Why does my video show wrong colors after import into after effects? I would like to edit a video, but as I import it into AfterEffects it does not show the correct colors. VLC does show the correct colors. It's not the codec, because h264 is supported by aftereffects. It is not the edit lists. The imported video looks like this.

I suspect alpha has somethin to do with it, because if I decativate alpha (ALT + 4) the screen becomes white.

After rendering it still looks like this.

I'm at a loss where to look for the cause, please give me some hints where this is coming from and/or how to get rid of it.
I'd recommend trying to convert the source file to another file type before importing into After Effects.
Maybe try the media encoder, vlc or an ffmpeg variant.
If you can, convert to an intermediate mov-codec or an image sequence like tiff.
If your file seems fine in VLC etc. this might work.