BtbN changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.0 is released
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<MisterMinister>
BtbN: when running 32 cameras on the same saerver every core counts ))
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<BtbN>
yes? And why then waste an entire core to run some simple logo fade-in via a browser?
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<peppi>
I'm doing a top and I see the ffmpeg is using 25% of the cpu. Is there any way to reduce the CPU by moving computing to the GPU? Or how do I reduce the cpu usage while using ffmpeg?
<beastd>
peppi: What are you doing with that command line?
<peppi>
not sure if I need to yet
<peppi>
beastd, I'm streaming video from my "webcam" then using it on my computer for video calls
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<beastd>
dunno. not sure how it all works, but I would guess that scaling will happen as required in the software that is presenting the video call. so i probably wouldn't scale beforehand.
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<StephenLynx>
i dont get anything as far as logs go.
<StephenLynx>
im using av_read_frame, then I check inputFrame->best_effort_timestamp and if is not on the point I want, I loop again back to read_frame
<StephenLynx>
i dont seem to be able to get anything around past half.
<StephenLynx>
on a 50s video.
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<beastd>
StephenLynx: are you corectly converting best_effort_timestamp to seconds?
<StephenLynx>
im comparing against the timestamp I use on av_seek_frame beastd
<StephenLynx>
and they seem to be on the same scale.
<StephenLynx>
1st step is to use seek_frame so I jump to a keyframe before the part I want. 2nd step is to ignore frames on the loop that haven't reached the point I wanted.
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<StephenLynx>
so, how do I convert to the base I should use? Im using inputFormatContext->duration * (stream->time_base.den / stream->time_base.num) / AV_TIME_BASE / (100 / percentage);
<StephenLynx>
but the results are bananas.
<StephenLynx>
percentage is an int.
<StephenLynx>
at 60% it jumps to 4752000
<StephenLynx>
and stays there.
<StephenLynx>
while 50% is 2376000
<StephenLynx>
duration is 52800000
<StephenLynx>
ok, i neede percentage to be a float.
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<peppi>
kepstin, I suppose
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<Marth64>
use av_rescale_q ?
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<Marth64>
(StephenLynx)
<StephenLynx>
wat
<StephenLynx>
that was not the issue.
<Marth64>
for converting time base
<StephenLynx>
my calculation was correct, the issue was dividing by an int.
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<noelle>
It seems like the static builds @ https://johnvansickle.com/ffmpeg/ (linked from ffmpeg.org) aren't keeping up with git master. Anyone know of another reliable source of precompiled static builds for linux?