http://www.personal-view.com/talks/discussions/tagged/band/feed.rss Tue, 30 Apr 24 08:22:03 +0000 Tagged with band - Personal View Talks en-CA http://www.personal-view.com/talks/discussion/693/gh2-showing-fixed-darker-bandstripe-20-pixels-high-across-footage Wed, 17 Aug 2011 17:19:56 +0000 sam_stickland 693@/talks/discussions
I'm using the settings below on my newly hacked GH2, and I'm seeing a horizontal band of darker pixels in my 24H footage. It's all the way across the image, completely rock solid at around 800 pixels down, and the band is around 40 pixels high. It doesn't move.

It becomes more and more obvious at higher ISOs, and is next to invisible below 400. The attached screen shot is from some ISO3200 footage, at f/3.5 on the 14-42mm lens. It's very noisy - I've drawn around where the bar is.

One thing to note is that I'm inadvertently using a Class 6 card (can't believe Sandisk write 20MB/s on the side of it, cheeky buggers!) so I often can't record for very low with these settings (Class 10 card is now ordered!). Would this really make any difference though?

I realise this isn't a methodical test - I've just gone straight ahead with a bunch of settings, if I get time I'll try enabling settings one by one and see which one causes it.

I'll edit this post to include a link to the .mts file once it's uploaded, the bar is easier to see on moving footage.

[Information]
Comment=1080p 66Mbps, 6 GOP, AQ=3, FB x 3
SD_Card=Any
Camera=GH2 v1.0E
[Settings]
Version increment=10
Video Bitrate 24H=66000000
Auto Quantizer for 1080 modes=3 - Most to details
1080i50 and 1080p24 GOP Size=6
1080p24 FB1=2350080
1080p24 FB2=2952069
1080p24 Frame Limit=23592960

[EDITED: This problem also existed on my stock firmware]]]>