John Brawley Cinematographer Sydney Australia www. Can you say why I must set my video card or player to use output with my RGB monitor if I want to see all the levels of my videos GH4? I compared the original GH4 video source frame and the same frame captured from monitor after output level adjustment in Potplayer and video card full range mode. I studied the frames in Photoshop and those are absolutely identical, no IQ loss or level conversion.
It is quite disturbing and against common sense to set video output to limited range before sending it to video card. The Potplayer has a floating level space and when using a limited output range it actually sends the right levels to video card and monitor. Nothing is lost. So I use in Potplayer level settings input source and output and video card full scale Then I see all the original GH4 levels right in my monitor. I can have the same effect by selecting a limited range in video card and leaving levels untouched in player.
The practical thing with Potplayer is that I can alter levels if I want to enhance levels while playing files or if watching different cameras which has different levels.
GH2 for example records I'm not familiar with your post process, but many apps will "legalise" the output once you render to your destination codec. So your video card and edit suite are working with full range, but once you choose to output it then either compresses squishing your grade slightly or truncates just cuts the values. Is it worth the hefty price tag? We take a look at the Cine, the high-end model in this series.
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Submit a News Tip! Reading mode: Light Dark. Login Register. Best cameras and lenses. All forums Digital Video Talk Change forum. This seems the case here. The MP4 file is shown both in the mediainfo file and and in the Colour Range as being Limited , that is My camera shoots in either or depending on the Picture Profile chosen. However, the files are just rendered illegally for the and record luma in the range of regardless. That is, a luma file is placed in the correct range by default.
It will look wrong in the preview: subtle to some but not to others. Just make sure everything is set to the same dynamic range, as any mismatch will promptly ruin your image quality. Sure, it would be great if the industry could standardize even more and simply settle on one scale. Or if all displays could auto switch between limited and full RGB based on content. However, neither has transpired just yet so for now you should be aware of this.
Check your graphics card driver settings and display menus to pick the right scale, if such options are provided. You should most definitely choose a monitor with USB-C if you can for an all-in-one-cable solution. Improved response time, reduced input lag, and matured design allow IPS panels to bring the best colors and viewing angles to a gaming monitor near you. Once upon a time reality forced PC users, especially gamers, into buying often-costly external audio devices.
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If one of these players receives a encoded video it may just treat it like it would a , so all values below 16 and above will be clipped. This obviously looks bad. Even if a video is treated as full range the video will just look milky. It wouldn't look right, but at least it wont be clipped. I would rather have a milky video than a clipped video. This is why people recommend setting your output levels to in your editor.
Most of the time it will look correct. And at worst it will look milky. As for what settings to set in camera, it depends on whether you are going to grade the footage. If you are just going to directly upload a clip or just edit with no alterations to brightness, contrast or color, then you may as well record at However if you intend to grade the footage anyway It makes sense to get as much data into the file as possible which means shooting I don't quite get it.
So shooting with the restriction reduces the dynamic range at both ends to make it broadcast-safe? No, the values are re-mapped. So black is 16 and white is So you have the same dynamic range but it is represented by discrete steps instead of So even if I shoot a perfectly black object or with the lens cap I would get raised blacks to 16?
No perfect black or white even If I shoot directly at the sun? Yes, if you use normal legal standard video the levels in the video file are If you watch that file with a standard TV or AV monitor it shows these values right as black and white.
If you use a computer monitor the video card expands these levels to monitor RGB You have actually shades but the computer player, editor,video card converts it to shades and the quality is not the same as i. GH4 can record video as illegal or non-standard levels all YUV channels and it in theory records more information than a normal video. It is like "poor mans RAW". When color correcting and rendering the final standard video there is more information to adjust.
My issue is how can I see all the original levels with a computer monitor without any converting. This outputs to broadcast TV levels when rendered.
My camera tends to record with the black levels close to 16 but the white levels up to It helps a great deal with highlight clipping. Adjusting Zebras on the camera to somewhere in the IRE level would help minimizing clipping but my camera lacks the function. You can adjust how the video player shows the video in the graphics cards settings.
For nvidia cards its pretty easy, dont let the video player pick the mode. I've set my GH4 to Lost too despite the generous contributions here.
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