24P or 60i - Which is better? (GH2)

Started Dec 16, 2010 | Discussions thread
mpgxsvcd
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Re: When to use 60i, 60p, or 24p
In reply to Cy Cheze, Mar 4, 2011

This is a good synopsis. However, there are a few changes I would make.

NTSC 720p @ 60 FPS has the same affective frame rate(59.94 FPS) as deinterlaced 1080i yet it actually has more resolvable vertical resolution and a similar resolvable horizontal resolution to 1080i.

720p @ 60 FPS is fully supported by Blu-ray(AVC-HD Discs), ATSC broadcast Television, all editing programs, and by all streaming sites without any post processing. 1080i must be deinterlaced by all progressive displays which is essentially all televisions and monitors in use today.

http://www.avchd-info.org/format/index.html

There is no reason to ever use 1080i unless you are broadcasting your footage live and the television station requires it to be in 1080i. I doubt many of the people in this forum will ever do that.

1080p @ 24 FPS is actually recorded at 24 megabits per second and not at the 28 megabits per second of the 1080p @ 60 FPS camcorders.

Cy Cheze wrote:

1080 60i @ 17mps: When you want high resolution and full compatibility with Blu-ray. People who say it is worse than 30p or 24p are thinking only in terms of frame grabs. For purposes of motion, 60i beats either for smoothness and suppression of rolling shutter. It remains the base standard of most dedicated videocams for a good reason. 60p might beat them all, save for the lack of Blu-ray or on-line means to share the video as 60p.

720 60p @ 17mps: When you need smooth motion for action scenes or pans. The 60p almost eliminates any wobble due to rolling shutter. However, it cannot rescue smothness if your camera is shaky. This mode also extends effective lossless zoom range with the 300mm lens and ECT mode to about 1200mm, which is fantastic for video of wild animals, but practical only with a very firm tripod.

1080 24p @ 28mbps: For a wedding, funeral march, talking head, romantic scene, stationary scenery, or subject that involves limited motion and low light. Hollywood has used 24p since the 1920s, to save film use, because it is just above the flickery threshold, but not optimum for action video, and prone to wobble / jello, invisible football pass, or the famous "backward wagon wheels" effect. The bitrate of the GH2's 24p mode is very high, which is OK for Blu-ray, but takes more PC punch to edit, and is lost if one must then compress for on-line sharing.

Very likely, however, an unbiased viewer will not be able to tell the difference of identical scenes shot in the three modes. Or the viewer will be swayed more by cues, or by an urge to settle and dispose a boring and abstuse query, by whatever means, regardless of what is seen.

Eventually, 60p may become a universal standard, especially if it gives the manufacturers a means to hawk new hardware to the markets. Then 4k will come.

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