[IMPOSSIBLE] Canon 1100d 1080p

Started by RevinFilms, December 18, 2012, 03:55:43 PM

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RevinFilms

It is possible to record 1080p video from Canon 1100d?
1100D

nanomad

Maybe, but researching it properly requires a big amount of time and a deeper understanding on how the sensor readout works.
It's on my to do list but also on hold at least until I'm done with the 650D
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

RevinFilms

Ok. But when a stable version for 1100D will come out? Im so curious about all those cool features. Keep the good work. Thanks.
1100D

nanomad

the port is already pretty much stable. Download a nightly build and give it a try
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5

d0g

5 years later ... is 1080 possible on an 1100D? (T3)

Levas

Nope.
It has not enough megapixels for 1080.

For video canon uses pixelbinning en line skipping. Horizontally it combines every 3 pixels from the same color and vertically it reads a line, skips 2 lines again and again.
Some explanation with pictures:
http://www.magiclantern.fm/forum/index.php?topic=16516.0

For this method it needs 3 times the amount of pixels for a certain video resolution.
Full HD is 1920 pixels wide, 1920 x 3 is 5760 pixels, so for full HD you want a sensor that is 5760 pixels wide. Canon uses sensors in 3:2 aspect ratio.
So this sensor needs a vertical resolution of 5760 / 3 x 2 = 3840 pixels.
So for perfect (Canon DSLR type) Full HD you want a 5760 x 3840 = 22.1 Megapixel sensor.
And it is not a coincidence that the Canon 5dIII has exactly that resolution  ;D

The 1100D has a horizontal resolution of 4272 pixels. 4272 / 3 = 1424 pixels for video resolution.
Aspect ratio of video is 16:9 so the 1100D should be capable of recording 1424 x 801 pixel resolution. Which is downscaled by Canon to the more common video resolution  1280 x 720.

There are a lot of 18 megapixel Canon camera's that shoot full HD, but it actually is upscaled a little, they shoot about 1728 x 972 resolution video, which is upscaled in camera to 1920 x 1080.

For more info on which cam can do what:
http://builds.magiclantern.fm/features.html

d0g

Quote from: Levas on August 25, 2017, 07:25:01 PM
Nope.
It has not enough megapixels for 1080...

I see, thank you for that excellent explanation. Bummer!