Questions tagged [colorspace]

An RGB color space is any additive color space based on the RGB color model. A particular RGB color space is defined by the three chromaticities of the red, green, and blue additive primaries, and can produce any chromaticity that is the triangle defined by those primary colors. The complete specification of an RGB color space also requires a white point chromaticity and a gamma correction curve.

13 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
1 vote
1 answer
39 views

Using ffmpeg gdigrab to capture desktop output to h264 yuv420p. Color shift problem

The ffmpeg command below is being used to capture the desktop and create a resulting mp4. ffmpeg log says the input stream is bmp and I specified the target as h264 yuv420p. I found several older ...
user avatar
  • 11
1 vote
0 answers
150 views

Do you always need to convert videos with a YUV color space for compositing in Blender?

I have a 10 bits .mov file with YUV color space encoded prores 422HQ of some green screen footage. -Do we always need to convert videos with a YUV color space for compositing work? If I want to ...
user avatar
1 vote
0 answers
900 views

Why has grayscale a higher bitrate than YUV with H.265/HEVC?

For compression purposes, I am re‐encoding a grayscale video to the H.265/HEVC codec. Although the input video is more or less perfectly grayscale in aspect, it is provided in the yuv420p pixel format....
user avatar
  • 111
1 vote
0 answers
391 views

ffmpeg ProRes to MP4 Alters Colors Slightly

I cannot for the life of me figure out what is going wrong, but I have a ProRes MOV file with the following specifications: And I want to convert it to a 4:2:0 MP4 video file. Every time I attempt ...
user avatar
1 vote
0 answers
2k views

ffmpeg: color loss when encoding to .webm

When encoding to webm (specifically VP8, i.e. libvpx), the color range gets reduced from 0-255 to 15-235. This causes a washed-out look; blacks become faded and not as sharp. I have found solutions ...
user avatar
  • 117
1 vote
0 answers
684 views

MPC-HC is altering the colors

In order to test a lossless recording system, I have to verify that the input video is exactly the same than the output video. As a test source I have generated an ffmpeg's testsrc pattern, which is ...
user avatar
  • 163
0 votes
0 answers
20 views

Does changing pixel format negatively affects quality of the result (yuv422p10 to yuv420p) – using ffmpeg

I have a ProRes video in yuv422p10 pixel format. When I transcode it for distribution into h264, I can either use baseline profile where I am stuck with yuv420p or use another profile and keep ...
user avatar
  • 113
0 votes
0 answers
24 views

Why does my ipad/macbook video camera quality not match logitech hd c270 quality?

I am trying to write a program that takes a video of someone's face, extracts the RGB values, and then uses the color change (imperceptible to the human eye) to map onto heart rate. When I use a ...
user avatar
  • 101
0 votes
0 answers
42 views

Correctly compositing linear RGB elements over log footage

I have some water splash elements I need to composite over log footage in After Effects before sending it to the colorist for grading. As I understand, the correct workflow is to convert the log ...
user avatar
0 votes
1 answer
2k views

Color changes after video to single frame images back to video using ffmpeg

Given master video in mov rle: Video: qtrle (rle / 0x20656C72), rgb24(progressive) Converted the video to a serie of single .bmp frames. ffmpeg -i source.mov $FRAMES/f%03d.bmp Frames from ...
user avatar
  • 179
0 votes
1 answer
1k views

Color shift FFmpeg raw RGBA images to YUV format

I have a list of raw bitmap in rgba format, captured with an openGL frameBuffer. I want to export them in a video, currently i am using the following command: ffmpeg -f rawvideo -r 30 -pix_fmt rgba -...
user avatar
  • 123
0 votes
1 answer
699 views

Generating video thumbnails preview / contact sheet in batch, color issue

I have a large collection of videos to sort out, and for that purpose I want to create a thumbnail preview for each one of them, as quickly and efficiently as possible. I have tested several tools ...
user avatar
  • 101
0 votes
1 answer
105 views

Matching colors for video

It appears that loading a graphics asset into Premiere’s new (2017.1) layered drawing tools does not do any kind of profile matching. Furthermore, the play preview image looks different on my (color ...
user avatar
  • 245