@cbrandin

FWIW, I always found a GOP of 6 was more stable on the GH1 and probably the GH2. When using GOP6 with the 1080p 24N hack on the GH1 I found the auto focus on the 14-140 was a helluva lot faster than a 3 GOP. It's true to a lesser extent on the GH2. Could never figure that out...

@APXmusic
- which one?

@telkitachki
here a GOP1 Setting for testing - vegas pro 10: 47,952fps (!?) for 1080/24p

@nic2011
>Is it necessary to shoot a 1080p first to get 720p60 working? yes!!!
> Does the gop1 1080p24 . . . work without any crash - is it really stable? is not stable!!!

@producer

Why did you convert your video sample above from 1080 to 720?
It suffers badly from this

GOP3 really is better???
i found this:
[Vimeo]

@driftwood
no not unfair - see you vimeo are same: Lens 14-42mm, nostalgic -2 all
where is the problem for you!?

and i think, No. 2 is GOP3 "and a tad better" No. 3 and 4 is difficult

First post here. Count me in as a supporter! Thanks Vitaliy and everyone else that's helping out. This is seriously cool!

I have several questions that I believe are pertinent to this thread having read all 11 pages:

1.) I've read "24pN" a lot on this thread. What is this? I've heard of 24p, 30p, 60i, but never heard of 24pN before.

2.) It's been mentioned that at GOP3 the cadence is IBB. Is it a setting that drops the P frames, or will this always happen at GOP3? In other words, will it be IPP if you don't change some other setting? If not, why does the camera choose to ditch P frames over B when the GOP is shrunk to 3?

3.) I don't understand why ANY Class 10 card should have write speed issues even at 100Mbps. A SanDisk Extreme card is 30MBps. That's 240Mbps. TOTALLY enough overhead, it would seem. Even at 15MBps that's still 120Mbps, so plenty of overhead for any extreme setting listed in this thread. Am I missing something here?

4.) As I'm understanding it, 65Mbps is the maximum rate for a GOP of 3. It's also mentioned that GOP 6 is almost indistinguishable and possibly more stable. With the encoder having to work harder, though, on more encoding one P frame instead of one I frame over six frames, does GOP6 require slightly lower bitrates to run stable relative to GOP3? In short, what's the max stable bitrate at GOP6?

5.) So by running a high bitrate GOP3 in 24H, we're pretty much giving up 24L completely due to bugginess?

6.) This is probably the most important question: This is my wife's primary photo camera as well. Does ANY of this have any effect on the photo side of the camera?

Thanks in advance, and you guys are studs!

@Butt

"GOP3 really is better???"

Tests like these prove nothing for 3 GOP. The camera and subject have to MOVE and MOVE A LOT to see any difference with a shorter GOP. With a static camera and someone slowly turning their head and smoking, the stock GH2 at 24mbit with a 15 GOP will always look great. And there is no way to judge the motion effects of 3 GOP on a Vimeo encoded clip. Their encoder is pure crap when it comes to encoding motion, it stutters like crazy. The only way to judge is to download the original .mts file. If it's an edited transcoded file and you don't know someone's workflow, how do you know what you're looking at?

@geddyt
"This is my wife's primary photo camera as well"

I really think unless you're trying to shoot an indie movie or commercials for broadcast with this cam you don't need the 65Mb/s settings. Butt has some nice settings with lower bitrates that are probably more stable and if it's your wife's cam she doesn't need to put up with the 10 frame glitch that will always appear on the front of the extreme hack setting clips. 50Mb/s 6 GOP settings are great and they will more than suffice for 95% of the work people with do with these cams until Vitaliy and Chris can help us find more ways to stabilize the higher bit rate settings.

I've been using Kae's 65MB/s 1080 24P 3 GOP setting for the past week including interview footage. The audio is in perfect sync.

@Ishvar;


Waooo the GH2 VL is big?! ( minut 00:16 :-)

>You really need to keep everything identical. The position of the camera changes too much to be a useful test. For example in the dog video one shot is much much closer to the dog than the other. The closer shot will give the appearance of much more detail. Also you need to focus manually and preferably use a pure manual focus lens so that the focus never changes between equivalent tests.

why do I?