Getting RAW Video

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Re: Getting RAW Video

Postby astronomer » Mon Jun 01, 2015 8:27 pm

Brian Wake wrote:So is possibbly the raw video in a nikon D5100 ?
Already exist ?


Leegong was able to get RAW liveview steam into card but that will necessarily redirect the data path in image processor to SD. As a consequence, you'll lose all the screen display and exposure control.
It's very difficult to figure out how to activate both data path due to lack of hardware documentation. And there's no existing debugging code inside the ROM like Canon. It's guesswork now.
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Re: Getting RAW Video

Postby jdmueller » Tue Jun 02, 2015 9:02 am

So does this mean it could be possible to get 4K video from my camera such as a Nikon D3200 some day?
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Re: Getting RAW Video

Postby Simeon » Tue Jun 02, 2015 4:39 pm

jdmueller wrote:So does this mean it could be possible to get 4K video from my camera such as a Nikon D3200 some day?


short answer: No

longer answer: No because the crop/binning of the sensor is not 2K. And the data bus between the parts would be saturated before you got to 24fps.
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Re: Getting RAW Video

Postby Shadowww » Tue Jun 02, 2015 5:04 pm

Is it possible to get lower frame rate full-resolution video, though? Even 3 fps 4K video would be better for creating timelapse than taking a lot of photos (because shutter/mirror wouldn't get worn out)
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Re: Getting RAW Video

Postby leegong » Tue Jun 02, 2015 10:06 pm

Shadowww wrote:Is it possible to get lower frame rate full-resolution video, though? Even 3 fps 4K video would be better for creating timelapse than taking a lot of photos (because shutter/mirror wouldn't get worn out)

In theory it's possible , for example in LV super zoom mode , full resolution 4922x3280 video is sent from IMX071 to EXPEED ,
so we can resize it into 4K frame , lots of hacking needed , especially chip4000 and chip4001 hacking .
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Re: Getting RAW Video

Postby lain » Tue Jun 02, 2015 10:10 pm

leegong wrote:
Shadowww wrote:Is it possible to get lower frame rate full-resolution video, though? Even 3 fps 4K video would be better for creating timelapse than taking a lot of photos (because shutter/mirror wouldn't get worn out)

In theory it's possible , for example in LV super zoom mode , full resolution 4922x3860 video is sent from IMX071 to EXPEED ,
so we can resize it into 4K frame , lots of hacking needed , especially chip4000 and chip4001 hacking .

And the framerate for that is 45fps maximum, isn't it? So it could in theory do 24fps, unless I am remembering wrongly...
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Re: Getting RAW Video

Postby leegong » Tue Jun 02, 2015 10:17 pm

lain wrote:And the framerate for that is 45fps maximum, isn't it? So it could in theory do 24fps, unless I am remembering wrongly...

Sorry , lain , i don't think 24FPS 4K is possible on D5100 , the major bottleneck isn't 45FPS setting for EI155 ,
i think the bottleneck probably is maximum performance of EXPEED , such as bus rate , processing speed of image engines ...
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Re: Getting RAW Video

Postby lain » Tue Jun 02, 2015 10:20 pm

leegong wrote:
lain wrote:And the framerate for that is 45fps maximum, isn't it? So it could in theory do 24fps, unless I am remembering wrongly...

Sorry , lain , i don't think 24FPS 4K is possible on D5100 , the major bottleneck isn't 45FPS setting for EI155 ,
i think the bottleneck probably is maximum performance of EXPEED , such as bus rate , processing speed of image engines ...

Ah I see, yeah. Even if we can bypass the processing and just write RAW to the card, it would require far too much bandwidth. Something like 550MByte/s -- too fast for SD. Ah well, still useful for timelapse as Shadowww pointed out.
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Re: Getting RAW Video

Postby leegong » Tue Jun 02, 2015 10:30 pm

Yes , you are right lain .
I think there isn't so much performance room in EXPEED2 , IIRC , in my patch for HDMI 1080 full screen output ,
performance bottleneck starts to appear .
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Re: Getting RAW Video

Postby hamed » Wed Jun 03, 2015 2:25 am

leegong wrote:
Shadowww wrote:Is it possible to get lower frame rate full-resolution video, though? Even 3 fps 4K video would be better for creating timelapse than taking a lot of photos (because shutter/mirror wouldn't get worn out)

In theory it's possible , for example in LV super zoom mode , full resolution 4922x3280 video is sent from IMX071 to EXPEED ,
so we can resize it into 4K frame , lots of hacking needed , especially chip4000 and chip4001 hacking .


leegong i think aspect ratio is more important than the resolution. i use 4k just for reframing in post and in interviews i use one camera instead of two cameras.
aspect ratio makes sense alot!! for example do you think 2k 2.35:1 is possible?
since the scope aspect ratio has less pixels i think it makes some room for increasing resolution for who needs this. i guess 2.5k or maybe 3k scope is possible. (maybe!!!)

:grin: and a crazy question:
since the newer models have two slot for memory cards do you think is it possible for using both cards for increasing bandwidth? (something like raid)
nikons has a very narrow bandwidth for sd cards.

thank you leegong!
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