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FFMPEG seems to slow down as it goes along processing a video. I was processing a video for about 10 minutes and it started out at about 3x speed and went down to about 2.5x by the end.
Specs:
i5-8600k
16GB RAM
2070 (although wasn't using GPU)
On an SSD
Seems to happen with any kindof script or instruction.
Isn't a CPU heat issue, never goes above 60 degrees and drops to 30 degrees 2 seconds after the program is finished.
Edit: Just noticed something else: it slows down a lot in the first 10 or so seconds. So it might starts at 10x and rapidly drop to 3.2x, and then it will slowly drop once it gets there.
Edit 2: Happens in Handbrake too. Don't have any other video programs to test really.
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Last edited by bradwiggo; 30th Jun 2021 at 18:32.
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Something else in the PC competing for the CPU?
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No CPU is about 1-4% before starting it.Originally Posted by davexnet
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This can be normal - prediction of speed depends on overall complexity - at the end prediction is close to real...
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It's either video complexity rising or thermal throttling
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