MJPEG high bit rate footage-stills & comparisons.

The other thread moves so fast I always feel a few steps behind. I understand the images here much better than the numbers in the other thread :)

It would be greatly appreciated if Mr. Pappas could give us some plain-english summary of the settings used and the compromises/limitations (if any) involved. I'd be happy to do some tests as well but I'm feeling at a loss for where to start. I've used the PTool already, so I get the basic idea, I just mean specific settings and such. 5D is my main camera for now so I feel okay about experimenting with my GH1.
 
Nice pics Pappas... But what I'm seeing in the comparison is the MJPEG looks smoothened over like it went through noise reduction. The 17Mbps AVCHD looks like it has more detail in the image where the MJPEG looks cleaner and sharpened.

Or is it just me...??
 
If you're testing 24p, please incluse motion in the shot, otherwise you,re never gonna know if the clip look smooth or not.
 
Easiest way to test 24P is to put camera on tripod and pan smoothly from left to right or right to left. If you see a jump in the cadence you'll know immediately that's it's just 30P with a dropped frame.
 
Ian-T said:
Nice pics Pappas... But what I'm seeing in the comparison is the MJPEG looks smoothened over like it went through noise reduction. The 17Mbps AVCHD looks like it has more detail in the image where the MJPEG looks cleaner and sharpened.

Or is it just me...??
Click to expand...

It's the high bit rate that retains the smooth tone of the GH1. The GH1 has an excellent sensor that the low bit AVCHD was never retaining. Just look at the stills from the GH1 on photo boards. It can produce stunning results. Mjpeg at 60Mbits is a lot to be throwing at a 720P image that comes off a large 4k image sensor. It's quite awesome to see....

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The test scene at http://www.youtube.com/watch?v=dPle0FnHJ7U seems to me to be a very good sort of scene to make comparisons. Passing vehicles at a likely-to-be-consistent speed, grass, patterns on buildings, etc etc. Panning to produce motion is too hard to do at a constant speed.

But to make panning more consistent, one could push some sticks into your back yard at intervals such that you'd pan across each stick at the rate of one per second (say). Then keep an eye on the GH1 time display relative to which stick is passing in the frame.
 
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Did filming today. On this shot I only lifted the gamma just a bit. The high bit rate allows you to dig very well into shadows as last nights filming displayed too.

I have the 720P first. 2nd I upped the file to 1920x1080. 3rd, my favorite thing to do, blow up the image to see how far we can go.

This is for fun, and not scientific by any means. Oh, and I could kick my self, I forgot my long lens and used an alright one, However the right glass would have even made this better on all frames.

Original 720
1.jpg


Scaled up to 1920X1080
2.jpg


Zooming in more
3.jpg


Zoomed in
4.jpg


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Pappas, have you tried doing static shots of an object with high detail and comparing shooting 720 scaled to 1080 vs the in-camera 1080?

As well, if you have the ability to do so, can we get some 18mm Wide shots with high detail and buildings?

Looking forward to the new 1080/24P MJPEG footage.
 
Kholi said:
Pappas, have you tried doing static shots of an object with high detail and comparing shooting 720 scaled to 1080 vs the in-camera 1080?

As well, if you have the ability to do so, can we get some 18mm Wide shots with high detail and buildings?

Looking forward to the new 1080/24P MJPEG footage.
Click to expand...


Kholi, I tried the 1080/30 patch. It's definitely a bigger image that is scaled before encoding. However the Mbits are now less and you need to use a lower bit rate to avoid spikes that will stop recording. Anytime I moved into a frame that had a lot of detail it stopped.

As well, the 720 getting average of 60ish Mbits, is like 1080 at 120mbits. I like the smoothness of the high bit 720 vs a moderate mbit of 1080. I am going to try one more 1080 with a moderate bit rate to see if it's worth it. However 720 hasn't been a slouch. It's hard to complain with the quality that little GH1 is knocking out at 720 with this high bit rate.

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Pappasarts,

Your screen grabs look amazing. I've been doing some tests with the new firmware and nothing that I have looks even remotely close to what you are achieving. When I'm using the new Mjpeg my video looks incredibly noisy and the AVCHD in comparison is worlds better. Any suggestions?
 
Oedipax said:
It would be greatly appreciated if Mr. Pappas could give us some plain-english summary of the settings used and the compromises/limitations (if any) involved. I'd be happy to do some tests as well but I'm feeling at a loss for where to start. I've used the PTool already, so I get the basic idea, I just mean specific settings and such. 5D is my main camera for now so I feel okay about experimenting with my GH1.
Click to expand...

+1

I don't understand why the settings haven't been shared out yet?

(Edit… buried deep in previous posts)

NURBS has some great info every time he posts. On what settings were used. I think that they should be repeated every so often to make it easier.
 
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Robot2D said:
+1

I don't understand why the settings haven't been shared out yet?

(Edit… buried deep in previous posts)

NURBS has some great info every time he posts. On what settings were used. I think that they should be repeated every so often to make it easier.
Click to expand...

Well maybe not repeated every so often as this will just create more posts to rummage through - but perhaps consolidated in one place and updated every so often-possibly even a sticky?
 
Here are a few screen grabs with the following MJPEG patch:

Quality settings (E1 to E4) - 352, 220, 200, 184
Table settings (E1 to E4) - 24, 24, 24, 24

Quicktime reports 54Mbit/s. I'm shooting with stock 14-45mm lens. I have been shooting with this patch for a while now. No problems except the fact that you can't view the files in camera (doesn't freeze - just gives you a card error message).
I was going to shoot a comparison AVCHD movie but i ... forgot :(


1275923157.jpg

1275923339.jpg

1275923392.jpg
 
Agreed. I see a number of posts with various information and it's impossible to know which settings were used with with videos, etc. Maybe a sticky or updated first post (like Tester13's first post in the other thread) that keeps the current settings updated regularly.
 
slyn4ice said:
Here are a few screen grabs with the following MJPEG patch:

Quality settings (E1 to E4) - 352, 220, 200, 184
Table settings (E1 to E4) - 24, 24, 24, 24

Quicktime reports 54Mbit/s. I'm shooting with stock 14-45mm lens. I have been shooting with this patch for a while now. No problems except the fact that you can't view the files in camera (doesn't freeze - just gives you a card error message).
I was going to shoot a comparison AVCHD movie but i ... forgot :(
Click to expand...


Did you use the upscaling or 1080P settings as well or is this still 720p?

I think we need to standardize the information that is reported with vids or stills just so we know what works.
 
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