Settings for GH2??

OGUL wrote on 7/13/2011, 1:22 PM
Hi all,
so far I was using Sony HC9E, 25 Mbps for burning BD's.
The quickest and easiest way with Vegas.

Just in order to have blurred background and be able to make selective focus I bought GH2.
Lenses : 7-14 mm / 14-42 mm / FD 50 mm 1.4 / FD 70-210 mm f.4 /
Summicron-R 50 mm 1.8 / Elmarit-R 180 mm f.2.8

So, what are my possibilities / choices?
The way(s) that I should follow?

a - To use GH2 as 1920 x 1080 50i and hack as 25 Mbps??
b - Hack it as 100 or 50 mbps and then convert as 25-27 mbps
when necessary with something like AVCHD Upshift??
(Not sure if my Vaio will be sufficient for it.)
c - forget about HC9E and make everything with GH2

Any ideas please.

Thanks in advance.

Comments

CClub wrote on 7/13/2011, 3:33 PM
Whoa... slow down, cowboy. The hack is just initially coming out... I'd recommend waiting until that's settled in a bit before risking either your work or camera.
Sol M. wrote on 7/13/2011, 4:41 PM
The GH2's default encoding is very good. Are you getting codec breakdown in your shooting? If not, don't worry about the hack for now and just shoot, edit, and burn to BD just like you already were.
GJeffrey wrote on 7/14/2011, 1:22 AM
Your HC9 records HDV using Mpeg 2 codec. The GH2 records HD using avc/h264 codec.
You can't compare their respective bitrate.
Roughly, 25Mbps mpeg is equivalent (in term of quality) to 12/13Mbps with avc.
Don't hack your GH2, it's not necessary.
OGUL wrote on 7/14/2011, 2:47 AM
Thank you for your replies.

Jeffrey, the information you gave me completely new for me!
I didn't know it before!
Special thanks to you!

I love this forum:)
musicvid10 wrote on 7/14/2011, 10:16 AM
@GJeffrey,

That 1:2 bitrate comparison for AVCHD:HDV gets bandied around a lot, but it is pretty optimistic, especially when there is detail in motion.

My own tests (and those supported by more conservative estimates) conclude that 16-18 Mbps AVCHD is a good quality match for 25 Mbps HDV at the same relative resolution and subject matter. Worth noting is that most consumer AVCHD cams shoot that as their default bitrate.
GJeffrey wrote on 7/14/2011, 6:33 PM
Musicvid,
Thks for your precision.
I'm pretty sure that it also depends a lot on the camera you use. A consumer AVCHD cam at 24Mbps gives a worse result than a pro cam HDV. at 25Mbps.