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Davide DB

Member Since 30 Nov 2010
Offline Last Active Apr 13 2014 10:24 AM
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#323624 Hints and Tips with Panasonic GH2 filming

Posted by Davide DB on 01 January 2013 - 11:29 PM

Hi Kun,

yes, flow motion v2 looks like nice hack, it is quite popular I would say. I got 64gb 90mb/s SD card, so thats also not a problem.

Yeah, thats what I want to confirm - Manual Mode, HBR, 24p cinema.

Magic filter with lights ? I used them before, when I didnt have lights, but now I dont think I need magic filter.

Can you also tell me your settings for FN buttons?


I have the same setup as you plus 8mm fisheye and dome and Fix Aquavolt 3500.
I do not use FN.

Fully manual, FM 2.02 Hack in 24p Cinema Mode. On extremely detailed and well lit subjects there is some difference between HBR and 24p Cinema mode. I prefer the 24p cinema mode but maybe I'm just a pixel peeper Posted Image

Do not use AFC but exclusively AFS. I use a lot the AF Lock toggle. I found that center weighted AF (the one with the [*] symbol) is absolutely better that multi point AF. I ruined several shots with that. Expecially with the 8mm fisheye with a very narrow aperture (> f8) the lens can focus dust or shadows on the dome. So IMHO the way to go is:

- Center weighted AF;
- Narrow aperture >= f8 trying to be hyperfocal;
- Prior of the shot you focus and lock with the AF lock button;
- you start recording;

If light it's not enough to get a correct exposure, bite the bullet and increase ISO Posted Image I got decent shots (for my taste) up to 1600. Actually noise perception is a personal taste.

Last but not the least, remember that GH2 has something like a bug on ISO settings. An ISO setting of 320, 640, or 1250 may result in increased noise depending on the camera's previous setting. To avoid this, switch the camera to the ISO setting 1/3 stop higher, and then back down. (i.e., 400 to 320, or 800 to 640, or 1600 to 1250). If you turn the camera off while in ISO 320, 640, or 1250, you must repeat the ISO switching after turning the camera back on to avoid higher noise.
Set the film mode to Standard with -1, -2, -2, -2. Adjust contrast and saturation as necessary.

Have fun Posted Image
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#321045 SS VALSAVOIA - a quick tour

Posted by Davide DB on 20 November 2012 - 11:15 PM

My latest effort underwater.

There's no banding in the original footage :D

The Steam Ship was built and launched as ROSOLINO ORLANDO in 1919 by the "Società Esercizio Bacini of Riva Trigoso" for the "Industrie Navali Società Anonima" (INSA) of Genoa. In 1923 she was renamed VALSAVOIA.
She was 5.733 tsl with a length x breadth of 117.60 x 15.70 m.
The SS VALSAVOIA, was torpedoed and sunk by HMS SAFARI on February 2nd 1943, while traveling from Naples to Palermo,10 miles West of Capri island near Positano.

The wreck lies under 85m/ 278ft of water in upward position.
_____________________________________________________________________________________

Shot on a Panasonic GH2 + Lumix 7-14mm loaded with Lee Powell’s Flow Motion 2.02 settings; Nauticam Housing, 2x FIX Aquavolt3500 lights and 2x 50W HID Yellow Diving.

Music: Dandi + Mattanza + Bologna from the soundtrack of "Romanzo Criminale" by Paolo Buonvino.

Edited on Edius 6.07 + Canopus Imaginate 2 dor the animated chart

[vimeohd]53775747[/vimeohd]
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#319713 Grass Valley codecs now available to non-Grass Valley applications

Posted by Davide DB on 02 November 2012 - 06:03 AM

I saw that GV released its canopus codecs pack for Apple too.

Bye


#318901 Posta Fibreno lake

Posted by Davide DB on 23 October 2012 - 01:28 AM

The lake of Posta Fibreno, is located by the village of Posta Fibreno, a small council of the Frosinone area in the Lazio Region. The lake is in a karstic terrain and rich in underwater springs.

Waiting for clearer water in winter time I edited some test shots filmed this summer.
In this period, warmer, slower moving waters increase the production of algae and allow it to accumulate in large blobs covering most of lake vegetation. Underwater shots are almost completely ruined by this mucilage, that constantly sticks to the port.
In the opening shots I got the front lens writing caught on the port. I have to put some black tape on it. Shame on me! Posted Image

We will be back in water in January with a gin clear water.

For now, just a taste of this wonderful place.

Shot on a Panasonic GH2 + Lumix 8mm & 7-14mm loaded with Lee Powell’s Flow Motion 2.02 settings; Nauticam Housing.


[vimeohd]51504827[/vimeohd]


#316989 Black Magic Cinema Camera

Posted by Davide DB on 23 September 2012 - 02:11 PM

Davide,
Thanks for those most recent links. I will pass them on. I really found them interesting and, in a discussion yesterday with someone, we talked about how it was actually fun to learn more and more about this BM cam finding the good and the bad. Remember that this is a first generation cam so there should be improvements down the line.


I came across this comparison between 5DMK3 and BMC. They are compared for "dynamic range, sharpness, pushing levels, banding, artifacts, rolling shutter, chromakeying, wide/telephoto lengths, DOF (depth of field), low light, macro blocking, contrast, and more"

From what I understand they tried to shot in challenging conditions trying to see the camera limits. Maybe I missed something because the clips from the 5dMKIII are the ugliest I've seen so far. Really strange.

I suggest to see fullscreen and reading the video desciption.

[vimeo]49875510[/vimeo]


#316772 Video and a Stable Platform - Gyros or DPVs?

Posted by Davide DB on 20 September 2012 - 01:41 AM

Modified frog or modified shuffle kick is the way to go for filming while swimming.
Anyway you have to exercise you video skills a lot to obtain a steady hand. Of course a nearly perfect setup is a good starting point Posted Image

A DPV is a better choice for filming cave and wreck diving. Despite of the added difficulty of using a scooter in a cave environment (maybe a proper scooter cave training is a must) it adds a lot of stability.

The key point is getting a perfect trim and buoyancy of the entire setup. The best option is trying to have both camera setup and scooter+mount separately neutrally buoyant . If for some reason you have to remove the camera from the scooter mount you still have a working/manageable scooter. Sometimes it's hard to achieve and mainly depends on the camera setup.

A suggestion for tech dives: evaluate carefully the buoyancy system. I was so stupid to use Stix floats in a 80m+ dive. On the box neither on their web site they specify the max depth and it was my fault to not investigate. I used them a lot of times above 45m but below they became like chewing gum and it's a PITA finding yourself at depth with a heavy scooter and camera and a lot of deco on your back... Once crushed they need some hour to return to the original shape.
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#316589 Panasonic GH3 is (almost) here

Posted by Davide DB on 17 September 2012 - 07:27 AM

As usual guys at P-V are a step ahead when dealing with Panny.
They "sent" a couple of guys at Photokina covering the Panasonic event. The reported back the event via twitter and there is a wiki page:

http://www.personal-...na/coverage/gh3

Or you can just go on Panasonic Photokina press site:

http://www.panasonic.eu/photokina2012/

Or plain GH3 site:

http://panasonic.net...camera/gms/gh3/

Fro video recording formats here the various features:

Posted Image


#316339 Bitrate for home/online reproduction

Posted by Davide DB on 13 September 2012 - 12:03 PM

Hi Steve,

Everything went good, as all vacations, after all Posted Image

Thank you for point me out your article. It's nearly the same work-flow I use with Edius. Except using 10M for 1080p and I'm satisfied with the results.
My question on Vimeo arises because I found several people who use higher bitrate for Vimeo and they states that the final quality is better... The ratio behind this is since Vimeo compresses the material one more time after upload, you will get better quality if you have a higher bit rate to start with.
Hummm... I wonder if this is true and if someone has tried.

Just as example I found this comment on Vimeo:

https://vimeo.com/fo...comment_4440398

He is referring to an Howard Hall video which is only 386MB while being of extreme quality. Ok: he is HH, he is using a Red camera and blah blah blah... but downloading his original file:

Well I answered my own question regarding the Howard Hall video. I downloaded the original source file. It was variable bit rate, dropping down to 9 Mbsec in the simple scenes and spiking to over 26 Mbsec in the complex scenes.



On the other hand, what is the maximum bitrate I can use for home viewing? Or better saying which bitrate is worth using? At home I have a Samsung tv with an integrated media palyer and a db plyer. Both reads H.264 files..

Thank you in advance


#316319 Bitrate for home/online reproduction

Posted by Davide DB on 13 September 2012 - 06:34 AM

Hi guys,

Just playing with H.264 export with my NLE.

What's the best bitrate for H.264 1080p export to play on a media player/ps3/smart tv?
Is it the same max bitrate supported by BD?
I'm not planning to burn a DB but just a single H.264 file.

And speaking about exporting for Vimeo...
Their guidelines suggest 10Mb for 1080p and 5Mb for 720p.

Do you usually comply with these values or you export higher bitrate for Vimeo?
I saw that they accepts higher bitrate but I was not able to spot if this leads to a better quality.

Bye


#315560 Black Magic Cinema Camera

Posted by Davide DB on 30 August 2012 - 02:40 PM

Some spam:

http://nofilmschool....ra-in-low-light

Frankenstain vs Dracula (FS100 vs BMCC)

http://nofilmschool....-light-showdown


#313551 Any thoughts about this light?

Posted by Davide DB on 25 July 2012 - 11:53 PM

Given that this thread has been hijacked... Posted Image

Speaking about monsters, there is also this Sartek led light head rated 10000 lumen, very expensive indeed:

http://www.sarind.co...rod=LED10000VW.
I've seen a couple of cave videos where the model was using this head:

You can skip to minute 2:50

[vimeohd]36657225[/vimeohd]


#313550 Macro shooting in bright condition

Posted by Davide DB on 25 July 2012 - 11:40 PM

Macro shooting at 70m depth? :)


#308675 Anyone making a hard cover for the ZEN 9"

Posted by Davide DB on 13 May 2012 - 02:21 AM

Same method here,
justa dd a couple of stickers and you a pro :D

Posted Image
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