search

transitive-bullshit / ffmpeg-concat

Concats a list of videos together using ffmpeg with sexy OpenGL transitions.
885 stars 116 forks source link

difference between ffmpeg-concat and gl-transition demo #34

Open chenke opened 6 years ago

chenke commented 6 years ago

Let's take "angular" transition as an example. gl-transition demo is here. transition start from 12 o'clock, rotate anticlockwise . image

i use ffmpeg-concat "angular" transition, cmd is "ffmpeg-concat -t angular -d 750 -o huzzah.mp4 0.mp4 1.mp4" transition start from 6 o'clock, rotate clockwise

image

i has checked angular.glsl, there is no difference.

so why this happen?

transitive-bullshit commented 6 years ago

It seems that internally the images are flipped vertically as they are passed to OpenGL in terms of how the data is stored in memory.

This shouldn't be a hard thing to fix.

PRs welcome :)

laranjaquadrada commented 3 years ago

I've noticed this with the slideUp going down and vice-versa slideDown going up...