[BUG] Intro videos are cut off during boot-up

[SoulCircle]

MessedUpVideo.mp4

GZDoom version

4.12+

Which game are you running with GZDoom?

Doom 2

What Operating System are you using?

Windows 11

Please describe your specific OS version

Windows 11 Home - Reproduced on WIndows 7 64 Bit as well

Relevant hardware info

Not Relavent

Have you checked that no other similar issue already exists?

• I have searched and not found similar issues.

A clear and concise description of what the bug is.

It occurs when starting GZDoom up every time and is worse depending on if the load takes longer or not. The video at the startup of the mod is cut off by the load screen at the beginning, leaving only the last few frames to be seen. We use this for a mod called Doom Infinite for a logo splash for our group, which on any of our machines, the logo can only be seen for a split second without the beginning of the animation video.

The video is a WebM file encoded with ffmpeg using IVF format and had worked on version before 4.12

Steps to reproduce the behaviour.

Explain how to reproduce

1. Load mod that has splash intro video
2. Watch as it gets cut off

Your configuration

https://gist.github.com/SoulCircle/f269310643a18416ca227c153515b075

Provide a Log

Here's the Log

[RicardoLuis0]

is it also broken in vkdoom? gzdoom is using a much older version of the launcher/etc code

[SoulCircle]

is it also broken in vkdoom? gzdoom is using a much older version of the launcher/etc code

I've tested it there and yes the exact same thing happens. It seems it's caused by the exact same issue, I've provided a video with comparisons between 4.11 and 4.15 in an edit that shows what it does specifically.