Cosimo Bullo
Veteran
peanutbutter - You're going to need to go back to some older posts about the hack concept in general, I think. The stuff being discussed in this thread is fairly specific to GOP1 and very high bandwidths.
GH2 Seaquake + Slow Motion Burst Patch for 95MB/s SDXC
- Thread starter Sage
- Start date
Sage
Well-known member
I've only used smooth -2, since the beginning. I think you may be referring to this post. I was responding to qwerty123, who was confident with his understanding of cinema. However, a few posts previous I wrote:
"The hacks do improve the banding significantly. Use smooth -2 for top quality roll off"
The situation is this; if cinema, whether because of the name, the in cam curve look, or the loss of the noisiest part of the DR, gives him more confidence to tell a better story, he should use it. When I was getting started in making movies with friends, I had no idea what color grading was, nor did I have access to the tools to do it. What the camera recorded to VHS is what we got. At that time, the more cinematic the image was on the screen, the more confident I was to tell a good story. Here cinema mode can be a godsend.
For those gearing up to shoot a feature that might end up on the big screen, cinema film mode has no place. I assume that a skilled colorist will be working with the footage, if not by the original team, then by the studio who buys it and will pay a colorist to present in the best light. In this case, cinema is a huge disadvantage, because the bottom noisy part of the dr is lost and the rest is next to black (which is not a good thing even with hacked avchd, banding) and the roll off to highlight is allowed to be rendered after the blue channel blows out (which causes a hard-to-remove yellow shift on overexposed areas). Smooth is a big advantage, as it lifts the shadow (with entire dr, noise & all) away from pure black, and applies a bit of logarithmic curve to roll off the highlight without shifting to yellow. It also retains accurate color. For a good colorist, it is a few clicks to make it look better than cinema mode ever could.
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Sage
Well-known member
About 30. For interviews, which have little motion, are well lit, and require a lot of consecutive recording time, you may be better served by going with a patch like CBrandin's 44. GH2-X is ideal for narrative fiction films which need continuous recording at highest quality 24fps, and equal quality slow motion at the expense of limited burst time for those slomo modes.
keep it moving Jay
Active member
GH2-X was removed from the patch vault on personal view, any issues Sage?
ed_lee83
Well-known member
Well, I just did a test with only seAQuake and got 4:05 minutes before spanning stopped. That equalled 4.29gb. So roughly calculating it would record about 30 minutes total.
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karapetkov
Well-known member
It is really great that you can record h.264 in intra mode, that's a huge boost. Kudos to all the people that have worked on these hacking projects! I will certainly be donating.
I think h.264/AVCHD also has a mathematically lossless mode, which is ~ the same as recording uncompressed. I wonder if the encoder can be set up to use that? Of course, it will be much heavier in terms of space.
Uncompressed 8bit 1080p at 24 fps comes at about 143 MB/sec.
http://www.digitalrebellion.com/web...0&frame_rate=f24&length=1&length_type=seconds
Uncompressed 720p at 50fps is slightly less.
(useful site, btw)
Lossless can shrink that to 60% and more, depending on the scene and lossless compression requires less CPU power - again, depending on the settings. I think that lossless AVCHD might be easier to encode than the other modes and that would be about 90 MB/sec. for 24 fps. So, if we can have 95 MB/sec. SD cards, I think it's possible.
Have you tried this?
If it's possible, maybe there won't be a need for external HDMI capturing.
Also, I wonder if we could also hack the SD card slot - connect an SSD or RAID to it with a custom connector and somehow "fool" the camera that this is an SD card. Lol.
rogar-BigGrin(DBG)
Get bigger storage, top speeds.
Whacha think? :happy:
I think h.264/AVCHD also has a mathematically lossless mode, which is ~ the same as recording uncompressed. I wonder if the encoder can be set up to use that? Of course, it will be much heavier in terms of space.
Uncompressed 8bit 1080p at 24 fps comes at about 143 MB/sec.
http://www.digitalrebellion.com/web...0&frame_rate=f24&length=1&length_type=seconds
Uncompressed 720p at 50fps is slightly less.
(useful site, btw)
Lossless can shrink that to 60% and more, depending on the scene and lossless compression requires less CPU power - again, depending on the settings. I think that lossless AVCHD might be easier to encode than the other modes and that would be about 90 MB/sec. for 24 fps. So, if we can have 95 MB/sec. SD cards, I think it's possible.
Have you tried this?
If it's possible, maybe there won't be a need for external HDMI capturing.
Also, I wonder if we could also hack the SD card slot - connect an SSD or RAID to it with a custom connector and somehow "fool" the camera that this is an SD card. Lol.
rogar-BigGrin(DBG)Get bigger storage, top speeds.
Whacha think? :happy:
Sage
Well-known member
Yes, VK wants the zip posted on there, with full description (no link to dvx). Part of the reason he started Pv was because he felt Dvxuser had connections to Panny and AF100 interests. I will repost when I have a chance.*
That is unfortunate. It seems that only the 64gb sdxc card will span, which is highest in cost. A similar effect was experienced with the difference between 8gb and 16gb on the 30MB/s cards. It must be a doubling of the signal path architecture in the card's connector allotment.
What 80% burst times are you getting at iso12800? That will give an idea of the card throughput. (shake the camera over the course of the shot for max codec stress)
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GH2-X. I like it. Count me in.
Now if only I wasn't sitting here on hold with the retailer.
ed_lee83
Well-known member
Not toooo bad for me I suppose, since I would only use it for snippets. I would use a lower rate hack for my standard commercial work.
What results would that 80% test yield that we don't know yet?
Sage
Well-known member
It would give a rough approximation of the card's speed (as opposed to the 64gb variation)
Just a few weeks back I was ready to throw down a **** ton of money for the Scarlet. Then I started doing my homework and realised that RED had over promised and under delivered (IMO). I mean, the whole windowing issue and that 1k resolution at 120fps...??
I then started looking into alternatives. FS100, AF100 and even the F3. I noticed that Ryan over at Scarlet User was get all excited about the GH2, so I thought I'd check it out again. And I have to say, why would I invest in anything more expensive?! This camera, apart from the fact that it doesn't have the functionality of a "dedicated" motion camera, is, well, kicking ass! The image looks comparable to an R1.
What these guys are doing is something truly incredible. They are doing what RED promised and failed to do. Give cinema quality images to monitory impaired film peeps.
So yeah, I'm getting a GH2 instead of a Scarlet. The money left over will be invested into a set of CP.2's... oh and a donation to these geniuses. I'm excited again
I then started looking into alternatives. FS100, AF100 and even the F3. I noticed that Ryan over at Scarlet User was get all excited about the GH2, so I thought I'd check it out again. And I have to say, why would I invest in anything more expensive?! This camera, apart from the fact that it doesn't have the functionality of a "dedicated" motion camera, is, well, kicking ass! The image looks comparable to an R1.
What these guys are doing is something truly incredible. They are doing what RED promised and failed to do. Give cinema quality images to monitory impaired film peeps.
So yeah, I'm getting a GH2 instead of a Scarlet. The money left over will be invested into a set of CP.2's... oh and a donation to these geniuses. I'm excited again
keep it moving Jay
Active member
Brilliant. Cp.2s are gourgeous! GH2 phenomenal. my 64GB sandisks coming in the tomorrow, major trailer shoot this weekend.
I think what panny did was pure accident: "yeah lets put a tri-core processor to show these other competitors and lets add this and that..." wow!!!!
I think what panny did was pure accident: "yeah lets put a tri-core processor to show these other competitors and lets add this and that..." wow!!!!
cowpunk52
Veteran
I've got two 64GB Sandisks arriving tomorrow, and I've got twixtor so I'll do my best to get something on line before the end of the week.
Ryan Farnes
Well-known member
Much appreciated Cowpunk!
roei z
Veteran
I'm all with you guys, but we still can't compare Red withThe Gh2 8-bit 4:2:0 limit... You must be aware of that..Just a few weeks back I was ready to throw down a **** ton of money for the Scarlet. Then I started doing my homework and realised that RED had over promised and under delivered (IMO). I mean, the whole windowing issue and that 1k resolution at 120fps...??I then started looking into alternatives. FS100, AF100 and even the F3. I noticed that Ryan over at Scarlet User was get all excited about the GH2, so I thought I'd check it out again. And I have to say, why would I invest in anything more expensive?! This camera, apart from the fact that it doesn't have the functionality of a "dedicated" motion camera, is, well, kicking ass! The image looks comparable to an R1.What these guys are doing is something truly incredible. They are doing what RED promised and failed to do. Give cinema quality images to monitory impaired film peeps.So yeah, I'm getting a GH2 instead of a Scarlet. The money left over will be invested into a set of CP.2's... oh and a donation to these geniuses. I'm excited again
karapetkov
Well-known member
The money left over will be invested into a set of CP.2's... oh and a donation to these geniuses. I'm excited again
Welcome to the club.
Why not get two GH2-s?
That way you can have:
1. 3D
2. HDR shots
...
(that's good enough, but maybe also have...)
3. (hypothetical nice surprise 1)
4. (hypothetical nice surprise 2)
rogar-BigGrin(DBG)
karapetkov
Well-known member
Pietro saw the light first...months ago...
True. And it was his GH2/Tamron stills on Scarletuser that made me take a closer look on the camera.
So, Pietro FTW!