How to shift the hue
1. Drop a video you already have. A photo or an audio file is refused here. 2. Leave 180 degrees, or pick 90 or 270. 3. Press “Shift hue” and download the MP4.
GustKit runs the FFmpeg hue filter. 180 turns a red patch toward cyan. 90 and 270 turn the wheel the other way around. Width and height stay the same. A soundtrack is encoded again in AAC and stays in step. Flip video mirrors the picture with hflip or vflip and does not turn the colors.
A turn of the color wheel, not a grade
Color grade tints the frame with eq and curves. RGB split slides red and blue apart. Invert colors flips each channel in place. Hue rotate does this turn on a photo. This page does it on a short clip and saves MP4. It does not crop the frame and it does not change the speed.
The video stays in this tab
FFmpeg runs in this browser, on one thread. GustKit does not fetch a video from a link. Leave the tab open until the download appears. Close it and the file is gone. Clips up to the limit shown next to the button.
How to check the hue
1. Play the download next to the original. 2. A red patch should move around the color wheel. 180 should push it toward cyan. 3. If the download is not MP4, or the frame size changed, you opened a different page.
Flip video mirrors the picture and leaves the colors. This page runs FFmpeg hue, keeps the frame size, and saves MP4. Nothing is uploaded.