If I did a long gop patch.... A new theory for Long GOP fans in patch vault. ;-)

I'm sure you'll get 4:2:2!

On the hacked GH4

Hei!

Won't we be needing an "Official High GOP topic" now? :)

@bkmcwd Yeah, have a play with the settings see what works under 3 GOP... You never know it might work out.., let me know mate.

LOL @duartix ! Actually, Its pretty good at 720p60 that patch... may incorporate a final version of its kind in a version of Quantum ... I'd like you to test it further - maybe play with the settings a bit more? Thanks mate.

@driftwood

I just tested the XDCAM patch -- primarily for image quality (viewed on a calibrated production monitor), and I'll react to that after throwing a thought at you.

A few days back I wrote a long request complete with reasoning requesting a replica of AVCCAM (Panasonic's "professional implementation of the AVC/H.264 codec") except with the bitrate multiplied by three -- meaning a stable bitrate between 63 and 72 Mbps. In the unimaginative and conservative broadcast world this could be considered the rough equivalent of 144 Mbps intraframe, yet would capitalize on the efficiency of LongGOP. In theory, the above replicated AVCCAM multiplied by 3 would trounce the new Nikon codec "with B frames," beat the XF codec (yes, it's not 4:2:2, but 4:2:2 doesn't mean the same thing it meant four years ago now that editors (NLE's) are ingesting, correcting, and editing at 12 bit 4:4:4), vaguely be equivalent in image quality to the new Canon "All-I," and trounce many varieties of XDCAM.

I decided to sit on the above request to see what the new Ptools brings and the new patches.

SO -- when I saw this XDCAM patch -- I was very, very intrigued. In theory, I'm convinced the winning formula for the hacked GH2 is a high bitrate LongGOP -- that capitalizes on the efficiency of LongGOP while reducing compression. For example, in theory, a 100 Mbps LongGOP is equivalent to a 200 Mbps intraframe stream.

So -- if any of the above makes any sense to anyone -- I'm grateful if you pros will think about it. The key to the above is that AVCCAM is replicated as closely as possible (don't lower the GOPs) and that the bitrate remains relatively constant.

OK -- regarding the XDCAM patch... the first thing that screamed out at me when I looked at the files in the folder was the extremely low bitrates. Most of these files were coming in around the 17 Mbps range.

Image quality was good, on par with a stock GH2, and there was, essentially, no banding in blue skies. There was, however, blocky noise in the blue skies.

In some shots image detail was very, very good. It handled motion perfectly well.

So, it didn't look like a 17 Mpbs stream, but it also didn't look like a 50Mbps stream. Frankly, the not-joke here is that it looked like a 35 Mbps EXDCAM EX stream, except with elements of mpeg-4 detail.

@onionbrain There will be a higher bitrate version of the XDCAM implementation later which could be what you need. I'll take a look at the old AVCCAM standard but Lee is right, its nothing special. However, its nice to try and emulate different codecs using the GH2. I'll give it a shot as it won't take long.

Nice @redbaron

The image is virtually noise free. Did you post remove noise with ColorGhear or Neat Video (or other)?

I just ran a test using Driftwood's XDCAM 50Mbps on a GH2 with manual lens (Voigtlander) and Sandisk 8 MB class 10 (30 Mbps.)

First two recordings worked, but the third one locked up the camera with the usual message, requiring battery removal. I'll do some more tests, as I liked the look of the footage.

@driftwood Thanks for the tips. Here's some video I shot before it crashed:

Next, I have a comparison showing video shot with 720p mode using the Voigtlander 0.95 25mm, followed by the same scene with the Olympus Zuiko f2.0 zoom @ 25mm. I'll post those too -- no sign of a crash with this so far.

@driftwood , next week i will be shooting a Short Movie and i would like to know whats the best Patch for Film like Look?

whats the best Patch for Movie or Film look?

thanks will post the film when finish

@spacewig @daisuke @proaudio4 Yes, I did use the grainkiller. Here is a before and after color grade:

BEFORE

AFTER