<p>I cannot for the life of me figure out what is going wrong, but I have a ProRes MOV file with the following specifications:</p>

<p><a href="https://i.sstatic.net/dDi5Z.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/dDi5Z.png" alt="enter image description here"></a></p>

<p>And I want to convert it to a 4:2:0 MP4 video file.  Every time I attempt the following command:</p>

<p><code>ffmpeg -i "Abstract Blue and Orange Motion.mov" -pix_fmt yuv420p "111.mp4"</code></p>

<p>I end up with an video that is slightly different in color than the original (the color conversion wasn't performed properly by ffmpeg).  When I import the original MOV and the output MP4 into After Effects CC 2019, we can see the difference in the color quite easily.  Screenshots of several examples can be juxtaposed here (original on the right, output mp4 on the left):</p>

<p><a href="https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=991a6f3e-e9dd-11e9-b9b8-0edaf8f81e27" rel="nofollow noreferrer">https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=991a6f3e-e9dd-11e9-b9b8-0edaf8f81e27</a></p>

<p><a href="https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=60019d2a-e9de-11e9-b9b8-0edaf8f81e27" rel="nofollow noreferrer">https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=60019d2a-e9de-11e9-b9b8-0edaf8f81e27</a></p>

<p>I do not understand what I am doing wrong.  <strong>How do I convert this input MOV to an MP4 file without affecting the colors in ffmpeg?</strong>  For reference, I am using <code>ffmpeg version N-94150-g231d0c819f Copyright (c) 2000-2019 the FFmpeg developers</code>.</p>

<p>More version details can be found here: <a href="https://pastebin.com/raw/Mcm4HJAg" rel="nofollow noreferrer">https://pastebin.com/raw/Mcm4HJAg</a>.  Also, it should be noted that if I convert the mov file to mp4 in Adobe Media Encoder, the colors do not look washed out the way they do with ffmpeg.  So clearly I'm not using ffmpeg correctly, or this is a bug.</p>

CC BY-SA 4.0
2019-10-08T15:49:08.887Z
Can't see the images.
Gyan
CC BY-SA 4.0
2019-10-08T15:52:26.467Z
@Gyan, here is a screenshot comparing the two: https://i.imgur.com/AP5gMXd.jpg and another: https://i.imgur.com/gsgpaTZ.jpg.  Apparently the links in my question work in chrome but not firefox.  I'm not sure why.
EllipticalInitial
<ffmpeg><h.264><transcoding><prores><colorspace>
ffmpeg ProRes to MP4 Alters Colors Slightly
EllipticalInitial
# ffmpeg ProRes to MP4 Alters Colors Slightly

(Asked by: username_0 on 2019-10-08)

I cannot for the life of me figure out what is going wrong, but I have a ProRes MOV file with the following specifications:

[![enter image description here](https://i.sstatic.net/dDi5Z.png)](https://i.sstatic.net/dDi5Z.png)

And I want to convert it to a 4:2:0 MP4 video file. Every time I attempt the following command:

`ffmpeg -i "Abstract Blue and Orange Motion.mov" -pix_fmt yuv420p "111.mp4"`

I end up with an video that is slightly different in color than the original (the color conversion wasn't performed properly by ffmpeg). When I import the original MOV and the output MP4 into After Effects CC 2019, we can see the difference in the color quite easily. Screenshots of several examples can be juxtaposed here (original on the right, output mp4 on the left):

<https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=991a6f3e-e9dd-11e9-b9b8-0edaf8f81e27>

<https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=60019d2a-e9de-11e9-b9b8-0edaf8f81e27>

I do not understand what I am doing wrong. **How do I convert this input MOV to an MP4 file without affecting the colors in ffmpeg?** For reference, I am using `ffmpeg version N-94150-g231d0c819f Copyright (c) 2000-2019 the FFmpeg developers`.

More version details can be found here: <https://pastebin.com/raw/Mcm4HJAg>. Also, it should be noted that if I convert the mov file to mp4 in Adobe Media Encoder, the colors do not look washed out the way they do with ffmpeg. So clearly I'm not using ffmpeg correctly, or this is a bug.

**Tags:** ffmpeg, h.264, transcoding, prores, colorspace

> **Comments:**
> **username_1**: Can't see the images.  
> **username_0**: @username_1, here is a screenshot comparing the two: https://i.imgur.com/AP5gMXd.jpg and another: https://i.imgur.com/gsgpaTZ.jpg.  Apparently the links in my question work in chrome but not firefox.  I'm not sure why.  

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## 0 answers

