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About rimpamposh

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  1. I'm surprised the samyang 24 is smooth, my 85 is rubbish, which is why i wasn't tempted on picking any more of these (also large). Now, the contax lenses, very smooth.
  2. Ok, all clear now. There's just one thing left: why isn't 0-255 displayed correctly with all the range, why is it clipped? And how can we fix this?
  3. Interesting, thanks. Btw, my question was how to save the file on computer? I have an mp4 file. How do I proceed to get that image file? (I know how to use programs, just want to know your way of doing this image acquisition that saves all the 0-255 information for sure, the color range thing confuses me slightly, as seems the case with most).
  4. Thanks. KarimNassar, in your bandingcomparison you said "save file and open in Photoshop". What exactly do you mean? Save file in what program? Grab frame in premiere pro or other method? Thanks.
  5. Pavel, how do you do this conversion in premiere? I looked through it quite a bit but can't find anything (I'm a premiere noob).
  6. Some prores files would sure be nice. But my personal impression is that external vs internal won't be a big advantage because of overdone and poor processing done to the video in camera before output. Now I only have nx500, so maybe quite the same doesn't apply to nx1, but live view is heavily denoised, which leads to most of our problems like banding after encoding and blocking bigger than you'd want (60mbps for 1080p24 should be pretty damn great yet after iso100 everything crumbles). Btw, can you compare live view clips vs recorded clips in record mode? Might be a difference in manipulation. As to color range, there are some very useful posts here about nx500's 0-255: http://***URL removed***/forums/thread/3933332?page=3 The conclusion seems to be that 0-255 for video is kind of a novelty and basically not properly supported yet by codecs and programs. Unfortunately I don't have an nx1 to make a test. What would be interesting is a clip 16-235 vs exact same scene with 0-255 remapped to 16-235 in ffmpeg or avisynth or wherever. About denoising before grading, could be a good idea, but depends in what color depth premiere makes the calculations. In 8-bit it will enhance the banding easily, in 16-bit should be ok-ish. Now a good workflow before grading on nx500 would be: avisynth convert to 16-235, dfttest in 16bit hack mode (denoising, select strength as needed), gradfun3 (debanding, use strength 0.8-1.2 as needed) with 16 bit input and 8 bit dithered output, save lossless in virtualdubmod. Grade in wherever like premiere, add some type of grain (like gorilla), this will cement the no-banding look. Export lossless, encode in x264 with proper settings for the grain (don't want to use premiere output if you care about quality).
  7. So, the smart range on gives at leas 1/2 stop advantage in the highlights. Fairly useful but hard to say if it's better than underexposing and doing stuff in post (it totally should because this step is done before encoding in camera, not after). However when shooting in 1080p I noticed a severe lack of detail at iso 400 (not that high) compare to the 640 of the smart range off. I'm still investigating. But I was surprised how bad 1080p looks on nx500. Anything above iso 100 is smeared to hell and blotchy noise also present. Considering my test was static, at 60mbps it should absolutely not be an encoding issue, but very poor processing (unless the processing is really that poor, I mean the stream is formed of one I-frame followed by 11 (ELEVEN) consecutive B-frames. Someone at Samsung forgot about P-frames, 11 consecutive bframes is a serious problem, anything above 2 is only for low movement that is properly dithered). Does anyone have any 1080p NX1 footage at iso 400 to 1000 or so and can upload? I have a feeling the video processing on nx500 is pretty damn bad.
  8. Wait, which video? I can't see anything. And Micah Mahaffey's video seems fine to me, that panning in the beginning isn't bad at all (viewed on youtube is not so easy to judge though.).
  9. The jerky motion could be caused by lens stabilization, especially since you say it's not dependent on shutter speed. As for the sharpening, that is kinda the normal behaviour of simple spatial sharpening. If you take a blurry picture and apply x amount of sharpening, the effect seems to be small. Take a sharp picture and apply same sharpening and the effect seems very strong. Therefore the jerky motion + sharpening will accentuate the jerkiness even more.
  10. Well, since there is basically no useful info on the net about video smart range on these cameras, I made a quick test with my nx500. Basically the exposure is lowered by about 0.4-0.6 stops. So let's say I set shutter to 1/50. With dr on I get iso 250, with dr off I get 400. Now there is something odd about its behaviour. With dr on the clip starts darker but it gradually gains brightness, in about 5 seconds to about the same brightness level as dr off. A bit brighter even I'd say based on my 2 quick tests. But the highlights gain less brightness than the rest. Based on my initial impression you get a bit flatter image, and I haven't noticed any bad side effects. I didn't test in challenging conditions that might create banding (so the question remains if this method is better than reducing contrast or not). This is with nx500 which doesn't have gamma dr. I wouldn't write it off just yet, may be pretty useful for nx500 users.
  11. Well, it would be lower ISO, but not same brightness. You would still need to midtone/shadow expose the nx1 after by 1 stop or more and lower the GH4 overall. Now, if the shadows in nx1 would hold well to this afterexposing, that should give the nx1 a dynamic range advantage. Not sure that can be counted on, but with some denoise/regrain, you can achieve a pleasing image still.
  12. Hello. I registered here since i finally have a camera that might be able to do decent video (nx500). So this is a very interesting topic for me. Nice work ricardo_sousa, some of the best stuff I've seen on nx1 if not the best (still the blacks are maybe a tad too washed). Are the deluts coming in rec709 version as well, I thought they come only for log? From what I've seen the nx1 has a problem of oversharpening. They should have included a 0 sharpening option. If you downscale properly from 6.5k it's not good to add sharpening. Adding any to a perfectly detailed image will only have downsides with no benefit (and it will show up really fast). But I think this can be solved if downscaling to 1080. Bicubic is a very versatile scaler since it has 2 tweakable parameters (you will get exactly how sharp or soft you need it to be). I strongly suggest people to try it (http://avisynth.nl/index.php/Resize#BicubicResize). Another idea if you want to keep 4k would be to upscale with something like nnedi (almost no added ringing when upscaling) and than custom bicubic back, the results should be very different than adding blur.
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