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Messages - EOS4K

#1
Quote from: CFP on June 20, 2013, 05:19:48 PM
Yes that is how it works.

The RAW videos and silent pics are the images that are read from the sensor for the LiveView preview.

The max resolutions depend on the sensor resolution. My EOS 600D's sensor has a resolution of 5202 X 3465. The higest resolution that's possible for RAW is 1734 X 1155. That's because Canon doesn't read the full sensor and scales it to what ever we want but skips lines and columns to create their desired resolution. In the 600D's case, it skips every third line and column (5202 / 3 = 1734 & 3465 / 3 = 1155) to get a resolution that is close to full HD (1920 X 1080) in terms of width. So it can be used to create full HD H.264 videos.

Only if the developers would find a way to set the lines & columns skipping, higher resolutions might be possible on the 5D Mark III in 1X mode.
But it doesn't look like that is possible.

Thank you, CFP! I really appreciate your astute explanation for the current limitations with RAW HD videos from Canon EOS DSLRs. The 5D Mk III has a maximum sensor resolution of 5760 x 3840. 5760/3 = 1920. What a fabulous coincidence! Other sensors simply don't have such a perfect pixel count.
#2
Quote from: brapodam on June 16, 2013, 08:35:10 AM
I think they pull the RAW image from the live view buffer or something (at least that's how the 14 bit DNG silent pics work), so the max we can get is the live view resolution, which depends on your camera.

Is THAT how it works? :o

The 5D Mk III has an LCD resolution of 1.04 dots (read 720x480 pixels). How are people producing RAW video in 1080p and even 2.5K from a Live View screen with DVD resolution? Perhaps I'm missing something here. In any case, I don't see why 4K would be impossible, seeing that 2.5K has already been demonstrated.

Any clarification would be greatly appreciated!
#3
Is it possible to record 4K video at 1fps using the new Magic Lantern RAW video hack? Wouldn't 1fps eliminate the need to sacrifice resolution (due to limited data transfer speeds) in RAW video mode?

Is there a reason this sample video was shot at 1872x1250 and not 2048x1080 or 3840x2160?


Thanks!