|
|
|
|
|
|
|||||||||
 |
|
|
Thread Tools | Search this Thread |
June 29th, 2012, 04:37 PM
|
#1 |
|
Major Player
Join Date: Nov 2007
Location: Stockholm, Sweden
Posts: 462
|
S-log, prores and noise
I just got my Samurai two days ago and have also upgraded my F3 to S-log capable 1.4-firmware.
Eager to try it out the first thing I did was to record a few shots in my office with high contrast and a lot of shadow at Prores HQ (220 mbit/s 10 bit). When playing back the images in my NLE I was shocked at the amount of noice in the image. Especially in the dark areas. The F3 with internal codec is super quiet with almost no noise at all. Where does this noise come from?! I could also see clearly visible macroblocking in one of the shots. Something I have never seen with the EX-codec!! Is something wrong with my samurai or is this expected from the "visually lossless" prores codec? Ola Last edited by Ola Christoffersson; June 30th, 2012 at 04:07 PM. |
|
|
|
June 29th, 2012, 05:44 PM
|
#2 |
|
Major Player
Join Date: Jun 2008
Location: melb.vic.au
Posts: 447
|
Re: S-log, prores and noice
Superblacks and Superwhites. 0-1023 instead of 64-940. It simply gets concatenated on playback. Also, Quicktime plays back in 8bit in 99% of apps out there.
I have no doubt the actual Samurai file is fine, just borked playback. I cannot wait for DNxHD, Quicktime playback and gamma issues are a real pain...
__________________
www.davidwilliams.com.au |
|
|
|
|
June 30th, 2012, 02:50 AM
|
#3 |
|
Major Player
Join Date: Nov 2007
Location: Stockholm, Sweden
Posts: 462
|
Re: S-log, prores and noice
I don't think that is the problem. I have control over White/black-levels. Using AMA in Avid all levels look correct in the waveform monitor. That would not explain the macroblocking either. I remember Allistair writing something about more noice in prores but was not expecting this.
|
|
|
|
|
June 30th, 2012, 07:20 AM
|
#4 |
|
Inner Circle
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,421
|
Re: S-log, prores and noice
Dear Ola,
I want to be very polite in saying this. Please test your F3 with a nanoFlash if possible. The nanoFlash uses the Sony XDCam 4:2:2 codec, at various bit rates from 50 Mbps to 280 Mbps, and they are all very low in noise. And, of course, our Gemini 4:4;4, being a true full uncompressed recorder is 100% free of added noise. The F3 + nanoFlash is just magic: the very low noise from the camera allows the nanoFlash compression engine the opportunity to devote all of its power on compressing the image since it does not have to deal with noise. But, please understand that we do not recommend the nanoFlash for recording S-Log. We recommend the Gemini 4:4:4 for use with the F3 when using S-Log. Besides being full uncompressed, it is 10-bit, and has full support for S-Log, including a built-in LUT, for ease of viewing the images on set, on the built-in monitor or via an external monitor.
__________________
Dan Keaton Augusta Georgia |
|
|
|
|
June 30th, 2012, 05:09 PM
|
#5 |
|
Major Player
Join Date: Jun 2008
Location: melb.vic.au
Posts: 447
|
Re: S-log, prores and noice
All editing software I have knowledge of, including Avid, requires Superwhites to be specifically enabled per project or sequence, sometimes per clip.
If you haven't set that yourself, then your not seeing the full range, and it does look awfully like noise. I've even had this same issue with large international post houses. Even if I'm wrong in your specific instance regarding the noise, it really is worth you investigating just to get back the extra detail your throwing away.
__________________
www.davidwilliams.com.au |
|
|
|
|
| ||||||
|
||||||
|
|
