Hi
Quote:
Originally Posted by bobbytoad I wish I could understand the above quote or the thread as I had the same query in away?
In normal mode does the camera take 25 frames or 50 frames, which are interlaced (ie. half the lines are 1 frame and half the lines the next frame)???
In cinema mode the camera takes 25 frames? so is each frame then repeated twice to create a 50i stream? |
The Panasonic in progressive mode records 25 frames a second, but for compatibility with TVs and editing packages each frame is divided into 2 and is saved as 2 fields, so you get fields per second=50i, and it can be treated like any other 50i video source. This is part of a standard and is known as PSF or Progressive scan Segmented Frame.
On playback on a progressive TV such as LCD/Plasma, the TV de-interlaces 50i and in the process recognises it is a progressive sequence and recombines the two fields to give you a single frame back, it then repeats each frame twice to bring it back up to 50 frames per second which they run at, this is often referred to as 2:2 pull down. Recombining both fields gives you back the full resolution and while the TV displays 50 pictures a second, only 25 new pictures are shown giving you 25 frames a second and that film effect, and each frame is the full HD resolution.
A similar process happens with true interlaced video however as each field represents a different point in time they can't simply be combined, so all sorts of processing takes place to merge and blend the two fields to end up with 50 frames per second, so you get 50 pictures that are all slightly different conveying the movement, so you get smoother motion and that video look we are used to.
Hope that helps.
Regards
Phil