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From time to time I've noticed that while watching a video the FPS will go from playing perfectly at ~ 24 FPS to what appears to be about 12 or 15 FPS. Although this issue only lasts for a second or two, it does happen from time to time and is somewhat distracting. All of my videos are my own DVD and Blu-ray rips.
Is there any way to completely fix this so that XBMC plays the video at a "consistently consistent" frame rate?
XBMC 10
Ubuntu 10.10
Latest nVidia drivers (ION)
Toshiba Regza 40"
Pioneer 5080 Kuro
My Theater: JVC X790R + Peerless PRG-UNV | 120" CineWhite UHD-B Screen | KODI Nexus + PreShow Experience | mpv | madVR 204 RTX 2070S | Panasonic UB420 | Denon X3600H @ 5.2.4 | 4 x ADX Maximus w/ Dayton Audio SA230 | 3 x Totem Tribe LCR + Mission M30 Surrounds + SVS PC2000 + Monolith 15 | 40" HDTV w/ Z83 + MoviePosterApp | 40TB Win10 SMB Server over Gigabit Ethernet
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Does this happen @ 60Hz too? I had a similar issue with a Shuttle XS35GT @ 24Hz using either OpenELEC or XBMC Live. But i think 60Hz was alright. Could not really fix the 24Hz issue so i returned it.
BTW: Do you experience some frame drops while watching the movie? Press "o" to see.
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When I turn on the deinterlacing this happens to me too. When I turn it off it works fine. Maybe this helps for you?
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Sadly I can confirm that that thread will most likely not fix it. There are numerous people that seem to have this strange "slomo" fps drop weirdness going on since XBMC 10, and no matter what judder free playback guide I use, I can not get rid of it, nor did any of the other people that have posted recently about it.
I'm quite sad about this really as I have top notch hardware that is able to play any file flawlessly, and it seems to me the problem is ignored or deemed not important enough to pay attention to.
I'm still hoping that someone will find the problem though so I can finally get rid of this annoying "slomo"/drops/skips problems.
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I will do more testing to confirm.
I hope this could be officially addressed in a 10.1 update.
My Theater: JVC X790R + Peerless PRG-UNV | 120" CineWhite UHD-B Screen | KODI Nexus + PreShow Experience | mpv | madVR 204 RTX 2070S | Panasonic UB420 | Denon X3600H @ 5.2.4 | 4 x ADX Maximus w/ Dayton Audio SA230 | 3 x Totem Tribe LCR + Mission M30 Surrounds + SVS PC2000 + Monolith 15 | 40" HDTV w/ Z83 + MoviePosterApp | 40TB Win10 SMB Server over Gigabit Ethernet
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if you know how to compile from source, you might want to try some patches i am working on. it reduced my lost frame rate from approx. 200/hour to 0 (1080i50). this is true at least on my system: zotac 9300-itx, ubuntu 10.10, GT220. i have done some testing on ION II, which showed good results as well.
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Hammi
Senior Member
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Are you planning to submit those patches into the XBMC code or discuss with the developers?
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Of course, I will submit this patches to the xbmc team.
1)
I think there is a synchronization issue between the video thread and the render thread. I was able to resolve this on my system but am really not sure if this would help in general. It might even get worse on other systems, hopefully not, but possible. It is quite difficult to track down timing issues.
2)
Improvements in VDPAU through introduction of vdpau opengl interop and asynchronous processing. It primarily improves performance for interlaced content.
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bobo1on1
cheapass Team-XBMC Developer
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Which video thread? We have several.
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Well, the link I posted earlier seems to help, but I do still experience the FPS drop. :/
My Theater: JVC X790R + Peerless PRG-UNV | 120" CineWhite UHD-B Screen | KODI Nexus + PreShow Experience | mpv | madVR 204 RTX 2070S | Panasonic UB420 | Denon X3600H @ 5.2.4 | 4 x ADX Maximus w/ Dayton Audio SA230 | 3 x Totem Tribe LCR + Mission M30 Surrounds + SVS PC2000 + Monolith 15 | 40" HDTV w/ Z83 + MoviePosterApp | 40TB Win10 SMB Server over Gigabit Ethernet