The Panasonic G1HD | GH-1 Video Mode : A Real Video Mode

[stephenvv]

Just took a look at them. First, that's a great still from a $1500 video camera. I do see the issue at the edges but the larger file is almost unnoticeable at 100%. It's so much better than my HV30 stills - night and day really.

If that's the worst artifact you've found, I'm actually more impressed now. But based on the fact I see none of it Phil's footage, we do need to figure out if it's lens, firmware, codec etc.

 

[stephenvv]

It does really look like a scaling artifact, though that makes no sense

 

[Park Edwards]

not seeing what you're talking about Kholi

 

[Park Edwards]

well, i see something vertically on the windows frame, but nothing horizontally
and definitely not a enough for me to see unless i was looking extremely close.

 

[squig]

Because it's only affecting 50mm or wider I suspected that it was the extra data in a wide shot that is either pushing the encoder or codec to far. I just ran a test on my D90. The same scene @ 28mm runs at 20Mbps and @ 90mm it's 14Mbps.

Can you shoot some wide stuff on the L lower bit-rate settings. And have a look at the fps rate of your SH wide shots to determine if the codec is being maxed out.

Maybe the encoder/debayer is not coping with that amount of data coming in? It's not really my area of expertise, feel free to jump in anytime Matt.

 

[squig]

EDIT: OOPS.. This is an answer to something somewhere else!:

Its just like dvcproHD tape in 720p mode, even though it records 60p, if you choose 24p it only uses the 24p frames. So here if you drop a 720/60p file on a 24p timeline, you just drop the frames needed to get 24p (this happens automatically)- and because it divides evenly, footage will play just as smooth as shooting 24p originally.

thx

 

[Finster]

If that's the worst artifact you've found, I'm actually more impressed now.

That was my reaction, too. I practically breathed a sigh of relief when I viewed those two photos!

You're hardcore Kholi. Glad you're the one performing all these initial tests. How 'bout if I mail you an iTunes gift card for all your hard work!!! :laugh:

 

[Ian-T]

Call me stupid...but where are yall uploading this pic. I can't find it.

Edit: Sorry....found it. Threads are moving at lightning speed.

 

[squig]

not seeing what you're talking about Kholi

most noticeable on the SUV wheel and the diagonal car window frame bit (whatever that's called)

 

[squig]

I saw it straight away, but I'm a picky bastard like Kholi

 

[Ian-T]

I'm glad you guys pointed that out because I couldn't see a thing with my 20/15 vision.

Kholi, where do you have sharpening set? Is it off?

I have to say...the picture is beautiful looking. I don't have any problems with this image. (But I am coming from an HV20 with its own aliasing issues that can be much worse than this). I just wonder what it looks like when in motion.

 

[squig]

I wouldn't say beautiful but it's a lot better than the D90. I'd like to see how 24Mbps looks. Panny need to unleash a better codec on this thing but for now and for the money I'm not complaining. In the right hands some really good films are gonna be made.

 

[squig]

Nothing Lee and Matt can't fix?

 

[Nektonic]

That's not too bad at all, especially when we consider that things will only get better from here on out over the next couple years with these types of hybrid cameras. I probably wouldn't have noticed the aliasing if I wasn't actively searching for it. On an HD LCD or Plasma I doubt it would be that big of a deal. Although, if it gets worse with camera movement and changes during movement then I could see that being more of a serious problem.

And if your audience is so bored that they're looking for jaggies you've lost the battle by then anyways. It is a different medium, but if any of you have played Grand Theft Auto IV or Halo 3, you no doubt have witnessed jaggy armageddon. I don't think I've seen more aliasing in my life, and that didn't stop people from enjoying those games.

Plus, aren't there anti-aliasing plug-ins for the various NLE's?

 

[Ian-T]

I wouldn't say beautiful ....

Oh sure...things can be much better...but it was really a comparison to my HV20. As much as I love my little cam that could that is one thing I hated about it...those funky lines.

 

[squig]

Surely there's a 100Mbps AVC-INTRA GH1PRO in the pipeline......with a "PRO" pricetag to match

 

[Nektonic]

Oh sure...things can be much better...but it was really a comparison to my HV20. As much as I love my little cam that could that is one thing I hated about it...those funky lines.

I've got a feeling that those of us that are coming from DV or HDV will be pretty content with the GH1, sans wacky AVC-HD workflows and no external monitoring options.

It is going to be those that are used to P2, Redcode, AVC Intra, XD-CAM HD, etc... that will be less impressed with the 17 mbps AVC-HD of the GH1. This is totally understandable since once you get used to a better codec or format, it is hard to go back. I would never want to go back to regular old DV now that I'm used to what my Canon HDV stuff can produce.

Surely there's a 100Mbps AVC-INTRA GH1PRO in the pipeline......with a "PRO" pricetag to match

I am excited about the GH1, but I too hope the not too distant future brings some more robust offerings. With P2 cards now costing half price, I'm hoping for a P2 based prosumer camera body with a m4/3 sensor and maybe AVC Intra 50/100 from Pany, or Canon's fabled APS-C sensor XL-H1 replacement using the robust codec/format from the 5D mk2. Then of course there is Scarlet as well.

I almost wonder how long the GH1 will even be so popular. The new stuff comes out so quickly that by the time I can even get a GH1 in my hands something bigger and better might already have been announced.

 

[mkeep]

Weird, the aliasing is there but it's not too bad. I wonder why it would only be on the wide? Other than the fact that the wide is distorting straight lines in a way that accentuates the aliasing?

 

[Boz]

I almost wonder how long the GH1 will even be so popular. The new stuff comes out so quickly that by the time I can even get a GH1 in my hands something bigger and better might already have been announced.

Isn't that called Scarlet?

 

[LizaWitz]

I believe that the the stills version of this camera-- the G1-- does adjustments to the image to correct for barrel distortion in camera, while shooting stills.

If the Aliasing is happening only with certain focal lengths, then its quite possible the video version of the camera is doing the same thing, and the aliasing is an artifact of that adjustment process.