7D and the nanoFlash...works...but...

Elton

Elton

Veteran
It's quite a center crop, which does get you about 1280x720 to extract, but you would have to do pulldown removal in post with any 24p recording, because it outputs in a 1080i stream. I'm not sure if it's worth the trouble at all, although you can visibly see a little better color saturation with the HDMI recording. (100 mbs long GOP on the nano is the mode I used)

About 720 60p: It still aliases like crazy. Horrid in anything wide and sharp with thin diagonals. (I shot city street scenes with power lines from a light rail car to test the problem, and yes, it's hideous.

1080 24p: Very nice. It looks great, might even have slightly better RS characteristics than the 5D 30p.

Btw, I would like to post full rez stills, but it seems the upload capability on the site has been changed to the pictures and albums thing, which limits the size of the image. Will post a link later

Edit: I put some grabs up on my mobile me album thing. Full rez files grabs can be downloaded here: http://gallery.me.com/mrbarlowelton/100085

Note--It turns out that once you plug in the HDMI, the live view on the LCD of the camera is diabled, so I shot these literally blind. (didn't have an HDMI monitor on hand) I put on a Zeiss 18mm, and stopped down the lens probably too much and focused to infinity. Just wanted to grab some images to look at before I left for home.

Shot with the neutral picture style with sharpening turned all the way down.

HDMI
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Native recording:
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HDMI
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Native recording:
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A few more...

720p Aliasing, native recording
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720p HDMI (output as 1080i--ugh)
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Curiously, the image is larger via HDMI when not recording internally, but you do get that center box, which I'm not sure is defeatable.
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Wow....thanks. If we could get rid of that focusing square when not recording then I think it wsould be worth the capture. It still might be with that 720p crop. I would love to see if there would be a difference in detail/sharpness when compared to a full 1920x1080 compressed version.
 
Can you just move the box to the lower corner and use the top part of the image? ...If it's worth it.
 
Yeah. Just move the box out of the way as far as you can.

Great info, though, Elton. Doesn't look like it's worth it at all.
 
Ian-T said:
Wow....thanks. If we could get rid of that focusing square when not recording then I think it wsould be worth the capture. It still might be with that 720p crop. I would love to see if there would be a difference in detail/sharpness when compared to a full 1920x1080 compressed version.
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I look at it and say "meh". The 720 is seriously flawed and the 1080 would be a PITA via HDMI unless that box can be removed. I'm not even sure how long live view can run before shutting off (given that you're not actually engaging recording on the camera)

The image is a tad nicer via HDMI but I don't think it's worth the trouble unless it's uncluttered. If Hudson can hack this baby then wonderful, but for now I just think its 1080 24p is nice and to stop worrying and take advantage of what it does right.
 
Elton said:
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The image is a tad nicer via HDMI but I don't think it's worth the trouble unless it's uncluttered. If Hudson can hack this baby then wonderful, but for now I just think its 1080 24p is nice and to stop worrying and take advantage of what it does right.
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Thank you, Elton. That's exactly what I think.
 
sunburst said:
are both signals 4-2-0?
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I'm pretty sure the live HDMI, whether recording internally or not, is actual uncompressed 4:2:2, but so much of the 1080 image is wasted due to a 4:3 crop, so you have to ask whether more color sampling in a lower resolution image is worth the hassle of workarounds.

I say no.
 
Elton said:
I'm pretty sure the live HDMI, whether recording internally or not, is actual uncompressed 4:2:2, but so much of the 1080 image is wasted due to a 4:3 crop, so you have to ask whether more color sampling in a lower resolution image is worth the hassle of workarounds.

I say no.
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its all good. this is SOCLOSE that someones gonna exploit it. great news
 
If it's uncompressed 4-2-2 it will be good for low light shooting with anamorphic lenses. Also it wouldn't be a huge leap for canon to enable uncompressed 1080p out in future DSLRs. R.I.P RED.
 
Ok, I guess hitting the info button until all the clutter was eliminated from the LCD except the record button in the upper right corner. This is a little more promising.

HDMI was recorded at 160 mbs long GOP on the nano. Compare that to the camera recording below it.

HDMI:
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Internal H264:
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there you go!!!!

99% there.

I wonder if black magic intensity will find a way to hook up, and
eliminate the red dot.

or else just film a feature with that as your smiley corner bug :happy:
 
Don't know if this applies to the HDMI output, but when I change the auto-focus mode to "AF :)" the focus box disappears on the lcd even when I'm not recording..
 
Perhaps we can also get rid of that gray letterbox and get a full 4:3 frame by being in photo mode and pressing the "start/stop" button to turn on the video. Unfortunately I don't have a mini-HDMI to test any of this, but it all works with the included composite cable..
 
squig said:
If it's uncompressed 4-2-2 it will be good for low light shooting with anamorphic lenses. Also it wouldn't be a huge leap for canon to enable uncompressed 1080p out in future DSLRs. R.I.P RED.
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not yet! just fix the minor aliasing issues.. then we can declare it
 
Well, just got my mini-HDMI to HDMI cable and I can confirm that it is possible to get the "almost full screen" output as pictured in Elton's last post WITHOUT the record icon, by simply being in "AF :)" mode, which disables the autofocus square overlay and means you don't have to be in record mode to get full screen output.

This also means that using a device such as the nanoFlash would defeat the 12 min. record limit!

Also potentially useful is the fact that if you switch out of video mode and into photo mode, then activate live view with the "start/stop" button, the gray letterbox overlay disappears, giving you and even larger, and almost full 1080P viewing area. Now, since the camera is simulating exposure for a still photo, I don't know to which extend it is possible to fully control the camera (it seems to either be in 1080P 30fps or 1080i 60fps when in this mode), but with a bit of investigating, that extra resolution could probably be put to good use.

With all the recent "7D meet the x" threads, I wonder how the camera stacks up in uncompressed mode, especially in high detail (such as foliage) scenes...
 
Thanks for the info polr.

What you did when switching over to Still mode is basically the same discovery I had with my HV20. When switching to still mode I was able to use the entire sensor and capture an uncompressed video image over firewire (using HDVSplit) at 30p 1920x1080 and a pilar boxed 2535x1550 (and we all know the HV20 can not do 30p). I was also able to access all of the manual functions (most of them at least). I expect the 7D to do better coming out of HDMI.
 
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