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      • X264 is screwing up the color range, causing colors to look washed-out. It's possible you changed it under "Advanced" and that setting doesn't apply to NVENC so it isn't affected. Your settings should be Color Format: NV12, YUV Color Space: 601 (709 is marginally better but has issues with a lot of video players), and YUV Color Range: Partial.
      • Another interesting method of doing YUV to RGB conversion for the purpose of displaying video is to use programmable pixel shaders. You can almost pull it off on a Geforce3 but the GeforceFX and Radeon 9700/9800 cards are advanced enough that you can pass 32 bit YCrCb textures to the video card and do all conversion calculations on the video card.
      • I saw no support for RGB. Only yuy2, nv12, m420 and i420. I've seen other places that RGB is not supported. Though I used to (15 years ago) work with a lot of USB webcams under windows (though not at the USB transport level) and many could deliver RGB. But that may simply be because the drivers converted the raw YUV data for you.
      • Dec 13, 2011 · The emulator's output is RGB, and most codecs will be recording in YUV 4:2:0 ("YUY2" is 4:2:2), so you should stick with RGB, as that will mean only one color conversion instead of two so no extra loss. The codec will handle its own conversion to whatever codec it is recording in; you just want to muck things up as little as possible before that.
      • Basically, I recoreded a clip using the RGB settings in both Lagarith and in DScaler (and again, I use DScaler as it seems to be the only capture program to work with my card correctly). So, as I'm recording with an RGB source, and then encoding using RGB, I assume that this will produce the highest-quality results based on the input I'm providing.
      • nv12與yv12類似,效果一樣,yv12中u和v是連續排列的,而在nv12中,u和v就交錯排列的。 排列举例: 2*2图像yyyyvu; 4*4图像yyyyyyyyyyyyyyyyvvvvuuuu 轉換 . yuv與rgb的轉換公式: u和v元件可以被表示成原始的r,g,和b(r,g,b为γ预校正后的):
      • I'm in the middle of googling this as well. By far, i've learnt some interesting info: RGB is a color space, but YCbCr(444?) is rather a way of encoding RGB. RGB was primarily designed for PC displays, but modern TVs, which are increasing popularity as a PC displays, are "learning" to work with RGB as well.
      • Color Spaces in Frame Grabbers: RGB vs. YUV; A frame grabber: works with streaming video sources to capture individual frames. A quality frame grabber supports at least NTSC and PAL systems. However, the native stream or input to the frame grabber does not need to be analog. ... NV12 format( 640 * 480 Y values, 640 * 480 / 4 Cr and Cb values ...
      • Basically Media SDK decoder output will be in NV12 format and the render needs the RGB24 bit format, so if any conversion code avaiable for converting NV12-->RGB24 would be great help for us.
      • Now, it seems that avisynth only accepts YV12 input, does this mean, that if LAV filters outputs NV12 to ffdshow, that ffdshow automaticly changes it to YV12 for avisynth, and then back again to NV12 for madVR? Since NV12 input is reported from madVR. Does this mean that I should force YV12 output from LAV to get max performance?
      • nv12 Related to I420, NV12 has one luma "luminance" plane Y and one plane with U and V values interleaved. In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2.
      • JPG to YUV, BMP to YUV, EPS to YUV, GIF to YUV, ICO to YUV, PNG to YUV, PDF to YUV, PSD to YUV, TIFF to YUV, PS to YUV, PICT to YUV, AVS to YUV, YUV to YUV, FITS to YUV, SGI to YUV, CIN to YUV, MIFF to YUV, OTB to YUV, PALM to YUV, PCD to YUV, PCDS to YUV, PNM to YUV, PBM to YUV, PGM to YUV, PPM to YUV, DPX to YUV, TGA to YUV, RLE to YUV, XBM to YUV, XPM to YUV, P7 to YUV, DCX to YUV, PCX to ...
      • I saw no support for RGB. Only yuy2, nv12, m420 and i420. I've seen other places that RGB is not supported. Though I used to (15 years ago) work with a lot of USB webcams under windows (though not at the USB transport level) and many could deliver RGB. But that may simply be because the drivers converted the raw YUV data for you.
    • Chroma depend on luma in math calculations, so if you loss some color info - you slightly alternate luminance in some part of the result image. This is noticable on transformations: original_RGB -> compressed_YUV -> restored_RGB, when color sub-sampling take place in the middle of the process.
      • the best way convert nv12 to RGBA. Reply. Follow. Frame genereted by cuVid, color format is nv12, I neet to convert it to RGBA for later process. In NPP library, i found nppiNV21ToRGB_8u_P2C4R, which only process nv21. How can I do the convert for best performance? convert nv12 to nv21 first?
      • Now, it seems that avisynth only accepts YV12 input, does this mean, that if LAV filters outputs NV12 to ffdshow, that ffdshow automaticly changes it to YV12 for avisynth, and then back again to NV12 for madVR? Since NV12 input is reported from madVR. Does this mean that I should force YV12 output from LAV to get max performance?
      • Which color format should i use RGB, NV12, I420 or I444 ? 2 comments. share. ... You can play with color range or color space rec, but do NOT change it from nv12.
      • Y′UV signals are typically created from RGB (red, green and blue) source. Weighted values of R, G, and B are summed to produce Y′, a measure of overall brightness or luminance. U and V are computed as scaled differences between Y′ and the B and R values.
      • RGB should only be used if your streams have a lot of 2D / screen capture. x264 software encoder works natively with YV12, which is a slightly different version of NV12 , basically there can be conversion done between these two formats without any loss of quality.
      • Contribute to microsoft/Windows-universal-samples development by creating an account on GitHub. ... // In the case of NV12, DirectX understands how the texture is laid out, ... // Then inside the shader we convert YUV into RGB so we can render.
    • Another interesting method of doing YUV to RGB conversion for the purpose of displaying video is to use programmable pixel shaders. You can almost pull it off on a Geforce3 but the GeforceFX and Radeon 9700/9800 cards are advanced enough that you can pass 32 bit YCrCb textures to the video card and do all conversion calculations on the video card.
      • X264 is screwing up the color range, causing colors to look washed-out. It's possible you changed it under "Advanced" and that setting doesn't apply to NVENC so it isn't affected. Your settings should be Color Format: NV12, YUV Color Space: 601 (709 is marginally better but has issues with a lot of video players), and YUV Color Range: Partial.
      • May 17, 2017 · RGB should only be used if your streams have a lot of 2D / screen capture. x264 software encoder works natively with YV12, which is a slightly different version of NV12 , basically there can be conversion done between these two formats without any loss of quality.
      • JPG to YUV, BMP to YUV, EPS to YUV, GIF to YUV, ICO to YUV, PNG to YUV, PDF to YUV, PSD to YUV, TIFF to YUV, PS to YUV, PICT to YUV, AVS to YUV, YUV to YUV, FITS to YUV, SGI to YUV, CIN to YUV, MIFF to YUV, OTB to YUV, PALM to YUV, PCD to YUV, PCDS to YUV, PNM to YUV, PBM to YUV, PGM to YUV, PPM to YUV, DPX to YUV, TGA to YUV, RLE to YUV, XBM to YUV, XPM to YUV, P7 to YUV, DCX to YUV, PCX to ...
      • Mat yuv(720,1280, CV_8UC3);//I am reading NV12 format from a camera Mat rgb; cvtColor(yuv,rgb,CV_YUV2RGB_NV12); The resolution of rgb after conversion is 480X720 cvtColor(yuv,rgb,CV_YCrCb2RGB); The resolution of rgb after conversion is 720X1280 However, using the above conversion I am not able to display a proper view of the images
      • Basically, I recoreded a clip using the RGB settings in both Lagarith and in DScaler (and again, I use DScaler as it seems to be the only capture program to work with my card correctly). So, as I'm recording with an RGB source, and then encoding using RGB, I assume that this will produce the highest-quality results based on the input I'm providing.
      • Basically, I recoreded a clip using the RGB settings in both Lagarith and in DScaler (and again, I use DScaler as it seems to be the only capture program to work with my card correctly). So, as I'm recording with an RGB source, and then encoding using RGB, I assume that this will produce the highest-quality results based on the input I'm providing.
    • Jul 31, 2013 · This is an update to my previous entry covers: – YUV420p & YUV422 (UYVY) YUV420p to RGB & view UYVY/YUV422 to RGB and view:
      • // In the case of NV12, DirectX understands how the texture is laid out, so we can create these // shader resource views which represent the two channels of the NV12 texture. // Then inside the shader we convert YUV into RGB so we can render.
      • Therefore, the RGB subtypes in DirectShow do not match the RGB subtypes in Media Foundation. The D3DFORMAT enumeration is defined in the header file d3d9types.h. The following table shows the most common uncompressed RGB formats and the corresponding D3DFORMAT value.
      • To convert 4:2:0 or 4:2:2 YUV to RGB, we recommend converting the YUV data to 4:4:4 YUV, and then converting from 4:4:4 YUV to RGB. The AYUV format, which is a 4:4:4 format, uses 8 bits each for the Y, U, and V samples.
      • // In the case of NV12, DirectX understands how the texture is laid out, so we can create these // shader resource views which represent the two channels of the NV12 texture. // Then inside the shader we convert YUV into RGB so we can render.
      • NV12 yuv pixel format. YUV 4:2:0 image with a plane of 8 bit Y samples followed by an interleaved U/V plane containing 8 bit 2x2 subsampled colour difference samples.
      • X264 is screwing up the color range, causing colors to look washed-out. It's possible you changed it under "Advanced" and that setting doesn't apply to NVENC so it isn't affected. Your settings should be Color Format: NV12, YUV Color Space: 601 (709 is marginally better but has issues with a lot of video players), and YUV Color Range: Partial.
      • YUV is actually the name of the color space that is common to all "YUV" pixel formats. Contrary to RGB formats (Red-Green-Blue), YUV colors are represented with one "luminance" component called Y (equivalent to grey scale) and two "chrominance" components, called U (blue projection) and V (red projection) respectively, hence the name.
      • Convert RGB to NV12 color space, in Matlab, IPP, Plain C, and SSE optimized code - cohenrotem/Rgb2NV12
      • NV12 yuv pixel format. YUV 4:2:0 image with a plane of 8 bit Y samples followed by an interleaved U/V plane containing 8 bit 2x2 subsampled colour difference samples.
    • NV12 yuv pixel format Written by Paul Bourke August 2016 The NV12 image format is commonly found as the native format from various machine vision, and other, video cameras. It is yet another variant where colour information is stored at a lower resolution than the intensity data.
      • X264 is screwing up the color range, causing colors to look washed-out. It's possible you changed it under "Advanced" and that setting doesn't apply to NVENC so it isn't affected. Your settings should be Color Format: NV12, YUV Color Space: 601 (709 is marginally better but has issues with a lot of video players), and YUV Color Range: Partial.
      • Therefore, the RGB subtypes in DirectShow do not match the RGB subtypes in Media Foundation. The D3DFORMAT enumeration is defined in the header file d3d9types.h. The following table shows the most common uncompressed RGB formats and the corresponding D3DFORMAT value.
      • Difference between MJPG and YUV formats?. Learn more about image processing, image analysis, image segmentation, image acquisition, color space Image Acquisition Toolbox, Image Processing Toolbox
      • NV12 yuv pixel format Written by Paul Bourke August 2016 The NV12 image format is commonly found as the native format from various machine vision, and other, video cameras. It is yet another variant where colour information is stored at a lower resolution than the intensity data.
    • A way to convert YUV (NV12) files to RGB (BMP). Requires PIL (Python Image Library) - yuv2rgb.py
      • Dec 13, 2011 · The emulator's output is RGB, and most codecs will be recording in YUV 4:2:0 ("YUY2" is 4:2:2), so you should stick with RGB, as that will mean only one color conversion instead of two so no extra loss. The codec will handle its own conversion to whatever codec it is recording in; you just want to muck things up as little as possible before that.
      • nv12 Related to I420, NV12 has one luma "luminance" plane Y and one plane with U and V values interleaved. In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2.
      • videoconvert. Convert video frames between a great variety of video formats. Example launch line gst-launch-1.0 -v videotestsrc ! video/x-raw,format=YUY2 ! videoconvert ! autovideosink
      • nv12 Related to I420, NV12 has one luma "luminance" plane Y and one plane with U and V values interleaved. In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2.
      • A way to convert YUV (NV12) files to RGB (BMP). Requires PIL (Python Image Library) - yuv2rgb.py

Nv12 vs rgb

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What are the trade-offs for using VPP vs. IPP for RGB to NV12 color conversion? I am currently using IPP but am unsure what the implication would be for switching to VPP. Is VPP a GPU implementation of color conversion on the GPU's EUs?

I'm in the middle of googling this as well. By far, i've learnt some interesting info: RGB is a color space, but YCbCr(444?) is rather a way of encoding RGB. RGB was primarily designed for PC displays, but modern TVs, which are increasing popularity as a PC displays, are "learning" to work with RGB as well.Therefore, the RGB subtypes in DirectShow do not match the RGB subtypes in Media Foundation. The D3DFORMAT enumeration is defined in the header file d3d9types.h. The following table shows the most common uncompressed RGB formats and the corresponding D3DFORMAT value. 与我们熟知的rgb类似,yuv也是一种颜色编码方法,主要用于电视系统以及模拟视频领域,它将亮度信息(y)与色彩信息(uv)分离,没有uv信息一样可以显示完整的图像,只不过是黑白的,这样的设计很好地解决了彩色电视机与黑白电视的兼容问题。 Okay, so you’ve read the articles on Luminance vs Chrominance, the meaning of Y’CbCr, and the meaning of the numbers in chroma sub-sampling.But you’re still confused about the difference between RGB 444 and Y’CbCr 444. Another interesting method of doing YUV to RGB conversion for the purpose of displaying video is to use programmable pixel shaders. You can almost pull it off on a Geforce3 but the GeforceFX and Radeon 9700/9800 cards are advanced enough that you can pass 32 bit YCrCb textures to the video card and do all conversion calculations on the video card.

Jul 31, 2013 · This is an update to my previous entry covers: – YUV420p & YUV422 (UYVY) YUV420p to RGB & view UYVY/YUV422 to RGB and view: Jul 01, 2018 · pls ignore

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nv12 Related to I420, NV12 has one luma "luminance" plane Y and one plane with U and V values interleaved. In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2. 相比rgb表示来说,我们这次用了四个参数。 可以建立起一个三元一次等式,第三个可以通过其他两个计算出来。 在YCbCr空间中,只有Y和Cb、Cr值被传输和存储,而且Cb和Cr的分辨率可以比Y低,因为人类视觉系统对于亮度更加敏感。 JPG to YUV, BMP to YUV, EPS to YUV, GIF to YUV, ICO to YUV, PNG to YUV, PDF to YUV, PSD to YUV, TIFF to YUV, PS to YUV, PICT to YUV, AVS to YUV, YUV to YUV, FITS to YUV, SGI to YUV, CIN to YUV, MIFF to YUV, OTB to YUV, PALM to YUV, PCD to YUV, PCDS to YUV, PNM to YUV, PBM to YUV, PGM to YUV, PPM to YUV, DPX to YUV, TGA to YUV, RLE to YUV, XBM to YUV, XPM to YUV, P7 to YUV, DCX to YUV, PCX to ... The conversion from RGB to YUV looks something like this: Y = 0.299 x R + 0.587 x G + 0.114 x B U = -0.147 x R – 0.289 x G + 0.436 x B V = 0.615 x R – 0.515 x G – 0.100 x B. The reason why I wrote “something” is because there are a lot of different versions for converting RGB to YUV. The above are the correct values for NTSC. Difference between MJPG and YUV formats?. Learn more about image processing, image analysis, image segmentation, image acquisition, color space Image Acquisition Toolbox, Image Processing Toolbox

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相比rgb表示来说,我们这次用了四个参数。 可以建立起一个三元一次等式,第三个可以通过其他两个计算出来。 在YCbCr空间中,只有Y和Cb、Cr值被传输和存储,而且Cb和Cr的分辨率可以比Y低,因为人类视觉系统对于亮度更加敏感。 .

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I saw no support for RGB. Only yuy2, nv12, m420 and i420. I've seen other places that RGB is not supported. Though I used to (15 years ago) work with a lot of USB webcams under windows (though not at the USB transport level) and many could deliver RGB. But that may simply be because the drivers converted the raw YUV data for you. Cmyk file
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