Pi4 doesn't want to switch to 25fps. 1920x1080@25 movies play in 1920x1080@50. When I force the gui to 25 fps and on the whitelist select only the resolution 1920x1080@25. I found a workaround when I force the interface to 25 fps and select only 1920x1080@25 resolution on the whitelist.
[RPi4] Can't Auto-Switch Frame Rate from 50Hz to 25Hz
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krisux -
May 18, 2025 at 2:09 PM -
Thread is Resolved
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Enable debug logging, play the video and post the log here.
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Pi4 doesn't want to switch to 25fps. 1920x1080@25 movies play in 1920x1080@50.
And what is wrong with this? - See https://wiki.libreelec.tv/configuration/4k-hdr - Unless you are never going to play interlaced media rate doubling should be enabled, and a side effect of this is 25fps media playing at 50fps, which is harmless.
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I lose frames at 50 refresh rate
What happens if you disable deinterlacing?
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Have 2 movies in 1080i@25 resolution
Then Kodi playing at 50fps is correct, because Kodi only outputs progressive, so it must render each interlaced (half) frame as a full progressive frame and you need 50 frames to account for 25 interlaced frames.
I lose frames at 50 refresh rate
I normally recommend people re-rip from the original media when the encoding is bad, but you've stolen a movie off the internet that's been ripped into a lossy interlaced format. I guess that made sense to the original pirate that created and shared it.
The only issue I can see is that you're expecting a lossy pirate rip to be high quality
