*Thanx for great help, guys.
*Is there any reason to film in 50i and convert to 25p in *post if I can film in 25p. Or rather – is there a difference?
Most camcorders don’t save in progressive format. Most use interlaced dv footage, interlaced mpeg2 footage. Some semi-progressive camcorders support reverse 3:2 pulldown which takes the interlaced 29.97 fps and turns it into 23.976p which is 24 fps 1% slower, just like why recording hollywood movies the sound is at 30 fps to 29.97 so when post house puts edl ref editing picture on dv tape, it gets slowed down too. Then everything matches.
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50i is like our 60i
50i to 25p deinterlaced
and 60i to 30p but you don’t have to worry about 30p to 24p temporal.
All you have to do is take 25p and slow it down 4% to 24p; audio too.
If there is a 25p digital camera, then try to find one that is true progressive, not interlaced and doesn’t use mpeg2 4:2:0. Recovering p from i can sometimes create problems. Temporally, excluding any blur or artifacts, true p always seems to look better. A prime example is panasonic’s dvx100. It may, in post-editing, finally get to 24p, but the distance a person travels compared to the recording frame is never constant. That is why when there is small motion, it still looks like a soap opera and fast motion it gets weird. There’s no true constant interval. Only film has a constant interval of time and space. That is why blur looks so good in film. Hopefully an exception is coming out soon, the red dot camera that shoots RAW 24 fps; a bunch of still camera pics mushed together.