Pentax K-3 Video Discussion

falconeye · 10-10-2013, 03:02 AM

Originally posted by sledger

It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk.

Yes, if things were different.

But both menu items designate stabilization during video. It is just not meaningful to deduce implementation from this.

It is like saying: the K50 has a burst mode menu item, so the K-3's burst mode must be same speed as K50 because they named it the same. It simply isn't a possible deduction. Same for "Movie SR".

gazonk · 10-10-2013, 03:10 AM

Originally posted by falconeye

It is a separate setting from SR on/off during stills, hence the different menu item name to avoid user confusion.

- which is a good idea, so the user knows that (s)he is only affecting movie SR when changing the setting here. I don't think "Movie SR" means a specific implementation in "Pentax lingo". My 7 year old (and still waterproof

) Optio W10 has the "cheap" electronic variant, and Pentax called it "Movie anti-shake" back then.

Fogel70 · 10-10-2013, 03:23 AM

On DSLR using sensor stabilization for video they call SR for "Shake Reduction" for both photography and video, but on cameras using digital SR for video they only use "Shake Reduction" for photography and "Video SR" for video.

So at least so far they have used a separate name for "digital SR".

jaad75 · 10-10-2013, 03:24 AM

Originally posted by falconeye

and nobody ever complained about its rolling shutter effect in stills...

It's quite visible if you're trying to freeze the movement of some objects with a shutter instead of short duration flash. Not only in Pentax cameras of course.

gazonk · 10-10-2013, 03:54 AM

Originally posted by falconeye

nobody ever complained about its rolling shutter effect in stills...

Well, a couple of years ago my son asked me what happened to the walls of the houses he shot with his iPhone 3G out of the window of a train :-)

jonny1986 · 10-10-2013, 04:27 AM

the best part is hat i was ready to by a gh2 or 3 for video but seems that the k3 will be a great video camera...we must wait for an hack like gh2 to have the best anyway.

falconeye · 10-10-2013, 05:19 AM

Originally posted by gazonk

Well, a couple of years ago my son asked me what happened to the walls of the houses he shot with his iPhone 3G out of the window of a train :-)

The little word "its" in the quoted text referred to a focal plane shutter. The iPhones have no such shutter.

jaad75 · 10-10-2013, 05:34 AM

Originally posted by falconeye

The iPhones have no such shutter.

It doesn't matter, the regular FP shutter gives you the same results with objects moving fast enough.

falconeye · 10-10-2013, 09:58 AM

Originally posted by jaad75

It doesn't matter, the regular FP shutter gives you the same results with objects moving fast enough.

Post makes no sense when reading my posts again.

johnmflores · 10-10-2013, 10:41 AM

At this point I think that all we can do is wait for some video-oriented testers to get their hands on the K-3 and really put it through its paces.

**monochrome** · 10-10-2013, 11:30 AM

Originally posted by sledger

It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk.

Many of us here own more than one Pentax camera, to my mind that's exactly what users will do and Pentax would certainly be careful in keeping things standardised across models. It just makes sense.

Originally posted by falconeye

Yes, if things were different.

But both menu items designate stabilization during video. It is just not meaningful to deduce implementation from this.

It is like saying: the K50 has a burst mode menu item, so the K-3's burst mode must be same speed as K50 because they named it the same. It simply isn't a possible deduction. Same for "Movie SR".

Q/K-01/K-30/K-50 are the limited, different, mid range Menu set and control dial / button set. K-3/K-5/II is the full-featured Menu and Contol Dial set. It is natural to expect definitional and operational changes from the Mid-range Menu to the Full-Feature Menu.

falconeye · 10-10-2013, 03:36 PM

Anybody saw this? ->

You Tube

It says twice the buffer size and 5x readout (14 Bit data transfer) speed.

If they make use of this 5x speed improvement when grabbing frames, assuming the same subsampling layout, then the jello effect could be reduced to 30% of that of the K-5. Theoretically. Maybe, this picture is wrong if it refers to the Milbeaut chip and the sensor itself is the bottleneck.

jaad75 · 10-10-2013, 03:58 PM

There is an English version of it and it says 5x transfer speed and 2x buffer capacity. Animation clearly suggest that it is about processor- buffer transfer, not sensor readout speed.

kenyee · 10-10-2013, 06:00 PM

Originally posted by jonny1986

the best part is hat i was ready to by a gh2 or 3 for video but seems that the k3 will be a great video camera...we must wait for an hack like gh2 to have the best anyway.

Wait for the bitrate numbers and tests...the GH2/GH3 did well because of high H.264 bitrates...
Weird that Pentax didn't publish this. Or mention that you could get the uncompressed data stream over the HDMI port.

For reference, other bitrates
5D Mark II = 38-Mbps
5D Mark III = 90Mbps (I frame)
7D = 47-Mbps
D800 = 24-Mbps (B frame so more efficient but puts out uncompressed HDMI)
GH3 = 50Mbps (B frame like D800) or 72Mbps (I frame)

But the weird thing is the GH3 has more video resolution than the D800/5DmkIII which are closer to 720p.

falconeye · 10-11-2013, 03:32 AM

Originally posted by jaad75

Animation clearly suggest that it is about processor- buffer transfer, not sensor readout speed.

You are right, my fault. Its just the memory interface speed.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Now that official K-3 specs are released, how good for video?	jake14mw	Video Recording and Processing	20	10-14-2013 12:56 PM
Pentax Optio WG-3 video download challenge	Eric Z.	Troubleshooting and Beginner Help	2	09-06-2013 06:33 PM
With HDMI out & 3.5mm stereo mic in the K-01 is better than the K-30 for video	jogiba	Pentax K-01	2	05-22-2012 01:52 PM
Spot one! robertstech.com discussion on K-01	hcc	Pentax K-01	18	02-08-2012 07:22 AM
Short Movie - Robot Warriors + Discussion on DSLR for Video	tiny	Video Recording and Processing	2	06-21-2010 12:29 PM

10-10-2013, 03:02 AM	#166
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by sledger It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk. Yes, if things were different. But both menu items designate stabilization during video. It is just not meaningful to deduce implementation from this. It is like saying: the K50 has a burst mode menu item, so the K-3's burst mode must be same speed as K50 because they named it the same. It simply isn't a possible deduction. Same for "Movie SR".

10-10-2013, 03:10 AM	#167
gazonk Pentaxian Join Date: Feb 2009 Location: Oslo area, Norway Photos: Gallery \| Albums Posts: 3,746	Originally posted by falconeye It is a separate setting from SR on/off during stills, hence the different menu item name to avoid user confusion. - which is a good idea, so the user knows that (s)he is only affecting movie SR when changing the setting here. I don't think "Movie SR" means a specific implementation in "Pentax lingo". My 7 year old (and still waterproof ) Optio W10 has the "cheap" electronic variant, and Pentax called it "Movie anti-shake" back then.

10-10-2013, 03:23 AM	#168
Fogel70 Pentaxian Join Date: Sep 2009 Location: Stockholm, Sweden Photos: Albums Posts: 3,062	On DSLR using sensor stabilization for video they call SR for "Shake Reduction" for both photography and video, but on cameras using digital SR for video they only use "Shake Reduction" for photography and "Video SR" for video. So at least so far they have used a separate name for "digital SR".

10-10-2013, 03:24 AM	#169
jaad75 Veteran Member Join Date: Sep 2007 Location: Cracow Posts: 457	Originally posted by falconeye and nobody ever complained about its rolling shutter effect in stills... It's quite visible if you're trying to freeze the movement of some objects with a shutter instead of short duration flash. Not only in Pentax cameras of course.

10-10-2013, 03:54 AM	#170
gazonk Pentaxian Join Date: Feb 2009 Location: Oslo area, Norway Photos: Gallery \| Albums Posts: 3,746	Originally posted by falconeye nobody ever complained about its rolling shutter effect in stills... Well, a couple of years ago my son asked me what happened to the walls of the houses he shot with his iPhone 3G out of the window of a train :-)

10-10-2013, 04:27 AM	#171
jonny1986 Inactive Account Join Date: Dec 2007 Location: italy Posts: 411	the best part is hat i was ready to by a gh2 or 3 for video but seems that the k3 will be a great video camera...we must wait for an hack like gh2 to have the best anyway.

10-10-2013, 05:19 AM	#172
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by gazonk Well, a couple of years ago my son asked me what happened to the walls of the houses he shot with his iPhone 3G out of the window of a train :-) The little word "its" in the quoted text referred to a focal plane shutter. The iPhones have no such shutter.

10-10-2013, 05:34 AM	#173
jaad75 Veteran Member Join Date: Sep 2007 Location: Cracow Posts: 457	Originally posted by falconeye The iPhones have no such shutter. It doesn't matter, the regular FP shutter gives you the same results with objects moving fast enough.

10-10-2013, 09:58 AM	#174
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by jaad75 It doesn't matter, the regular FP shutter gives you the same results with objects moving fast enough. Post makes no sense when reading my posts again.

10-10-2013, 10:41 AM	#175
johnmflores Veteran Member Join Date: Apr 2009 Location: Somerville, NJ Photos: Gallery \| Albums Posts: 5,361 Original Poster	At this point I think that all we can do is wait for some video-oriented testers to get their hands on the K-3 and really put it through its paces.

10-10-2013, 11:30 AM	#176
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	Originally posted by sledger It is quite reasonable to expect that they would not use the exact same menu name to mean two different things, Falk. Many of us here own more than one Pentax camera, to my mind that's exactly what users will do and Pentax would certainly be careful in keeping things standardised across models. It just makes sense. Originally posted by falconeye Yes, if things were different. But both menu items designate stabilization during video. It is just not meaningful to deduce implementation from this. It is like saying: the K50 has a burst mode menu item, so the K-3's burst mode must be same speed as K50 because they named it the same. It simply isn't a possible deduction. Same for "Movie SR". Q/K-01/K-30/K-50 are the limited, different, mid range Menu set and control dial / button set. K-3/K-5/II is the full-featured Menu and Contol Dial set. It is natural to expect definitional and operational changes from the Mid-range Menu to the Full-Feature Menu.

10-10-2013, 03:58 PM	#178
jaad75 Veteran Member Join Date: Sep 2007 Location: Cracow Posts: 457	There is an English version of it and it says 5x transfer speed and 2x buffer capacity. Animation clearly suggest that it is about processor- buffer transfer, not sensor readout speed.

10-10-2013, 06:00 PM	#179
kenyee Veteran Member Join Date: Mar 2007 Location: Boston, PRofMA Photos: Albums Posts: 3,026	Originally posted by jonny1986 the best part is hat i was ready to by a gh2 or 3 for video but seems that the k3 will be a great video camera...we must wait for an hack like gh2 to have the best anyway. Wait for the bitrate numbers and tests...the GH2/GH3 did well because of high H.264 bitrates... Weird that Pentax didn't publish this. Or mention that you could get the uncompressed data stream over the HDMI port. For reference, other bitrates 5D Mark II = 38-Mbps 5D Mark III = 90Mbps (I frame) 7D = 47-Mbps D800 = 24-Mbps (B frame so more efficient but puts out uncompressed HDMI) GH3 = 50Mbps (B frame like D800) or 72Mbps (I frame) But the weird thing is the GH3 has more video resolution than the D800/5DmkIII which are closer to 720p.

10-11-2013, 03:32 AM	#180
falconeye Veteran Member Join Date: Jan 2008 Location: Munich, Alps, Germany Photos: Gallery Posts: 6,871	Originally posted by jaad75 Animation clearly suggest that it is about processor- buffer transfer, not sensor readout speed. You are right, my fault. Its just the memory interface speed.