GF1 low-light video recording

Lpowell

Veteran
On the GF1, video recording is restricted to 720p at 30fps. In addition, only Program Movie Mode is available; the GH1's Manual, Shutter, and Aperture Movie Modes cannot be selected. However, the Auto Exposure Lock button does function in the GF1's Program Movie Mode, and videos may also be taken in M, S, A, and P photo modes, just as with the GH1.

I have the Lumix 20mm f1.7 auto-focus lens, as well as Canon FD 50mm f 1.4 and 85mm f1.8 manual-focus lens. I'd like to determine the best camera settings for producing HD video in low-light conditions. Here's what I've come up with so far.

I use the MJPEG codec at 720p and remove the duplicated frames in post to produce 30p video. The scenes I film are typically lit by incandescent or stage lights, and to my eyes, low-light videos look best in the GF1's Nostalgic Film Mode. To minimize underexposed sensor noise, I set Contrast -2, Sharpness -2, Color 0, and Noise Reduction +2.

At 30fps, a shutter speed of 1/30 second gathers the most light without producing stop-motion effects. The GF1's Program movie mode, however, doesn't let you set or even observe the shutter speed while you compose your shot, and the preset AUTO exposure mode doesn't reveal the ISO setting either. Even when you use the AE Lock button, there's no indication of what shutter and ISO settings the camera is using during video recording.

I've found a work-around that I believe allows me to control shutter, aperture, and ISO settings, and I'm wondering if anyone here can confirm that it does in fact work. The trick is to put the camera in Shutter-priority photo mode, where you can manually select both 1/30 shutter speed and your ISO setting as well. In this mode, aperture and focus on the Lumix 20mm lens can be locked down with the AE/AF Lock button, and all settings are displayed on the LCD panel.

When you press the movie button, the camera stays in Shutter-priority mode, but the LCD display switches into AUTO mode. However, it looks to my eyes like the camera actually uses your locked-down shutter, aperture, and ISO settings. I can confirm that the Lumix 20mm lens does not change focus during the video, but the other settings aren't displayed during or after video recording.

This technique does not work in Manual photo mode, because in that mode the AE/AF Lock button won't lock down your exposure settings. In practice, I find it convenient to use the spot meter to auto-set the Lumix 20mm lens aperture in Shutter-priority mode, the half-shutter-press to set focus, and the AE/AF Lock button to lock it all down.
 
Do you know now if hitting the AE/AF lock button lets you lock the shutter speed to the desired value ?
 
Hey Vitaliy, nice surprise ! Didn't want to bother you with such a basic question. That's why I asked here, in case I couldn't get my hands on a hackable unit.
Thanks a lot for your talent. Fingers crossed that Panasonic makes the new firmware available.
 
The trick is to put the camera in Shutter-priority photo mode, where you can manually select both 1/30 shutter speed and your ISO setting as well. In this mode, aperture and focus on the Lumix 20mm lens can be locked down with the AE/AF Lock button, and all settings are displayed on the LCD panel.

When you press the movie button, the camera stays in Shutter-priority mode, but the LCD display switches into AUTO mode. However, it looks to my eyes like the camera actually uses your locked-down shutter, aperture, and ISO settings. I can confirm that the Lumix 20mm lens does not change focus during the video, but the other settings aren't displayed during or after video recording.

Hi,

I know this is a very old thread but I had this page saved on my laptop amongst others to help me use my GH1.

I've just been playing around with shooting in Shutter Priority (S) mode but not in low light with my 20mm pancake.

I tested this against Video Creative mode to see what results I got. At first I noticed there was more depth of field with (S) mode than in Video creative mode.

I shot a flower at about 1 meter away from me.

In Video creative mode, to get white a histogram, these were my settings:
Aperture : 5.6
shutter : 50
ISO : 100

Then in shutter priority, just before hitting the video record button (pressing the photo button half way) it was giving me these settings:
Aperture : 4.5
shutter : i set to 50
ISO : i set to 100

So then to try and get the same look of shot in Video Creative mode i would have to use these settings:
Aperture : 4.5 (same as what it set itself to in shutter priority mode)
shutter : i had to change to 400
ISO : 100

So am I right in saying although you set you shutter in S mode to 1/50 once you press the red video button your shutter is NOT locked down to 1/50 but the GH1 is now changing it to (in the case) somewhere near 400.

I always shoot in video creative mode but was just testing this method out.

Sorry if this has been resolved in another thread. Could you please confirm if I am correct? Just trying to understand all the options within my GH1 a bit better.

Thanks
J
 
Also it's just occurred to me that when I used S mode my hacked gh1 locked which usually only happens with a high shutter speed. I use Ipowell 40mbps reliability hack.

Anyway.... I'll just keep shooting in Video Creative mode at 50fps as this is what has been stated long time ago.
 
So am I right in saying although you set you shutter in S mode to 1/50 once you press the red video button your shutter is NOT locked down to 1/50 but the GH1 is now changing it to (in the case) somewhere near 400.
I'm not sure if this works on the GH1 or not. I experimented with it on the GF1 months before Vitaliy and PTool gave us the ability to use Manual Movie Mode on the GF1. In the year since, many of the workarounds for dealing with the initial limitations of the GH1 and GF1 have become obsolete and fallen silently by the wayside.
 
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