Panning 'mud', reasons why and firmware update

Daniel L. said:
I recall reading somewhere that the rolling shutter on the K-7 is about as bad as on the D90. Can't seem to find the source now... Maybe this will be improved by the time it's ready.
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Not from what I can see. That's shot with 200mm glass handheld from what I can tell. I've shot 105mm handheld D90 and it's jello city. The K-7 has image stabilization built in to the body.
 
just to be a party peeper though I did notice some aliasing on the logo on the kids shirt.....Kholi won't be pleased. :D
 
squig said:
That Pentax K-7 mjpeg footage of the kid with the baseball bat retains the detail. It seems to me that it's something inherent with long GOP codecs and the lower the bit-rate the lower the frame integrity with fast motion. The mjpeg stuff from the GH1 that I've seen handles motion much better than the AVCHD stuff.
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Does anyone know what the bit-rate for the GH1 MJPEG is at?
 
raymondluo said:
Does anyone know what the bit-rate for the GH1 MJPEG is at?
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from the raw clips I've had access to it's been between 13Mbps and 31mbps averaging about 20Mbps. So a little higher than the D90 which ranges from 7-25Mbps averaging about 15Mbps. The D90 however is 24fps so it's pretty close per frame.
 
squig said:
the "odd" frame size 3:2 is ok if you're gonna shoot anamorphic.
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Imagine a 2X anamorphic with that. The anamorphic you have will work excellent with this frame ratio... Hunters Lomo would too!

The sad part is, it's quite apparent the codec is cleaner than it should be from Pentax..... I just wish the GH1 had that Mjpeg instead of AVCHD on it's 1080/24 mode.




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It will be a real shame if the pentax doesn't get manual control and 24p. these DSLRs are getting so close.
 
GH-1 uses PhotoJPEG by the way. Check the untouched examples around.

Sign the petition, maybe we can get a 1080/24 PJPEG if everyone bugs Panasonic enough.
 
squig said:
It will be a real shame if the pentax doesn't get manual control and 24p. these DSLRs are getting so close.
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It's Pentax at V.1. I have zero expectations. I'm glad that there just jumping in and giving it a try...

However I hold Panasonic and Canon at a higher standard, and I'm far far less forgiving for stupid implementations from them . With Pentax,, it's Pentax.

Pentax made good cameras way back, and lenses. I still have my Japanese's built K1000 35mm still camera that my dad got me when I was 9yrs old. That thing was a work horse through childhood, HS and on.




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Kholi said:
Haven't you already chosen your camera? Tsk tsk
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not until it's bought and paid for.

Pentax just got back to me, shipping July. Love the codec but don't know if I want to go back to no manual control but if I could get one next week I'd be willing to pull a Kholi and be the crash test dummy. Maybe Ned would be nice enough to send me one.

it looks like a very nice DSLR. weatherproof seals.....snowboard hell

and only a bit more coin than a D90 @ triple the bit-rate

I even have a pentax K mount anamorphic lens
 
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Kholi said:
GH-1 uses PhotoJPEG by the way. Check the untouched examples around.

Sign the petition, maybe we can get a 1080/24 PJPEG if everyone bugs Panasonic enough.
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Hey Kholi,

I actually like the GH1 a lot; just two things piss me off. The HDMI Live - not! However that I can live with. The biggest gripe is the codec is crap. It's a shame; the camera has the right sensor size pretty much and its totally cool. However at the end of the day, it either produces a clean image or it doesn't.

I do have untouched Mjpegs from the GH1, and well there crappy...... The video looks soft and something just isn't right with the GH1 implementations of the video coming off that sesnor.

Unless you have otherwise.........

That said, I want 1080P/24. The Spec they advertise it does......

That GH1 sensor is way way way way beyond the 1080P spec; and to not get access to that, or at least half the potential of that sensor, just cause they choose a bad codec setup, is a major FUBAR and damn shame.



It's like taking a 2010 Mercedes-Benz SLR ( that car gives me a B#ner ) and putting stone wheels on it.....

WTF.......... Panasonic......

Makes NO sense!





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the trouble is 1080 is 2.5 times the amount of pixels as 720 squeezed into the same 17Mbps stream. It's asking a bit much.

17Mbps can barely manage 720 and needs to be at least 24Mbps
 
I know this has been said before. But I don't think the bitrate is the problem. My XH-A1 could take any sort of fast motion. Would it look great? No. Would it do what the GH1 does? Not even close.

My understanding is that 17mbps H.264 should blow 25mbps Mpeg2 out of the water.
 
AVCHD relies on guessing between frames.

That's okay when nothing much changes from frame to frame.

But with a big pan, this system goes to hell and it seems the codec implementation either cannot keep up or does not have a fail safe in place to prevent the corruption.

Maybe this issue will be fixed with a B frame firmware update.

Maybe it's a hardware issue and cannot be fixed with software.

Either way an explanation from Panasonic would be great, to shed some light on the matter and stop all this guess work.
 
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