75Mbps GH1 Peak Reliability Patch - V2 update

lpowell said:
Thanks for spotting this documentation error Lucas, I just now corrected it in the initial post. The GOP size in the original version of this patch was 20 frames and I neglected to update that detail when I revised the docs for the V2 High Reliability Patch. I did indeed find that a GOP of 26 frames performed more reliably than shorter GOP-lengths in 720p60 mode. For 720p50 mode, the original 25-frame GOP did not need adjustment for the V2 patch.
Click to expand...

Lpowell, I think you still have the PAL and NTSC GOP's reversed in the your post above. That contradicts what is in the INI files.

Original Firmware GOP PAL 26, NTSC 30
V1 Peak INI file GOP PAL 20, NTSC 20
V2 Peak INI file GOP PAL 26, NTSC 25

This is my favorite patch as you know.

BTW i did have a few write errors with NTSC with GOP at 25, absolutely none in PAL at 26
 
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rambooc1 said:
Lpowell, I think you still have the PAL and NTSC GOP's reversed in the your post above. That contradicts what is in the INI files.

Original Firmware GOP PAL 26, NTSC 30
V1 Peak INI file GOP PAL 20, NTSC 20
V2 Peak INI file GOP PAL 26, NTSC 25
Click to expand...
Thanks for spotting that, Rambo, I fixed the typo in my intial post.
 
so i hacked my GH1 with this patch, but im still getting interlacing on the AVCHD files of the SD card. Am i missing something? The Interlacing is suppose to not exist with native 24p files.
 
75Mbps AVCHD Interlaced 1920x1080 FHD mode @ 24/25 fps
For those who do not require Native 24/25p video files, this mode produces the highest quality images available from the GH1 in both 24p and 25p interlaced FHD video modes. Turbo-charged with a 75Mbps maximum bitrate, the codec's ability to track moving objects without producing mud is significantly improved. As with the 75Mbps SH patch, the FHD encoder maintains an average bitrate no higher than 50Mbps.


Although, You can always check off the native 24 box in ptools to turn this into native 24
 
this has become my standard/fave patch for the gh1!
surprisingly, it does playback in-camera! i transcode everything to edit anyhow so pulldown doesn't bother me.
i alternate this patch with 50mbps 'Fast-Action' when i need 30p for TV broadcast.
 

Here's my first test with the patch in NTSC mode, i edited this in the AVCHD 1080p24 preset in premiere pro 5.5, and saved in the youtube preset but changed framerate to 23.976 and level to 4.2 to get it to 1080, will that get rid of the interlacing and pulldown as i read somewhere?
 
lpowell - Many thanks for the generous sharing of all your careful work on the GH1 patches. I'm looking for a GH1 peak reliability patch with native 24p. Would you recommend (a) your Max latitude 24p patch; (b) this Peak Reliability Patch but with 24p checked; or (c) the Blackout-Powell Native 24p patch? Or something else? Thank you!
 
The Peak Reliability Patch will not work as intended with the Native 24p patch checked. The Blackout-Powell patch is what I'd recommend as most reliable for Native 24p work.
 
Lpowell, It seems like the 25p PAL patches are more stable than the 24p NTSC patches. Has anyone tried to make a hack that uses the PAL code path to generate high bitrate 24p?
 
Hello! Lpowell, thanks a lot for you wonderfull 75Mbps reliable 100% here in PAL zone!
I updated my old 75Mps in my GH1 to the new one 75Mbps. First I notice is the menu, diferent and easy to move into it. And maybe the Fn button doesn´t work, it became unoperative.
My only concern is that when I tried to switch between PAl and NTS in video out menu, just for trying 24p or more slow 60p capabilities I have the message "no adicional selecctions can be made" or something like that. But I´m sure I checked the frame with pal/ntsc switch in the patch. Another weird thing happens when I read my video with "media info", it only diferences between 1080 or 720, but never say MJPEG when reads one made with this codec, never tell more than 1920*1080 25 fps AVC ( NTSC ) (High@L4.0) (1 ref frames )
Is it normal? Thanks a lot!
 
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Switching between NTSC and PAL on the GH2 can be tricky. You need to make the switch in the Creative Movie Mode, then turn the camera on and off. Sometimes the SD card needs to be popped out and in again, and may even need to be reformatted. Once you've got it working, you can save separate NTSC and PAL setups to different Custom slots, and switch easily between them in the future.
 
But I still have GH1, I´m gonna buy GH2 soon, so this information is welcome, but in casa of GH1? Is ts the same tricky situations? When I choose mjpeg I´m abe to rec in any mode, but not with AVCHD
Thanks for your soon reply!
 
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Sorry about the typo, should've wrote GH1 rather than GH2. NTSC and PAL switching work the same on both cameras.
 
Everything perfect. Like you said little tricky but works. After formating ard in NTSC everything was just fine. Maybe NTSC 1080p 24p is a good setting to shoot with GH2 24p!
Thanks
 
My problem. I get the dreaded motion recording cancelled after 20secs to a minute; sometimes less.

I have GH1, Sandisk extreme 30mbs class 10 16gb card. I format before shooting. I power off after crash. I'm using v2 of the 75mpbs hack. I;m using the 14-140mm lens.

What i'm shooting subject wise is forest scene walking on a trail in the pacific northwest. I've tried using AEL lock at times and it helps " a little " but I cannot get 2 minutes if my life depended on it. Zooming the lens also kills the recording. Media info shows 43mbps overall.

What am I missing or am I expecting too much for an admittedly subject rich scenario (below is link to what i salvaged clips from the video - uncorrected colors straight from camera)?

https://vimeo.com/51957908
 
meinyvr said:
I;m using the 14-140mm lens.

What i'm shooting subject wise is forest scene walking on a trail in the pacific northwest. I've tried using AEL lock at times and it helps " a little " but I cannot get 2 minutes if my life depended on it. Zooming the lens also kills the recording.
Click to expand...
Very nice footage, here's a few tips:

* OIS is ok, but turn off all-exposure features. Shoot in Manual Exposure Creative Movie Mode.
* Make sure the white snow is not over-exposed, try shooting one-stop underexposed.
* Don't zoom during a take, the electronic 14-140mm zoom will bog down the camera CPU.
 
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