480i/30p interlace or progresive ?

[mochouinard]

I recorded footage in 480i/30p and the compagny we hired charged me extra because I recorded my footage in interlace.

Is it interlace or not ? Is it 60intelace frame, so 2 interlace frame create 1 progresive frame ?

 

[scharky]

30p is indeed progressive. Why would they charge you extra for shooting in interlace?
You can tell them though, that 30P is indeed 30 individual progressive frames.

 

[Barry_Green]

The codec is interlaced. The footage was acquired progressive. Each progressive frame gets split into fields for recording. But the imager runs at 30 progressive frames per second, and the footage is genuine 30p.

DV, DVCPRO, and DVCPRO50 are all interlaced recording systems. So to get progressive-scan imagery recorded in them, it always needs to be split into fields. The 480i/30p recording system works exactly the same way Sony's HDCAM PsF system works.