12

PAL and NTSC have different color primaries, so NTSC = SMPTE 170M = BT 601 525 PAL = BT 470 BG = BT 601 625 See the rows for value 5 & 6 on the table on page 387 of the active H.264 standard. So the right args for ffmpeg are: NTSC: # NTSC ffmpeg -i input \ -colorspace smpte170m -color_primaries smpte170m -color_trc smpte170m mediainfo: Color ...


8

If your question was Where are these pixel formats defined? Go to http://ffmpeg.org/download.html and download the source of ffmpeg. Then unpack it tar -xavf FILENAME.tar.* and descend to the folder in the source code that is called libavutil cd ffmpeg-*/libavutil/ and open the file pixfmt.h where you will find a description of all pixel formats. A ...


7

You may want to use FFMPEG's lut3d filter. It requires you to provide a look-up table (a *.cube file). For example, if you have an ARRI camera you can generate these files using ARRI Color Tool or simply download a package with them from the linked page. Once you have the files, use FFMPEG like this: ffmpeg -i "Input.mov" -vf lut3d="ARRIP3D65PQ108-33....


5

Most videos are limited range i.e. luma goes from 16 to 235, and chroma from 16 to 240. Unless expressly set, FFmpeg does not scale the range from one to another. Whatever the source is, that's the output.* However, many inputs don't tag this property in their metadata. So, the output doesn't get tagged either. In that scenario, players tend to assume ...


4

There are a number of reasons why there are so many color spaces: Color resolution - sRGB and similar color spaces only cover a portion of the visible spectrum. This means that they can be represented with fewer bits per color channel. (8 in the case of sRGB.) For something like Rec. 2020 or ACEScg, you need 16 or more bits per channel. If you don't have ...


3

YUV color encoding with 4:2:0 chroma subsampling is the only widely safe pixel format for web playback, although for certain codecs, other pixel formats may be supported. FFmpeg auto-selects the pixel format for the output as not all encoders support all pixel formats. It will select the pixel format which best preserves the source bit depth, chroma ...


3

“Is D-Cinelike just a flatter colour profile with less contrast (to capture more detail in shadows and highlights)?” Yes. It's closer to log color rather than linear. The big thing to be aware of in post production is to make sure you grade it to where you want it to be and possibly use their LUT to convert back towards Rec 709 depending on what you are ...


3

The short answer is: You don't pick a color space for your RAW material based on what kind of monitor you're using. A color pipeline is a very complicated series of mathematical conversions, which is heavily dependent upon: The operating system's color management settings, such as .icc device profiles from manufacturers, and/or calibration software. The ...


3

It's a bit of a semantics game. The YUY2 video mode is not "compressed," but it won't result in a bit-exact copy of RGB input. The luminance is full resolution in that mode, but the chrominance is sampled at a lower resolution. This is technically decimation rather than compression, but some information is indeed lost. That said, if you are ...


3

This command preserved the colorspace and also video didnt get darker after transcoding ffmpeg -i input.mp4 -color_primaries smpte170m -color_trc smpte170m -colorspace smpte170m -r 25 -crf 18 output.mp4 source: https://kdenlive.org/en/project/color-hell-ffmpeg-transcoding-and-preserving-bt-601/ more about colorspace: https://trac.ffmpeg.org/wiki/colorspace


3

Apparently FFmpeg doesn't set input color attributes correctly for BMP input (probably because the file doesn't contain that metadata) and the BMP decoder doesn't check for manually flagged attributes. However, we can force it using the format filter. ffmpeg -i 000.bmp -vf format=rgb24 -pix_fmt yuv420p -vcodec libx264 -profile:v main -crf 16 first.mp4


3

This announcement article dated January 11, 2017 indicates that there will be an upgrade to the app FiLMiC Pro which may accommodate what you are looking for. Note that the FiLMic Pro App Store web page indicates the latest release is 12/23/2016 - I do not know when the update the article speaks of will be available: The forthcoming update will introduce ...


3

Without knowing the video properties, my generic answer is ffmpeg -i in.mp4 -vf geq=lum='p(X,Y)':cb=128:cr=128 out.mp4 This will reset the color information, but pass the luma plane intact. Add -crf 0 for truly lossless re-encoding. This is the faster way, ffmpeg -i in.mp4 -vf extractplanes=y,format=yuv420p out.mp4 The luma plane is extracted, and then ...


3

The order of the components in RGB32 seems to do with endianness: PIX_FMT_RGB32 is handled in an endian-specific manner. An RGBA color is put together as: (A << 24) | (R << 16) | (G << 8) | B This is stored as BGRA on little-endian CPU architectures and ARGB on big-endian CPUs. The descriptions of the various related formats ...


3

While I always guessed that the big / little endian was more a matter of patents rather than performance, Nope little endian was developed as a performance optimization whern moving to multi byte words. https://en.wikipedia.org/wiki/Endianness#Optimization Nothing to to with patents. Different representation have different advantages and disadvantage. ...


3

Mediainfo is a free, open source, cross-platform solution, available in 37 languages. https://en.m.wikipedia.org/wiki/MediaInfo When run from the command line it outputs chrome subsampling info by default: $ mediainfo videofile.mov [...] Chroma subsampling : 4:2:0 [...]


2

In this case, the problem didn't come from ffmpeg/avconv. The rawvideo source I use offers different color formats to be used: argb32 rgb24 bgr24 yuv444 yuv420 [...] When I extract a png file (which was fine), the bgr24 color format is used. When I capture a video, avconv automatically chose one of the yuv formats. I guess the clamping to (16..235) did ...


1

Knowing the details about what format your camera recorded is often as simple as consulting the manual. However, some cameras shoot multiple formats, and often, editors are given footage from unknown or unreliable sources. One of the best tools for discovering the full details of an A/V file is the command line utility, mediainfo. Depending on whether or ...


1

Since I cannot use hyperlinks in comments, here is the gist of my research: This answer on a reddit post suggests, that the reason for the color-shift is the way illegal and legal colors are handled. So maybe the "broadcast colors" effect can help limit the color-range to the legal range? I'd recommend giving that a quick shot. If that doesn't work,...


1

The question is impossible to answer in a general way. If a camera offers to record in RGB, it is likely using a completely different codec that could be better or worse. Very few cameras will actually record video in RGB, so if you see the option in a menu, it may be referring to something very particular about the color handling of video on that specific ...


1

You can use the geq filter to remap the pixel value ranges. ffmpeg -i input -vf "geq=lum='(p(X,Y)-16)/(255-16)*(235-16)+16':cb='(p(X,Y)-16)/(255-16)*(240-16)+16'" -c:v libx264 -c:a copy out.mp4 The geq filter rescales the input luma from 16-255 to 16-235, and both the input chroma from 16-255 to 16-240, which is the legal range for broadcast 8-bit ...


1

Yes, as it says a couple of lines above, colormatrix supports only 8bpc (8-bit per component) pixel formats. So, when a 16-bit input is filtered with colormatrix, it will be converted to 8-bits. And won't get converted back to 16-bit unless manually done or auto-converted due to output encoder limitations. But that's pointless anyway, as the precision has ...


1

Instead of 8 bits per every channel and per every pixel you need 10 bits, which is 25 % increase of the raw footage. Since the size of 8-bit raw footage is as such huge enough, 25 % of it is high enough price, isn't it?


1

Are YUV and YCbCr the same thing? → strictly, no. The former is applied to analog signals, and the latter to digital. But media apps (like Mediainfo) use YUV as the designated term. It doesn't make any sense to say RGB 4:2:0, right? → Not theoretically incoherent, but I haven't seen any codec that implements subsampling for RGB pixels except for Bayer RGB ...


1

If the above render is a RAM preview, the default preview quality may be the culprit: Preferences > PREVIEWS > Color Management Quality > More Accurate.


1

I use the trapcode suite as well, the issue has more to do with the fact that even though you may be working in an sRGB workspace at 32 Bit; your monitor output is 8 bit. 10 Bit monitors are available but unless you forked up a lot of cash - you are viewing 8-bit. The way to solve gradient problems like this - with this as well as any other gradient in AE/...


1

Using the calculator at http://davengrace.com/dave/cspace/, Gamma-weighted #E3000B translates to linear sRGB #C50001


1

I have this issue forever...found a solution thanks to this website https://isaac-molina.com/downloads/ download his luts aplly the correct lut to an adjustment layer placed on top of you project (in my case convert mrec 709 g2.4 to sRGB g2.2) and then you get to see what you get as output, but inside the project viewer, so you can grade correctly. Good luck


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