These equations have been derived and re-derived from an empirical understanding of how we humans perceive light. Colour Spacesīefore going further, it is important to touch base on the concept of colour spaces -Ĭolour spaces are the mathematical profiles/ equations which transform a pixel value of a colour model (such as (255,255,255) of RGB) to a corresponding wavelength of light. It took some research and closely inspecting the video metadata using FFprobe and MediaInfo to figure out that there was a difference in the colour spaces used between the two renders. While the difference is minor, you can notice how the colours in the AE render are richer as compared to the InVideo render which seems more washed out. So we did a visual comparison of our InVideo output with the output of the same composition from After Effects (via Adobe Media Encoder) in their export settings for High Definition videos. Well, we thought so too until we started getting complains that the colours in the video seemed ‘washed out’, ‘faded’, ‘dull’. png images, with the virtual framebuffers and the result is the same.) The above converts a sequence of images ( ‘image001.png’, ‘image002.png’) to a yuv420 chroma sub-sampled H.264 video at the standard 25 frames per second.

The simplified FFmpeg command for stitching a video from a sequence of images is - ffmpeg -i img%03d.png -pix_fmt yuv420p video.mp4 (It might have minute differences, but for the scope of this discussion, we can assume that it’s the same.)

png images, we are just piping ‘virtual images’. Now this operation is very similar to taking a sequence of. Let’s also note here that all InVideos are rendered in HD resolution.

A virtual framebuffer is just another fancy term for - the array of RGB values corresponding to the pixels of the frame of the video. mp4 video created on InVideo involves piping a sequence of virtual framebuffers, containing the information of each frame of the composition, to the FFmpeg encoder, which sequentially stitches them into a video with standard H.264 encoding. Talking About Colorspaces and FFmpeg Video Rendering at InVideo

Ffmpeg encode yuv to h264