[Philippos]

1024......

If it is 1024 X 768, my guess is that the codec will be MJPEG. Much easier to implement.

Hopefully, this is ONE of the non-standard resolutions and not the maximum offered...

[Steelski]

Would they really use a 4:3 format for the video though? Om81 (I think) mentioned in another thread specifically that the horizontal resolution wouldn't be 720 or 1080, so maybe 1024 is the horizontal resolution. Most video (HD at least) is done in 16:9 I think, so that would be about 1820x1024, or maybe they'll just keep the 3:2 format of the sensor and use 1536x1024.

None of those makes much sense to me though.

I think He is guessing as that was the old resolution from K20D in burst mode.
I am guessing too, but I guess that 1080p is in there as well as 720p.

[quarc]

I think He is guessing as that was the old resolution from K20D in burst mode.
I am guessing too, but I guess that 1080p is in there as well as 720p.

That would still be the same or very similar resolution from the K20 burst mode. The 'only' thing they would have done then is to go from 21 fps to 25 fps, and of course to put a videocoder of some kind in the camera. Not so impressive. I would not be surprised if we will see 3000x2000 resolution at 25 fps, and then you select if you want to store as mpg (video) or jpg (photos). Would of course also be really cool if you with lower resolution could get really high frame rates, but I guess that is not very likely.

I haven't decided what I think of this video stuff (from my perspective). I bought a very good video camera many years ago, and mixers and stuff. With this new camera I will be tempted to start filming again.....but it takes a long time to edit and make something with films, and it fill harddisks even worse than uncompressed DNGs :-) But who can resist to try the 10-17, the 85/1.4 or the 300/4 with video and see how interesting one can make it look :-)

[falconeye]

Let me assume that Om81 has actually revealed true information.

I.e., that videomode is ?x1024 @ 30 fps.

In this thread:
https://www.pentaxforums.com/forums/pentax-dslr-discussion/21941-k20d-burst-m...esolution.html
I had analysed that the burst mode of the K20D had been implemented by subsampling from 6x3 raw pixels into one video pixel and basically doubling the horizontal resolution on output (yielding 1536 x 1024 in bad quality).

Om81's "1024" figure wouldn't bother me (I would have no problem adding 28 pixel high black borders to video to end up with a standard HD definition.

But I am concerned that Pentax still is in trouble to read out enough pixels fast enough to create a decent video frame image quality. Especially as the sensor should yield 1040 lines if subsampled x3 ...

Maybe, they now subsample from 2x3 pixels which would create 2304 x 1024 pixels and this would be great. But I suspect they subsample from 3x3 or less and so I am not looking forward to great video quality here.

Of course, I can be wrong and I actually hope so Let's see...

[mattdm]

I would not be surprised if we will see 3000x2000 resolution at 25 fps, and then you select if you want to store as mpg (video) or jpg (photos). Would of course also be really cool if you with lower resolution could get really high frame rates, but I guess that is not very likely.

We did the math on this before with the K20D — the burst mode is ¹⁄₉th the size of the normal resolution, with pixels combined in 3×3 blocks. The continuous-until-card-is-full drive rate is exactly ¹⁄₉th the 21 fps one gets in the ¹⁄₉th-resolution mode.

Presumably, then, a K20 firmware update could deliver a ¹⁄₄th-resolution mode (2×2 blocks — 2336×1552) at 9.3fps. Or maybe not — that seems so super-useful that there must be some reason it didn't happen.

But assuming the logic holds, if the K-7 has the same sensor as the K10D and can do 6.25 frames per second in full resolution (I think it's unlikely, but still in the range of possibility since the likely competition is in that range), that would mean 25fps at 2336×1552 — and maybe 50+ fps in low resolution.

Going up to the 3000×2000 at 25fps you're suggesting is a big jump from 2336×1552 — about 60% more data. That in turn would imply over 10fps in full resolution, which seems really unlikely.

[falconeye]

¹⁄₉ ¹⁄₉

This is unreadable on my screen at 100%.

For others, it reads 1 / 4 and 1 / 9...


matt, I would like the subsampling would be from 2x2 blocks. Esp. as it is trivial because the Bayer matrix is 2x2 (Pentax introduces bad CA in their subsampling from 6x3 blocks).

But I fear they didn't bump bandwidth up by 6.4x ...

[mattdm]

This is unreadable on my screen at 100%.
For others, it reads 1 / 4 and 1 / 9...

Font problem? How does "¼" look?

matt, I would like the subsampling would be from 2x2 blocks. Esp. as it is trivial because the Bayer matrix is 2x2 (Pentax introduces bad CA in their subsampling from 6x3 blocks).
But I fear they didn't bump bandwidth up by 6.4x ...

Where's 6.4× coming from? The numbers in my last post say 2.7× would do it — still a big enough jump that it'd surprise me. But I may have miscalculated something.....

[Om81]

I think He is guessing as that was the old resolution from K20D in burst mode.

And also its a max number of lines, not an unique resolution!

[Philippos]

And also its a max number of lines, not an unique resolution!

Horizontal lines?

[LX60]

I personally don't think HD video belongs on a DSLR. To me, it's a sales ploy for NIKANON. If I want to shoot HD video I'll get an HD video recorder.

There have been more than a few times, when out shooting with my still camera, I would have given my left nut for video capture. The most memorable was watching a black bear swimming a big Montana river. He came ashore below a 100' bank that I was watching him from. It was straight up grade of sand & gravel. I thought "okay bear what are you going to do now". Well he did not hesitate trying to climb it. It was flat out remarkable that he made it to within a few feet of the top. He must have clawed off a couple hundred cubic yards of sand & gravel in the process, but ultimately gravity took over & he plunged a good 60' to the rocky bottom below & bounced about 10' in the air plunging back into the river. I could hear the wind being knocked out of him when he hit the rocks below. He was a big bruiser, probably around 350lbs. His head popped back up shaking off the hurt as he started swimming upstream to an easier bank.
I took several shots, most where a bit blurry do to a slow tele I was using, but none could even come close to what I had witnessed. Now a video even a blurry one would have been priceless:^)

Jer

[falconeye]

Where's 6.4× coming from? The numbers in my last post say 2.7× would do it — still a big enough jump that it'd surprise me. But I may have miscalculated something.....

As I had analyzed in the thread I mentioned above, the K20D's 1536 were upsampled from 768 when creating the JPG, not from reading the sensor.

So, here you go:

(6 x 3) / (2 x 2) * 30 / 21 = 6.4

[mattdm]

As I had analyzed in the thread I mentioned above, the K20D's 1536 were upsampled from 768 when creating the JPG, not from reading the sensor.

So, here you go:

(6 x 3) / (2 x 2) * 30 / 21 = 6.4

Ah, yeah, I missed that. That's really lame!

[Om81]

Horizontal lines?

Уеs.......

[NunoBarbosa]

Full HD is 1920x1080... i'm going to miss it.

1024 is very strange resolution for video - thinking in 16:9 proportion would be 1820x1024?

[ogl]

K-7 has 3 video modes.