When converting to MP4, the color of the video changes.

[Limpa]

When converting to MP4, the color of the video changes. 

Even if the color doesn't change, when I upload the video on the web, it looks like I'm raising the exposure value and applying a yellow filter.

How can I solve this problem? If you know the answer, please help. 

[n. tilcheff]

Try different profiles and higher bit rates, but H.264 (packed as MP4) uses compression similar to JPG, so it is not optimised for high-contrast solid colour shapes. It usually fails much more in the reds than in blue-green area.