Squeezed video

[fuxifex]

Hi, i ran into issues with a movie (Possession from 1981) - it's a .mkv with 1800x1080 resolution and it rendered wrong: the image is upright and squeezed.

general question: does it make sense to render a video with 100fps? i mean, would you notice a difference between 50 and 100 fps?

[DaGooseYT]

"Make sense" is subjective on the basis on how you want to use the interpolated video. If your monitor's refresh rate is 100Hz or evenly divisible by 100Hz (by a factor of 2), then yes you might notice a difference. If your monitor isn't clocked at 100Hz or evenly divisible by 100Hz then the interpolated video will appear choppy.

[mirh]

I don't really think most people can even just notice a 16ms doubled frame Also, I would guess that if you could toggle v-sync off you'd definitively notice the improvement too. So everything can always stand to improve.. assuming the interpolation isn't poor in the first place.

Anyhow, putting aside 1800x1080 is surely an odd resolution for a movie (and 1075x714 for your screenshot), this has probably to do with the aspect ratio metadata that could be hidden just about anywhere in a file. Since d4b4f38a5a4c44548a749c2bc77da7c8944382d3 at least, there should no problems parsing display_aspect_ratio from the video stream. But maybe your source had it encoded at the container level? Or maybe there was some other trickery.