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23rd April 2020, 21:27 | #1 | Link |
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Seeking Lag - Causes And How To Avoid/Prevent It
So, this is something that confuses me. Shadowplay recordings that I make have a bitrate of 50 Mbps, but still seek fast and smoothly. But, for some reason I cannot figure out, H.264 videos I encode with MEGUI and mux into an MP4 container, have an annoying lag when I use forward or backward seeking. I know that MKV container has little to no lag, but is there any encoding and/or player settings I should tweak, to get rid of the seeking lag with MP4 container?
My CPU is AMD Ryzen 5 3600, my GPU is NVIDIA Geforce GTX 970, and I have 16GB RAM.
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24th April 2020, 06:07 | #2 | Link |
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Reduce --keyint value maybe?
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24th April 2020, 20:30 | #3 | Link |
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Where do I find that? MPC-HC or MEGUI?
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24th April 2020, 22:45 | #5 | Link |
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Default minimum is 25, and default maximum is 250. What would be optimum lower settings?
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24th April 2020, 23:28 | #6 | Link |
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I would go for minimum and maximum 25 and closed GOPs. Sure, it will be a bigger file but with multiterabyte drives these days...
I'm sure others will chime in to tell me I'm wrong. Anyway, it's just a hypothesis right now that the problem is GOP size. Try the above and see if it affects things. If not, we can look at other possibilities. Last edited by videoh; 24th April 2020 at 23:31. |
24th April 2020, 23:58 | #7 | Link | |
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Quote:
Thank you for the suggestion .
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25th April 2020, 00:22 | #9 | Link | |
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Quote:
Edit: I have settled on the values 3 and 30.
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25th April 2020, 15:24 | #11 | Link |
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Keep in mind that very low value may introduce that annoying frame pulsing effect (key-frame injection) in static scenes. Besides 2-5 range looks ridiculously low! You are basically injecting key-frame every 5 frames. Even blu-ray movies use larger value (24=1s)
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26th April 2020, 23:30 | #12 | Link |
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Videos which I had encoded without setting the keyint, they have a minimum of 60 GOP and maximum of 600 GOP. Makes me want to replay and re-record some of my video game playthroughs. Also, since I do not use keyframe seeking, the smaller GOP does not affect me at all, right?
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3rd May 2020, 01:49 | #14 | Link |
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I was talking about MPC-HC's different seeking speeds. It has small, medium, and large jumps, all of which can be adjusted, and it has keyframe jumps. MPC-HC's default settings has a keybind for the keyframe seeks (Shift+Arrow I think). I disable those two keybinds, and only use the small, medium, and large jumps. So, does changing the GOP values also change the length of the keyframe seeks?
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