@Driftwood

In theory I understand the general idea of 4x4 vs 8x8 -- but I'm not an encoding guru -- so I ask you to provide a general explanation or link to one.

Next, is this "true" 4x4, and if so, isn't this a big deal?

Thanks.

I have been getting a fair bit of camera freeze and lost recordings today shooting with AN Nebula 7 sharp on FSH with kit 14-140 lens + Heliopan fader ND 6+ 64gig sandisk in bright detailed scenes. Great patch though

@Manu4Vendetta I used a class 10 Transcend card with no problem.

@driftwood

I just got back from testing "Quantum GH3 Matrix Setting Test 2" on the familiar test range.

I like everything about it visually. Details are nice, highlights are as good as the GH2 gets, and I could very well be imagining mildly better dynamic range and less noise.

At 24H bitrates are almost universally 86 Mbps.

What I can say without a doubt is that this version does a substantially mediocre job on fast moving water. It looks exactly like a low bitrate long-gop -- indistinguishable from AVCCAM. Absolutely no “wow factor.”

Accordingly, my response is as predictable as the sunrise. I request a high bitrate long-gop version of this thing. I did try setting the gop of this patch in Ptools, but it resulted in an almost universal 21 Mbps at 24H. It's possible that tells us something.

So, exactly this setting in visual terms, but at 86 Mbps (relatively constant) in full long gop -- I expect would rank among the best ever settings for the GH2.

@fomalhaut3

Great job on that. Outstanding production value.

Thanks for the test. Fullscreen of this video is not available in Youtube.

I'm using a 32 inches 1080 monitor. The fullscreen for this video is locked. I can see other videos in fullscreen without problem, so it seems to be that this issue is not at my end.

Thanks for your reply.

The GH3 Setting is purely experimental to see what people think about the matrix that is running on the new GH3 and patched into a GH2. Its not brilliant but its okay as it isnt really designed for the GH2. For me I would have to agree with onionbrain in that works better in the GH3's Long GOP settings and I wouldve recommended a different matrix set for the All-Intra modes of the GH3. Pany have this matrix flatly across all the mov modes in the current GH3 firmware I tested.

Correction: @onionbrain In simple terms the GH3 codec's use of 8x8 Luma Transform and motion compensation using 8x8 blocks offers economical processing of the block size (4x4 blocks offer the smallest residual energy and more accuracy but can involve complex calculations).

Looking through the GH3 footage Ive seen so far most of the picture is predicted using 8x8 Transform along with 4x4 on stark 'highlight' frequencies changes - typically around edges where luma change is predominant.

There's loads of links regarding motion estimation, motion compensation prediction, DCT transform and quantization around here and the net.

A nice understanding of the High Profile and the 8x8 additional transform found in the GH3 is here: http://www.w6rz.net/H264HighProfile.pdf

Below are two pictures detailing the GH3's employment of 8x8 Intra Prediction for most of the picture and 4x4 Intra prediction is used for edges/ high contrasting luma frequency variations. This is from a 24p All-I GH3 recording. Notice that the i frames in the GH3's encoder are around half that of the GH2. This is the same for a whole range of detailed recordings - the bitrate, cpb coded pic buffer, and frame size in bits are substantially reduced in this rate control. IQ/QP is 20 like the GH2 but I believe somewhere in the Panasonic interpretation of the encoder is a cbrandin style 'Auto Quantiser' running off the base QP/scaling matrices - just like the GH2 after a few seconds the average QP improves tremendously.

The GH3 is producing mean QP of around 14 in a large amount of my GH3 tests. Significantly, the Intra Predicted 8x8 mblock transform is providing less complicated calculations with almost no loss in residual power yet in terms of HVS is still very pleasing to the eye. The use of High Profile means at least 12% increase in memory requirements satisfied by the new and improved processing power of the GH3. H264 bitrate ceiling limits for High Profile means in theory we should be able to push the GH3 hacked to over double its current bitrate without problems at decode level/memory bandwidth. This will go to improving any artefacts that we see in the stock implementation.

Filmed with the Apocolypse Now Intravenus settings. My first time to use this hack. Works quite well but boy does it take up a lot of space. I think I got around 20minutes on a 32GB card. The detail this thing captures is amazing. I used the 7-14mm and 12-35mm lenses by Panasonic. Enjoy!

Cluster 7 sharp2, hyperprime 12mm, pancake 20mm, profile smooth

@mlysbakken Interesting images. Kinda looks like a more intimate/indie version/variation of Hangover. Thanks for posting. Keep rockin!

@Nameless Thank Christ these ultra film-like patches are now freely available to artists such as yourself, so that your work can be presented and preserved in the highest possible quality.

Please, never stop gifting us your magnificence.