Transcode causing pixelization

I’m currently working on a game where I need to use videos with the transcode option but the result of the video is pixelated after being transcoded. To be more precise the video I’m using is a .webm 460X1080. I also tried with a .mp4 of the same dimension, the source video is clean and after the transcoding the video is pixelated.

  • The video is created with a bunch of .tga image. I tried convert the .tga into .png before creating the video but I get the same results.

  • I have tried upscaling the video with AI before transcode. I get a better result but when I downscale to the resolution I need, the result is still bad.

Also in my project I have lots of videos with same resolution in .webm (I used the same method) and some have good quality, some get pixelated.

For NDA reason I can’t provide video and file examples.