GH1 firmware research volunteers required

[jobless]

Hi Tester13,
I got one question. Is it possible to have limiting bitrate adjustment but for static scenes. In other words, to push bitrate up when nothing change in the scene.
I noted that in scene with a tripod average size per p frame is 38976 kb with D settings and without patch average is betwean 40000 and 42000 kb,


and in the Hidetailed scene with movements is 195000 kb


Thanks

[tyampel]

Hi guys, just picked up my GF1 here in Japan (found a great deal, and Panasonic is even offering cash back!). Anyway, I'm ecstatic that there's a hack to change the interface language, and if it works I'll be more than happy to donate to the cause.

One quick question though: Which version of the firmware should I use the Ptool on: The Japanese firmware (camera was bought in Japan), or the English-language firmware? I didn't know if English would be included in the Japanese firmware, or if flashing with a different region's firmware would brick my camera.

Thanks!

As far as I know the firmware is the same for all regions and contains all languages.
It is just a setting that controls the default language and the Ptool patches that.

So load the firmware for GF1 and let Ptool sort it out for you by selecting English.

Good luck.

[Vitaliy Kiselev]

PTool 3.35 Updated without version change.

AVCHD bitrate adjustment patches fully ported to GF1.
Added three suggested values to help hints, so ordinary users do not need to search thread.
Video buffer top adjustment increased.

[Vitaliy Kiselev]

Hi Tester13,
I got one question. Is it possible to have limiting bitrate adjustment but for static scenes. In other words, to push bitrate up when nothing change in the scene.
I noted that in scene with a tripod average size per p frame is 38976 kb with D settings and without patch average is betwean 40000 and 42000 kb,
and in the Hidetailed scene with movements is 195000 kb

Please read my explanation of mud, it contains description why P frame sizes are small in static shots. We do not want to increase P frame sizes in static shots, but I frame sizes.
With time we'll understand AVCHD implementation better and, may be, will be able to do this.

[Vitaliy Kiselev]

Just started messing around with the MJPEG patches. Did the general MJPEG size patch get replaced by the restrained MJPEG 1280 > 1920 or am I missing something?

Yes, it is replaced.

[abasfly]

PTool 3.35 Updated without version change.

AVCHD bitrate adjustment patches fully ported to GF1.
Added three suggested values to help hints, so ordinary users do not need to search thread.
Video buffer top adjustment increased.

wonderful, I´m testing the c setting, (charging the battery) I was wondering if you knew the shutter speed in witch the pal GF1 records video (or is it arbitrary) with that I would be able to have an idea of the iso the camera is dialing.

this is a total game changer
thanks

[svecher]

PTool 3.35 Updated without version change.

Added three suggested values to help hints, so ordinary users do not need to search thread. Video buffer top adjustment increased.

These are very helpful. I see that Video Buffer c) setting is same as b) (40.000.000). Is that right?

[GrgurMG]

MJPEG 1080p

Just incase there was any doubt about it being upscaled 720p, I ran some some chart tests on the 1080p MJPEG mode. All stills are 1080 off camera or 720 smooth bicubic upscaled to match, then all images cropped back down to 720. Some of the tests were a bit redundant, for instance there was no expected change in AVCHD unpatched and patched, but it's there for posterity.

1) AVCHD 1080p Unpatched

2) AVCHD 720p Unpatched

3) MJPEG 720p Unpatched

4) AVCHD 1080p Patched
VidBuff: 40 VidRate: 32000000
OverRate: 35000000 Limit Rate: 40000000

5) MJPEG 1080p Patch (2 Takes)
MJPEG Size 1080 -> 1920
MJPEG Encoder 1080 -> 1920
MJPEG Quality: 720>512>428>400
MJPEG Table: 24>24>24>24

Zipped Stills:
www.jerseyforged.com/sampleclips/MJPEG1080/1080p_Compared.zip

When switching back and fourth you can clearly see the increase in sharpness/detail in the native/AVCHD 1080p shots... although the MJPEG pre-encode-upscaled 1080p is still a small magnitude sharper then the native 720p.

AVCHD 1080p vs MJPEG 1080p:



Mind you, the increased sharpness in MJPEG 1080 is a tradeoff with squeezing more resolution into a given bitrate. In this example, the abundance of test frame is low detail (as was most of what I croppped out) and the bitrate was set to "100mbps then stall" settings. So you expect to get sharper results, but with more jpeg compression in more detailed scenes. Even this shot clearly has more compression artifacts vs the AVCHD.

[testdasi]

Quick question guys.
I have a PAL GH1 and tried out the PAL -> NTSC patch. Now I'm repatching to latest version and want to do PAL, do I need to tick the NTSC -> PAL?

[tyampel]

Quick question guys.
I have a PAL GH1 and tried out the PAL -> NTSC patch. Now I'm repatching to latest version and want to do PAL, do I need to tick the NTSC -> PAL?

I would say yes. It won't hurt it in any case.

Good luck.

[Lexcalcin]

Quick question guys.
I have a PAL GH1 and tried out the PAL -> NTSC patch. Now I'm repatching to latest version and want to do PAL, do I need to tick the NTSC -> PAL?

I did it (GH1 pal from france) and it works in both cases, you can switch at will.

[John Caballero]

When you switch the camera to PAL you get 25 FPS NATIVE frames with no wrapper right? And the 720p goes to 50 frames which is easier to covert to 24p NTSC footage, right?

[sirk]

Just incase there was any doubt about it being upscaled 720p, I ran some some chart tests on the 1080p MJPEG mode. All stills are 1080 off camera or 720 smooth bicubic upscaled to match, then all images cropped back down to 720. Some of the tests were a bit redundant, for instance there was no expected change in AVCHD unpatched and patched, but it's there for posterity.

AVCHD IQ looks incredible compared to MJPEG. I'm getting ****ing crazy on this thread...

[drcoffee2]

GrgurMG

Great job on the test chart. I think you might have missed the AVCHD 1080p patched still out of the zip, or miss named the file, as it says MJPEG on the image. Cheers Jon

[GrgurMG]

GrgurMG

Great job on the test chart. I think you might have missed the AVCHD 1080p patched still out of the zip, or miss named the file, as it says MJPEG on the image. Cheers Jon

Erg, yeah I did, thanks. I think I had to do that one over again and I forgot to change the MJPEG to AVCHD.. the Mbps is right though ;)

Maybe I'll fix it when I get home.



----- Update ------

Fixed.