 5, 7, etc) and one made of even lines (2,, 4, 6, 8, etc). They are then interlaced together in a single frame. So each field is captured every 1/60th of a second. (hence 30 frames per second or 60 fields per seconds. In PAL it's the same thing but 25 frames and 50 fields.

Still picture are stills, so they don't have fileds. unles there are captures from a video stream.

For more info check out How stuff works

[barang]

Originally Posted by dlefebvre

There is no need to deinterlace still image, because there is nothing to deinterlace.
A video frame is is made of 2 separate fields, one made of odd lines (1, 3, 5, 7, etc) and one made of even lines (2,, 4, 6, 8, etc). They are then interlaced together in a single frame. So each field is captured every 1/60th of a second. (hence 30 frames per second or 60 fields per seconds. In PAL it's the same thing but 25 frames and 50 fields.

Still picture are stills, so they don't have fileds. unles there are captures from a video stream.

For more info check out How stuff works

Still images captured from moving DV will still need to be deinterlaced, I think.

[dlefebvre]

Originally Posted by barang

Still images captured from moving DV will still need to be deinterlaced, I think.

That's what I meant by video stream. I should have called it a freeze frame.

When I say still I mean graphic file. (tga, jpeg, tiff, etc)

[Jambrosky]

alright, thanks a lot. I am using a mini dv camera so i think i do have to deinterlace freeze frames. again, thank you.