FFmpeg DeckLink output freezes after a few seconds with no error message

[rm-tech-git]

Hi, thank you for providing this FFmpeg build with DeckLink SDK support — it’s been very helpful.

I’m currently encountering an issue when testing video playback to a DeckLink 8K Pro card. The video starts playing correctly, but after about two seconds it freezes on a single frame. There’s no error message indicating a problem, and the process keeps running, but no new frames are sent to the DeckLink device.

Here’s the command I used:

ffmpeg -re -hide_banner -stream_loop -1 -i input.mp4 -f decklink -format_code Hp50 -pix_fmt uyvy422 "DeckLink 8K Pro (1)"

Could you please advise if there’s a known issue or configuration step I might be missing?

[AnimMouse]

Unfortunately, I don't have a DeckLink device to debug this problem, and since this repository only builds on what rdp/ffmpeg-windows-build-helpers has, I recommend that you create an issue separately on https://gitlab.com/m-ab-s/decklink-headers about this bug.