@yan_berthemy_photography Posted February 18, 2019 Share Posted February 18, 2019 Hello there, I am getting artifacts issues in black areas when it comes to using V-LOG, I did expose my grey card correctly, around 45-50IRE screenshots below, some screenshots V-LOG version graded and zoomed at 300% Shot 4k at 10bit 150mbps as you can see, when grading with GHALEX DAYLIGHT, I'm getting a lot of artifacts while I exposed my shot correctly, do you think these are hot pixels or underexposure (shot in sunset) Thanks, kind regards. waiting for an answer. Quote Link to comment Share on other sites More sharing options...
thebrothersthre3 Posted February 18, 2019 Share Posted February 18, 2019 10 or 8 bit? Not sure if you are supposed to expose normally with the GHAlex lut. Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 1 minute ago, thebrothersthre3 said: 10 or 8 bit? Not sure if you are supposed to expose normally with the GHAlex lut. this is 10bit 4k 6 minutes ago, thebrothersthre3 said: 10 or 8 bit? Not sure if you are supposed to expose normally with the GHAlex lut. @thebrothersthre3 This was shot 4k at 10bit 150mbps Quote Link to comment Share on other sites More sharing options...
thebrothersthre3 Posted February 18, 2019 Share Posted February 18, 2019 Post in the GHAlex thread, Sage who made the LUT responds directly there Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 Just now, thebrothersthre3 said: Post in the GHAlex thread, Sage who made the LUT responds directly there @thebrothersthre3 having another question, what about refreshing pixels on the GH5? do you think this is an issue from the sensor itself or from my exposure? I'm getting magenta pixels... Quote Link to comment Share on other sites More sharing options...
mnewxcv Posted February 18, 2019 Share Posted February 18, 2019 re you referring to the red dots? I don't see what the picture after that shows. Do the dots move as the video plays? Can you take another video and see if they are still present? Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 7 minutes ago, mnewxcv said: re you referring to the red dots? I don't see what the picture after that shows. Do the dots move as the video plays? Can you take another video and see if they are still present? no, does not seems to move with those dots, I'll send you a video Quote Link to comment Share on other sites More sharing options...
thebrothersthre3 Posted February 18, 2019 Share Posted February 18, 2019 Those red dots show up in your footage? Seems like a sensor defect not an issue of pushing the footage too far. Quote Link to comment Share on other sites More sharing options...
mnewxcv Posted February 18, 2019 Share Posted February 18, 2019 also it may be obvious to some, but I have no idea what camera you have. Please specify. To me the red dots looks like hot pixels. Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 15 minutes ago, thebrothersthre3 said: Those red dots show up in your footage? Seems like a sensor defect not an issue of pushing the footage too far. I don't have red dots in others profiles..., this is artifacting from V-LOG, I was just asking if you found this normal? here are some others shots I made in the middle of the day, let me know what you think: https://drive.google.com/drive/folders/1K9omRCU9-iqAZ5V28bVj-5NNx0dYvFfT?usp=sharing 1 minute ago, mnewxcv said: also it may be obvious to some, but I have no idea what camera you have. Please specify. To me the red dots looks like hot pixels. I use GH5 1 minute ago, mnewxcv said: also it may be obvious to some, but I have no idea what camera you have. Please specify. To me the red dots looks like hot pixels. do you speak about those pink dots in the trees? this is lens aberration and the purple bud in the trees Quote Link to comment Share on other sites More sharing options...
thebrothersthre3 Posted February 18, 2019 Share Posted February 18, 2019 Its not normal but I don't know why its happening Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 5 minutes ago, thebrothersthre3 said: Its not normal but I don't know why its happening @thebrothersthre3 what do you speak about, the red dot? this is the zoom feature in final cut pro 8 minutes ago, mnewxcv said: also it may be obvious to some, but I have no idea what camera you have. Please specify. To me the red dots looks like hot pixels. @mnewxcv I use GH5. this red dot? this is final cut pro x zoom framing, this is not from the footage... Quote Link to comment Share on other sites More sharing options...
thebrothersthre3 Posted February 18, 2019 Share Posted February 18, 2019 Yes talking about the red dot Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 6 minutes ago, thebrothersthre3 said: Yes talking about the red dot @thebrothersthre3 this is not from the sensor, from my zooming software, to zoom 300% in the footage. what about pixels in my footage? any ghosting issues? attached screenshots with cine-v profile, less artifacts as you can see. 7 minutes ago, thebrothersthre3 said: Yes talking about the red dot here is a video I uploaded for you guys @thebrothersthre3 and @mnewxcv https://youtu.be/itBKa2uGnUM tell me if something shock you... Quote Link to comment Share on other sites More sharing options...
mnewxcv Posted February 18, 2019 Share Posted February 18, 2019 the red dot is the zoom tool, OKAY. That is what I wanted to know. The artifacts look like noise to me. Could it be that v log is disabling noise reduction and thats why you notice it? Hard to tell with just the screenshots shown. Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 15 minutes ago, mnewxcv said: the red dot is the zoom tool, OKAY. That is what I wanted to know. The artifacts look like noise to me. Could it be that v log is disabling noise reduction and thats why you notice it? Hard to tell with just the screenshots shown. here is video: V-LOG: -5 everything Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 29 minutes ago, mnewxcv said: the red dot is the zoom tool, OKAY. That is what I wanted to know. The artifacts look like noise to me. Could it be that v log is disabling noise reduction and thats why you notice it? Hard to tell with just the screenshots shown. video here: @mnewxcv V-LOG everything -5 could be because there is not enough of light, as you can see in my others shots with v-log, there is no such issue. https://drive.google.com/drive/folders/1K9omRCU9-iqAZ5V28bVj-5NNx0dYvFfT?usp=sharing Quote Link to comment Share on other sites More sharing options...
Video Hummus Posted February 18, 2019 Share Posted February 18, 2019 What lens are you using and what's the f stop at and what was the ISO in that video/screenshots? Just looks like a grey, poorly lit scene with noise. Quote Link to comment Share on other sites More sharing options...
@yan_berthemy_photography Posted February 18, 2019 Author Share Posted February 18, 2019 40 minutes ago, Video Hummus said: What lens are you using and what's the f stop at and what was the ISO in that video/screenshots? Just looks like a grey, poorly lit scene with noise. @Video Hummus 25mm 1.7 from Panasonic, a lot of lens aberration. very cheap lens I tried with my CINE lens, looks so much better, I don't have aberration shot 1.7, ISO400 Quote Link to comment Share on other sites More sharing options...
Simon Young Posted February 18, 2019 Share Posted February 18, 2019 V-log-L on GH5 and Gh5s is known to exhibit severe noise in shadows even at base iso. Even when properly exposed and with the highest bitrate. It’s one of the main reasons I’m holding my breath for the S1. Quote Link to comment Share on other sites More sharing options...
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