Colorspace support in FFmpeg
What is colorspace? Why should we care?
Colorspace describes how an array of pixel values should be displayed on the screen. It provides information like how pixel values are stored within a file, and what the range and meaning of those values are.
Basically, it tells the format of the array of pixels (e.g. RGB or YUV), and how the values of each color component should be translated, to be properly displayed by the photons of the screen. (i.e. picking a colorspace randomly seems unlikely to be a good choice...)
The differences between RGB and YUV:
- RGB distinguishes color pixel values into 3 components: Red, Green, Blue. (hence the name)
- YUV uses a different representation schema that represents color pixel values in: Luma (Y, or brightness), Chroma (U and V, two color differences). This format exploits the fact that humans are able to better notice details in luminance (approximated by luma) than in chroma. [ Note: YUV represents color in 3 components. ]
Note:
͏ The term "YUV" is ambiguous and often used wrongly [1], including the definition of pixel formats in FFmpeg.
͏ A more accurate term for how colors stored in digital video would be YCbCr.
͏ Y'UV on the other hand specifies a colorspace consisting of luma (Y') and chrominance (UV) components.
͏ For more info read Wikipedia <YUV>.
[ [1]
͏ There's no practical difference between YUV and YCbCr: sort of more like "RGB" and "BGR".
͏ "UV" doesn't explicitly state the exact type of color difference neither. (so it might be "CbCr") ]
͏ In following, the term YUV is used as in FFmpeg pixel formats: referring to YCbCr in digital video.
The conversion between YUV pixel buffer representation and its visual representation depends on the type of the YUV represented in the pixel buffers, which are essentially device-dependent. The accuracy of grey vs color separation depends on how well the transformation matrix matches the underlying RGB space.
Examples are:
- BT.601 ("Standard-Definition" or SD)
- BT.709 ("High-Definition" or HD)
- BT.2020 ("Ultra-High-Definition" or UHD)
These standards describe not just things like how to convert a YUV signal to RGB, but also how a RGB signal should be represented in terms of photon emission, in a device-independent way.
How does FFmpeg identify colorspaces?
In FFmpeg, colorspaces are represented in the form of pixel format.
In practical terms, the properties you care about are:
- The signal format in the pixel buffer:
- the signal type: RGB, YUV, or other type, and
- the signal bit-depth.
- For YUV signals, the color range: full/pc/jpeg or limited/restricted/tv/mpeg. [ See also: # ͏"color_primaries" ]
For 8bpc (bit-per-component): full means 0 .. 255, limited 16 .. 235. - The transformation matrix between YUV and RGB.
- The linearization function from RGB to a linear RGB signal.
- The conversion matrix between the linearized RGB and the device-independent XYZ colorspace.
FFmpeg stores these properties in the AVFrame struct:
- The format (type and bit-depth)->format
- The signal range->color_range
- The YUV/RGB transformation matrix->colorspace
- The linearization function (a.k.a. transformation characteristics)->color_trc
- The RGB/XYZ matrix->color_primaries
How to use FFmpeg to convert the colorspace
Warning: https://trac.ffmpeg.org/wiki/Scaling#Warning
Pixel format conversion is often performed by libswscale, which you will most likely access through the FFmpeg Scaler or the scale video filter.
Other video filters include:
colormatrix
(native)colorspace
(native)zscale
(z.lib library)
Comparing and contrasting colorspace
, colormatrix
, libswscale, and zscale
colorspace
andcolormatrix
can only convert YUV to YUV- libswscale can convert between YUV and RGB
colormatrix
only supports 8bpc pixel formatscolorspace
supports 8bpc, 10bpc, and 12bpccolormatrix
does not apply gamma and primaries correction (i.e. which exact color "red", "green", and "blue" each is)colorspace
applies gamma and primaries correction by default. (Usefast=1
to disable this for faster conversion or to make output compatible with output produced bycolormatrix
.)colormatrix
is C only, whereascolorspace
uses x86 SIMD so it's fastercolormatrix
produces horrible quality for 10bpc and 12bpccolorspace
produces something decent for 10bpc- For 8bpc,
colorspace
seems to produce slightly better quality thancolormatrix
zscale
produces better results at all bit depths
colorspace
and friends
The easiest way to use these filters is to ensure that the input AVFrames have all relevant struct members set to the appropriate values. On ffmpeg command-line this is what options such as colorspace
and color_trc
do; you can also put them on the output side to modify what space the output is in.
If everything goes well, libswscale figures out how to do the conversion and you can avoid calling the filter manually. However, AVFrames does not cover every option needed, so advanced use will go back to colorspace
or zscale
.
See also sws_setColorspaceDetails() and F.X.'s colorspace answer.
sRGB
There is no colorspace default called sRGB in FFmpeg, because it's identical to BT.709 except for a different transfer function. Just use one of the following:
- sRGB input, fast:
-vf "colorspace=all=bt709:fast=1"
, aka-colorspace bt709
(on the input side!) - sRGB input, accurate:
-vf "colorspace=all=bt709:itrc=srgb:fast=0"
, aka-colorspace bt709 -color_trc srgb
(on the input side!)
See also F.X.'s HDR answer and Gyan's sRGB output answer. If srgb
does not work, try the more academic name iec61966-2-1
.
"color_primaries"
͏ Quick reference for somewhat cryptic "color_primaries" names:
͏ 1: "bt709" (BT.709)
͏ 5: "bt470bg" / "gamma28" (BT.470 BG)
͏ 6: "smpte170m" (SMPTE 170 M)
͏ (alike for "colorspace" "color_trc")
͏ .
͏ See also:
(`ffmpeg -h full` derived)
[[
-color_range <int> color range (from 0 to INT_MAX) (default unknown) 0 unknown Unspecified unspecified 1 tv MPEG (( 219 * 2^( n - 8 ) )) mpeg limited 2 pc JPEG (( 2^n - 1 )) jpeg full -colorspace <int> color space (from 0 to INT_MAX) (default unknown) 0 rgb RGB 1 bt709 BT.709 2 unknown Unspecified unspecified 4 fcc FCC 5 bt470bg BT.470 BG 6 smpte170m SMPTE 170 M 7 smpte240m SMPTE 240 M 8 ycgco YCGCO ycocg 9 bt2020nc BT.2020 NCL bt2020_ncl 10 bt2020c BT.2020 CL bt2020_cl 11 smpte2085 SMPTE 2085 12 chroma-derived-nc Chroma-derived NCL 13 chroma-derived-c Chroma-derived CL 14 ictcp ICtCp 15 ipt-c2 IPT-C2 16 ycgco-re YCGCO-R (even add) 17 ycgco-ro YCGCO-R (odd add) -color_primaries <int> color primaries (from 1 to INT_MAX) (default unknown) 1 bt709 BT.709 2 unknown Unspecified unspecified 4 bt470m BT.470 M 5 bt470bg BT.470 BG 6 smpte170m SMPTE 170 M 7 smpte240m SMPTE 240 M 8 film Film 9 bt2020 BT.2020 10 smpte428 SMPTE 428-1 smpte428_1 11 smpte431 SMPTE 431-2 12 smpte432 SMPTE 422-1 22 jedec-p22 JEDEC P22 ebu3213 EBU 3213-E -color_trc <int> color transfer characteristics (from 1 to INT_MAX) (default unknown) 1 bt709 BT.709 2 unknown Unspecified unspecified 4 gamma22 BT.470 M 5 gamma28 BT.470 BG 6 smpte170m SMPTE 170 M 7 smpte240m SMPTE 240 M 8 linear Linear 9 log100 Log log 10 log316 Log square root log_sqrt 11 iec61966-2-4 IEC 61966-2-4 iec61966_2_4 12 bt1361e BT.1361 bt1361 13 iec61966-2-1 IEC 61966-2-1 iec61966_2_1 14 bt2020-10 BT.2020 10-bit bt2020_10bit 15 bt2020-12 BT.2020 12-bit bt2020_12bit 16 smpte2084 SMPTE 2084 17 smpte428 SMPTE 428-1 smpte428_1 18 arib-std-b67 ARIB STD-B67
]]
͏ [ Still cryptic whatsoever... ]
Examples (with 20240506 git-master)
͏ Note:
͏ Use [ https://github.com/MasterInQuestion/Markup/blob/main/picdif.htm ] for image comparison.
͏ (may not work well on small screen and/or browser asserted ͏"devicePixelRatio" != 1)
͏ .
͏ Image comparison also by:
͏ ffmpeg -hide_banner -nostdin -i ${in0} -i ${in1} -lavfi "ssim; [0][1]psnr" -f null -
͏ [ https://trac.ffmpeg.org/ticket/10922#comment:description ]
͏ Warning:
͏ Due to TracWiki's limitation, the page is riddled with Unicode special characters (to workaround).
͏ (either invisible or of tricky look; near links, indentation; maybe else)
͏ .
͏ Copy / Edit with caution.
͏ Some changes occurred for the ͏"colorspace" filter meanwhile.
͏ Differ the following 4:
͏ #colorspace_yuv444p10le-yuv444p
͏ #colorspace_fast=0_iall=bt601-6-625
͏ #colorspace_fast=0_iall=bt601-6-525
͏ #colorspace_yuv420p10le-yuv420p
͏ Common pattern:
͏ "-vf" involved either:
͏ |1| "colorspace=bt709:iall=bt601-6-625:fast=1"
͏ |2| "colorspace=bt709:iall=bt601-6-625"
͏ |3| "colorspace=bt709:iall=bt601-6-525"
͏ Rather noticeable visual difference for |2| |3|. [ Near right-upper houses/shrubs in dark. ]
͏ Clarification appreciated. [ Rationale and relevant commits? ]
͏ .
͏ Warning message of interest:
͏ “[Parsed_colorspace_0] Input range not set, assuming tv/mepg”
͏ Specifying "irange=2" white-out things. (assumed 1 when not set)
͏ Note 6.1.1 didn't emit the warning: but generated [near-]identical [1] files as 20240506 git-master.
͏ .
͏ Less noticeable for |1|: mostly noise differences. [ Near aforementioned area; and the sky banding. ]
[ [1]
͏ "fast=1" related ones differ petty noises:
͏ Presumably for the added "csp:bt709 range:tv" assertions.
͏ Caveat the execution may have platform dependent differences. (typically no matter)
͏ "+bitexact" to various flags (͏"-sws_flags", ͏"-flags", ͏"-fflags") to insist platform independent (also non-stochastic) output. (may sacrifice speed)
͏ [ ^ One would also typically like "-map_metadata -1 -map_chapters -1" in such case. ]
͏ "-bitexact" should be shortcut for above:
͏ https://github.com/search?type=code&q=repo:FFmpeg/FFmpeg+path:/^fftools%5C//+/(?-i)BITEXACT/
͏ (seemingly missing "SWS_BITEXACT" yet) [ #11007 ] ]
The input source (rgb24):
https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/origin(rgb24).webp
(~ 879.32 KiB; WebP Lossless: 1440x836)
"colormatrix
" (yuv444p10le):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colormatrix=bt470bg:bt709" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colormatrix_yuv444p10le.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colormatrix_yuv444p10le.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colormatrix_yuv444p10le.webp"
Output bit-identical as "colormatrix" (yuv444p).
"colorspace
" (yuv444p10le):
[ Note:
͏ SSIM > 99.98% with The input source (rgb24).
͏ Should be 100% if the conversion algorithms are improved, though. ]
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-625:fast=1" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv444p10le.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv444p10le.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv444p10le.webp"
Reference (yuv444p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p -sws_flags spline+accurate_rnd+full_chroma_int -color_range 1 -colorspace 5 -color_primaries 5 -color_trc 6 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "yuv444p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "yuv444p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "yuv444p.webp"
"colormatrix
" (yuv444p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p -sws_flags spline+accurate_rnd+full_chroma_int -vf "colormatrix=bt470bg:bt709" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colormatrix_yuv444p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colormatrix_yuv444p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colormatrix_yuv444p.webp"
"colorspace
" (yuv444p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-625:fast=1" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv444p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv444p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv444p.webp"
"colorspace
" (yuv444p10le -> yuv444p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "colorspace_yuv444p10le.avi" -pix_fmt yuv444p -sws_flags spline+accurate_rnd+full_chroma_int -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv444p10le-yuv444p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv444p10le-yuv444p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv444p10le-yuv444p.webp"
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_yuv444p10le-yuv444p.webp
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_yuv444p10le-yuv444p.20190416.webp
"colorspace
" with "fast=0
" "iall=bt601-6-625
":
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-625" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_fast=0_iall=bt601-6-625.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_fast=0_iall=bt601-6-625.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_fast=0_iall=bt601-6-625.webp"
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_fast=0_iall=bt601-6-625.webp
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_fast=0_iall=bt601-6-625.20190416.webp
"colorspace
" with "fast=0
" "iall=bt601-6-525
":
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-525" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_fast=0_iall=bt601-6-525.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_fast=0_iall=bt601-6-525.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_fast=0_iall=bt601-6-525.webp"
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_fast=0_iall=bt601-6-525.webp
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_fast=0_iall=bt601-6-525.20190416.webp
"colorspace
" with "fast=1
" "iall=bt601-6-525
":
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv444p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-525:fast=1" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_fast=1_iall=bt601-6-525.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_fast=1_iall=bt601-6-525.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_fast=1_iall=bt601-6-525.webp"
Output bit-identical as "colorspace" (yuv444p10le).
Reference (yuv420p10le):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv420p10le -sws_flags spline+accurate_rnd+full_chroma_int -color_range 1 -colorspace 5 -color_primaries 5 -color_trc 6 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "yuv420p10le.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "yuv420p10le.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "yuv420p10le.webp"
"colorspace
" (yuv420p10le):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv420p10le -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-625:fast=1" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv420p10le.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv420p10le.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv420p10le.webp"
Reference (yuv420p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv420p -sws_flags spline+accurate_rnd+full_chroma_int -color_range 1 -colorspace 5 -color_primaries 5 -color_trc 6 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "yuv420p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "yuv420p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "yuv420p.webp"
"colorspace
" (yuv420p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "origin(rgb24).png" -pix_fmt yuv420p -sws_flags spline+accurate_rnd+full_chroma_int -vf "colorspace=bt709:iall=bt601-6-625:fast=1" -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv420p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv420p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv420p.webp"
"colorspace
" (yuv420p10le -> yuv420p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "colorspace_yuv420p10le.avi" -pix_fmt yuv420p -sws_flags spline+accurate_rnd+full_chroma_int -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv420p10le-yuv420p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv420p10le-yuv420p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv420p10le-yuv420p.webp"
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_yuv420p10le-yuv420p.webp
͏ https://github.com/MasterInQuestion/attach/raw/main/@ext/trac.ffmpeg.org/wiki/colorspace/colorspace_yuv420p10le-yuv420p.20190416.webp
"colorspace
" (yuv444p10le -> yuv420p):
͏ ffmpeg -y -v trace -hide_banner -nostdin -nostats -i "colorspace_yuv444p10le.avi" -pix_fmt yuv420p -sws_flags spline+accurate_rnd+full_chroma_int -color_range 1 -colorspace 1 -color_primaries 1 -color_trc 1 -c:v libx264 -preset placebo -qp 0 -x264-params "keyint=15:no-deblock=1" "colorspace_yuv444p10le-yuv420p.avi"
͏ ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "colorspace_yuv444p10le-yuv420p.avi" -pix_fmt rgb24 -sws_flags +accurate_rnd+full_chroma_int -lossless 1 -q 100 -compression_level 6 "colorspace_yuv444p10le-yuv420p.webp"
Hint about "full_chroma_inp"
͏ https://github.com/search?type=code&q=repo:FFmpeg/FFmpeg+%22SWS_FULL_CHR_H_INP%22
͏ https://github.com/FFmpeg/FFmpeg/blob/4ec45aca36ff6c7c7767536ce7f4a855f8b37fb0/libswscale/utils.c#L1530-L1546
͏ https://github.com/FFmpeg/FFmpeg/blob/41ed7ab45fc693f7d7fc35664c0233f4c32d69bb/doc/swscale.txt#L50-L57
Attachments (14)
- origin(rgb24).png (1.2 MB ) - added by 5 years ago.
- colorspace_yuv444p10le.png (1.2 MB ) - added by 5 years ago.
- yuv444p.png (1.3 MB ) - added by 5 years ago.
- colormatrix_yuv444p.png (1.3 MB ) - added by 5 years ago.
- colorspace_yuv444p.png (1.3 MB ) - added by 5 years ago.
- colorspace_yuv444p10le-yuv444p.png (1.5 MB ) - added by 5 years ago.
- colorspace_fast=0_iall=bt601-6-625.png (1.3 MB ) - added by 5 years ago.
- colorspace_fast=0_iall=bt601-6-525.png (1.3 MB ) - added by 5 years ago.
- yuv420p10le.png (1.2 MB ) - added by 5 years ago.
- colorspace_yuv420p10le.png (1.2 MB ) - added by 5 years ago.
- yuv420p.png (1.2 MB ) - added by 5 years ago.
- colorspace_yuv420p.png (1.3 MB ) - added by 5 years ago.
- colorspace_yuv420p10le-yuv420p.png (1.4 MB ) - added by 5 years ago.
- colorspace_yuv444p10le-yuv420p.png (1.4 MB ) - added by 5 years ago.