Tag: gh2

Hacked Panasonic GH2 vs Hacked GH1 @ 1080p and 720p

 

 

 

 

Here is my first preliminary test comparing the hacked GH2 vs the GH1. The GH2 was using the following settings

Ptool 3.61D
720p SH mode
48mb high
35mb low
GOP 15

This is not a recommended setting, but has been working just fine for me producing 720p footage with average bitrates over 40mb a second with out causing any errors on PNY cards.

1080p mode
44mb high
35mb low

 

Just a slightly higher bitrate than Vitality’s recommended settings. Again, Vitality is stressing not to mess with the GOP right now, as I did with 720p, so do so at your own risk.

The GH1 was using lpowell’s 75mb high reliability patch

Both cameras used the same lens, same f-stop WB kelvin and shutter settings. The GH1 was used at 100iso and the GH2 at 160iso accounting for the difference in ISO ratings between the cameras.

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GH2 Hack – 720p upgraded to 28mb with B-frames

Thanks to mpgsvcd in this thread: http://www.personal-view.com/talks/discussion/335/ptool-3.60d-gh2-avchd-encoder-settings/p1 We now have a greatly improved 720p mode for the GH2, and the first useful bitrate hack for the camera. Play the video below in “Original” quality on youtube to take a look at how the windmill motion is captured. For the most part, this will remove the macro blocking that was evident in this mode due to the low bitrate before the hack.

 

 

 

 
Here is a capture of the actual datastream of the windmill shot.
 

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GH2 hacked!

Vitality does it again! I’ll have more information as I start and try the patches myself. For now the most recent information is in this forum.

 

http://www.personal-view.com/talks/discussion/332/ptool-3.60d-topic#Item_33

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Guess the camera!

One camera is a Hacked GH1 at 100mb, the other is a GH2. One camera is cropped to 2:35.1, the other actually has the anamorphic lens. They are mixed almost exactly 50/50 …

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7D ISO 12800, GH2 ISO 12800, GH1 ISO 3200

What this short video is about is taking all three cameras to the extreme. Is this a particularly useful test? Probably not. But there are always a few people out there that demand the best high ISO performance and will use whatever it takes to capture the shot.

To set this up, we have to keep in mind that the Panasonic cameras will only go to their max ISO settings when in shutter priority mode with an electronic lens. This does not allow us to use the same lens on both brands of cameras, which is typically a place we don’t want to go with these types of tests. Also, there is no specified ISO on the screen while shooting in shutter priority with Ev set to +3, so we have to test against stills in order to ascertain the ISO the camera is shooting at.

Relative ISO. The GH1 at ISO 3200 is equivalent to the GH2 and 7D at around ISO 6400. You can see in this test it has quite a bit less chroma noise just from being at half the ISO of the other two cameras.

Here’s a test from last week with just the gh2 and the 7d – unfortunately again this is less comparable as one lens is f1.7 and the other f2.0
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