GH4 Panasonic GH5 coming in 2017

And now there's a "custom made" recorder for GH5 - Ninja Inferno (don't sprout any more new threads though)
 
My GH5 just shipped, so I should have it in hand Monday :) My first task will be running through the picture options to figure out the most dynamic range. From there I'll begin testing with charts etc for my LUT. Excited!

Cheers,

Paul :)
 
If I record 24p instead of 30p, am I getting a better image because it is the same data rate but fewer frames per second?
 
Paul F said:
If I record 24p instead of 30p, am I getting a better image because it is the same data rate but fewer frames per second?
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In theory, yes :) But it depends on where Panasonic decided the encoder cutoff should be too, so it's a touch more nebulous than a simple maths calculation.
 
Paul F said:
If I record 24p instead of 30p, am I getting a better image because it is the same data rate but fewer frames per second?
Click to expand...
That is not as easy as it sounds to answer, for a number of reasons:

1) You're not using an intraframe codec, you're using an interframe codec. So it doesn't encode the frames, it encodes the changes between frames. With 24p there are fewer frames, but the amount of difference between each frames is more than you'd likely find in 30p. So 30p is more frames, yes, but fewer changes between frames. So it may net out the same.

2) You're not using a constant bitrate codec, you're using a variable bitrate codec. So you can't know what the bitrate will be anyway -- it all depends on the scene complexity. The more complex the scene, the more bits that will be needed to encode it, regardless of how many fps you're shooting.

3) The bitrates are all nebulous anyway. It's almost impossible to get a 100mbps long-GoP codec to actually use 100 mbps. Same for the 150 mbps. It'll use what it needs. Generally, what I find with these codecs, is that 60p does take up the most space, and 30p and 24p take about the same amount of space, which is generally less than what 60p takes up.

4) Even the all-intra is not what you think. You are not going to get a 200mbps file if you're shooting 200mbps All-Intra at 24p. In the all-intra, it's still variable bitrate, and even though the encoding per frame stays about constant, the fewer frames of the slower speeds will result in a lower bitrate. 24p in "all-I 200mbps" will generally use under 80 mbps. 30p in "all-I 200mbps" will generally use under 100 mbps.

So - no. No easy answers.
 
The GH5 doesn't of seemed to of fixed the HDMI lag in 24/25/30 modes, only way to get it 'lag free' is the same as the GH4 - run it in 50/60fps....
 
Barry_Green said:
That is not as easy as it sounds to answer, for a number of reasons:

1) You're not using an intraframe codec, you're using an interframe codec. So it doesn't encode the frames, it encodes the changes between frames. With 24p there are fewer frames, but the amount of difference between each frames is more than you'd likely find in 30p. So 30p is more frames, yes, but fewer changes between frames. So it may net out the same.

2) You're not using a constant bitrate codec, you're using a variable bitrate codec. So you can't know what the bitrate will be anyway -- it all depends on the scene complexity. The more complex the scene, the more bits that will be needed to encode it, regardless of how many fps you're shooting.

3) The bitrates are all nebulous anyway. It's almost impossible to get a 100mbps long-GoP codec to actually use 100 mbps. Same for the 150 mbps. It'll use what it needs. Generally, what I find with these codecs, is that 60p does take up the most space, and 30p and 24p take about the same amount of space, which is generally less than what 60p takes up.

4) Even the all-intra is not what you think. You are not going to get a 200mbps file if you're shooting 200mbps All-Intra at 24p. In the all-intra, it's still variable bitrate, and even though the encoding per frame stays about constant, the fewer frames of the slower speeds will result in a lower bitrate. 24p in "all-I 200mbps" will generally use under 80 mbps. 30p in "all-I 200mbps" will generally use under 100 mbps.

So - no. No easy answers.
Click to expand...
BGPHQIS stands for Barry Green posts high quality information standard. Stick it! (E :-)
 
Illya Friedman said:
Or even better... if you want V-Log (or anything else for that matter) you could support a company that is intimately involved with the development of the Panasonic GH cameras for many years, and continues to be- and is in many ways at the bare minimum at least partially responsible for many of the GH4/GH5 features you love.

http://hotrodcameras.com/no-categor...ation-code-for-dmc-gh4-dc-gh5-and-dmc-fz2500/
Click to expand...

What Hot Rod Cameras says. Thanks Illya. :thumbup:
 
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