1080i/24p at midnight

T

Thomas Lew

Well-known member
Took some footage at midnight around campus. My favorite shot is of the car in the parking lot approaching.

Shot in 1080/24p. FCP Pro Res 422 to transcode. Didn't do anything to the footage (no color correcting or anything at all).

http://www.vimeo.com/1838192
 
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was there any gain on this? i see a little bit of noise but it may be due to compression. but it simply looks amazing. i think i'm sold on this camera.
 
Looks good sharp and well handled low lights though there was a bit of stagger on the pans. Not sure if this is a compression issue or a recording one still looks very good.
 
Whoa... that looks REALLY good. Surprisingly good. I had NO idea it would hold up that well to the low light conditions. I haven't seriously thought about this camera, but in the event business, this could come in REALLY handy.

Man oh man, now I have to consider picking up a couple of these, and I really can't afford it at the moment. Thanks a lot Thomas:zombie_smiley:
:beer:
 
1080i/24p
Click to expand...

I don't want to nit-pick, but you can't be interlaced and progressive at the same time. I assume that you meant to say, "1080/24p" or you could say, "1080p/24".

It would be interesting to know the gain setting and the shutter speed.

Very interesting... and impressive.

Bob Diaz
 
BobDiaz said:
I don't want to nit-pick, but you can't be interlaced and progressive at the same time. I assume that you meant to say, "1080/24p" or you could say, "1080p/24".

It would be interesting to know the gain setting and the shutter speed.

Very interesting... and impressive.

Bob Diaz
Click to expand...

honestly I thought everything 1080 always had an i after it..... (dang I'm stupid). What does the 1080 mean in 1080/24p?
 
In high definition, 1080 is the number of pixels recorded in the vertical direction. High definition comes in two flavors of resolution - 1280x720, and 1920x1080. So something recorded in 1920x1080 is 1920 pixels wide by 1080 pixels high, but everybody calls it 1080 for short. The "i" and "p" stand for "interlaced" and "progressive". Each frame of interlaced footage is recorded in two separte fields, one field composed of all the odd rows of pixels and the other composed of all the even rows of pixels, that are interlaced to create an image. Progressive footage is captured frame by frame like a series of stills shown one right after the other. So:

1080/24p = 1920x1080 footage collected at 24 frames per second in a progressive format

720/30p = 1280x720 footage collected at 30 frames per second in a progressive format

etc.



Hope that helps a little.
 
Wow... that's some beautiful footage right there. I was dismissing this cam (not 100%) because of the AVCHD codec, but I think this has changed my mind. I'd still like to get the 170 though, but this footage rocks!
 
Think I'm sold, now if someone can just tell me how this compares to the amazing canon a1 in terms of codec, sharpness, and tweakabilty, and last but not least, overall resolution?
 
Hi Thomas,

Several have answered, but let me say a bit more...

In some modes there are 2 different ways to scan the image; interlaced and progressive.

With Progressive all the rows or scan lines are covered in a single pass. 1,2,3,4,5, ...

With Interlaced, first all the odd numbered lines are covered: 1,3,5,7,9, ... On the second pass, all the odd scan lines are covered: 2, 4, 6, 8, 10, ... On a 60i system, each pass is 1/60 of a second. So, from the first pass to the second pass, things have moved 1/60 of a second forward. Now, if nothing moves, the image comes together normal, BUT if things move, every other line is offset a bit when the 2 passes or fields are put together.

Interlaced_1.png

In the photo above, the bike rider has moved from the first pass (field) to the second field. Look closely at the tires.

Interlaced_2.png

This is the same image but with a 2x zoom to make the scan lines stand out even more.

IMHO Interlaced video sucks big time. Both slow motion and freeze frames suffer badly by using interlaced video. With static objects, people see the 1080i resolution as is it were 1920x720P. When things move, the resolution is like 1920x540p.

The good news is that the HMC-150 is NOT locked into 1080i video, you can select 30p and 24p for 1080 modes. In that case, the 1080 video is shot progressive and the problem you see in the photos I've posted does not happen.

720p is ALWAYS progressive.

If you're interested, I've covered the issue of interlaced / progressive in my Podcasts: (See DTV and 1080i or720p?)

http://web.mac.com/bobdiaz/Site/Podcast/Podcast.html


Bob Diaz
 
Kyle, The musician, and especially Bobdiaz thanks for the help =]

I had an idea of what it all was just never really understood it entirely but I do now thanks a ton.
 
BobDiaz said:
....

With Progressive all the rows or scan lines are covered in a single pass. 1,2,3,4,5, ...

With Interlaced, first all the odd numbered lines are covered: 1,3,5,7,9, ... On the second pass, all the odd scan lines are covered: 2, 4, 6, 8, 10, ... On a 60i system, each pass is 1/60 of a second. ....
Click to expand...


Souldn't that be even?
 
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