Tagged with modes - Personal View Talks

GH2 - MJPEG resolution findings and Myth Busting

duartix — Wed, 25 Jan 2012 20:07:41 +0000

Tackling MJPEG for 2fps timelapses, I drew some conclusions that are less than obvious, and that I feel that should be shared with the rest of the community.

For this I filmed a resolution chart on my computer screen from a distance, using Quantum 50-100 settings which use quality settings that are already over the line for 2fps be it AVCHD or MJPEG. I loaded the MOV files into AVIDemux and extracted 100% lossless snapshots to compare the various modes. Shot on M Movie Mode, aperture and shutter speed were both fixed.

Note: I'm only showing the relevant 100% screen captures but all the files generated in this test (and I tested both HD and VGA modes) weight in at 38.5MB and can be d/l here: http://www.mediafire.com/?u2h8ycc2c6vmj0a

Unless marked as AVCHD all other files are MJPEG.

Myth 1 - MJPEG 1080p is MJPEG 720p up-scaled.

Result: Plausible.

It's too close to call, really! Even though there is evidence of a very very small resolution advantage to 1080p, it is hardly noticeable and it could be a consequence of the input-output workflow of 720 being done in a smaller resolution.

Evidence: (look at the second image, I can't delete the first which is similar)

Why people on a budget are not using the GH2?

JuandiAznar — Sat, 16 Apr 2016 17:49:43 +0000

Hi everybody. First of all I would like to thanks Kiselev for his amazing work and Driftwood, who developed the patch I use. I start this topic as a conversation table, maybe kinda philosophic. I was using a Canon 600D but dirty look and incredible banding frustated me everytime (even being more a content guy that technic super sharpness/film look guy) The thing is, I grabbed a mint Pana GH2 with kit lens with less than 4.000 actions for 200 euros. This camera amazes me. Yeah, yeah, I know, 8 bit 4:2:0, but to me is a STEAL for 200 euros. It just have a very nice VIBE, a great noise pattern that doesn't bother me that much, a dynamic range that it's just ok and the amount of sharpness necessary (even with kit lens). To me, the camera is a tool, I paymore attention to my histories, so, if a camera just do his work for a little money, it's very ok. The thing is that this camera is a gem, don't know why filmmakers on a budget like me doesn't get this stuff for that little money instead of Canon Txi, I think it would be like my case, mainstream opinions makes you buy the Canon (it's true that they got their advantages like sensor, colour gammut...) GH2 it's just awesome.

Simply I wanted to thank the people who developed the hack and the patches and say to the world how much I like this camera, it's unique, go grab one and feel his vibe.

Greetings.

Hacking GH2 film modes

lolodigital — Wed, 18 Apr 2012 02:38:31 +0000

Apologies if topic already discussed... As a new challenge for pool development, is it possible to hack film modes to get own ultra-flat "log V (vitally)" Picture profile, and with hight bit-rate combination to get real cinematic color scheme, and get a real big improvement of dynamic range (lets dream about 12 stops)?