Your system information

• Steam client version (build number or date): 1782437068
• Distribution (e.g. Ubuntu): Debian
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes
• Steam Logs:

Starting export preview of clip clip_2379780_20260701_100020
Exporting/previewing from MPD files /home/robo/.steam/debian-installation/userdata/460096032/gamerecordings/clips/clip_2379780_20260701_100020/video/bg_2379780_20260701_055733/session.mpd
[preview] Starting for export
[preview] Completed for file (1ms)
Preview finished

• GPU: AMD

Please describe your issue in as much detail as possible:

Selecting certain (low) encoding settings shows/outputs incorrect size preview and format:
https://github.com/user-attachments/assets/a8be3b27-6803-4e9b-a714-54f4572f1173

Possibly related: https://github.com/ValveSoftware/steam-for-linux/issues/11849 (I have this issue too, but this bug in the UI happens before even trying to export)