Mixing
setting cpu thread in ffmpeg
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I have a PC 24 Thread and when I use ffmpeg I only use 25% of my CPU usage. so how can all of these 24 threads be used? so my CPU usage reaches 100%, because if it's 25% it's still a slow process
example:
ffmpeg -i video01.mkv -i watermark.png -filter_complex "overlay = 10: 10" output01.mkv
how to set 24 cpu threads?
video ffmpeg encode
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
add a comment |
I have a PC 24 Thread and when I use ffmpeg I only use 25% of my CPU usage. so how can all of these 24 threads be used? so my CPU usage reaches 100%, because if it's 25% it's still a slow process
example:
ffmpeg -i video01.mkv -i watermark.png -filter_complex "overlay = 10: 10" output01.mkv
how to set 24 cpu threads?
video ffmpeg encode
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
by default it uses (IIRC) 1.5x threads as you have cores but you can force a specific number of threads with-threads 0... what OS (Windows or Linux), processor and ffmpeg version (32 or 64 bit) are you using?
– Offbeatmammal
Jan 3 at 21:33
i using dedicated server windows 2012, spesification intel xeon 24 thread ram 104 GB
– Amy Bomer
Jan 4 at 15:34
add a comment |
I have a PC 24 Thread and when I use ffmpeg I only use 25% of my CPU usage. so how can all of these 24 threads be used? so my CPU usage reaches 100%, because if it's 25% it's still a slow process
example:
ffmpeg -i video01.mkv -i watermark.png -filter_complex "overlay = 10: 10" output01.mkv
how to set 24 cpu threads?
video ffmpeg encode
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
I have a PC 24 Thread and when I use ffmpeg I only use 25% of my CPU usage. so how can all of these 24 threads be used? so my CPU usage reaches 100%, because if it's 25% it's still a slow process
example:
ffmpeg -i video01.mkv -i watermark.png -filter_complex "overlay = 10: 10" output01.mkv
how to set 24 cpu threads?
video ffmpeg encode
video ffmpeg encode
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
asked Jan 3 at 10:03
Amy BomerAmy Bomer
73
73
by default it uses (IIRC) 1.5x threads as you have cores but you can force a specific number of threads with-threads 0... what OS (Windows or Linux), processor and ffmpeg version (32 or 64 bit) are you using?
– Offbeatmammal
Jan 3 at 21:33
i using dedicated server windows 2012, spesification intel xeon 24 thread ram 104 GB
– Amy Bomer
Jan 4 at 15:34
add a comment |
by default it uses (IIRC) 1.5x threads as you have cores but you can force a specific number of threads with-threads 0... what OS (Windows or Linux), processor and ffmpeg version (32 or 64 bit) are you using?
– Offbeatmammal
Jan 3 at 21:33
i using dedicated server windows 2012, spesification intel xeon 24 thread ram 104 GB
– Amy Bomer
Jan 4 at 15:34
by default it uses (IIRC) 1.5x threads as you have cores but you can force a specific number of threads with
-threads 0 ... what OS (Windows or Linux), processor and ffmpeg version (32 or 64 bit) are you using?– Offbeatmammal
Jan 3 at 21:33
by default it uses (IIRC) 1.5x threads as you have cores but you can force a specific number of threads with
-threads 0 ... what OS (Windows or Linux), processor and ffmpeg version (32 or 64 bit) are you using?– Offbeatmammal
Jan 3 at 21:33
i using dedicated server windows 2012, spesification intel xeon 24 thread ram 104 GB
– Amy Bomer
Jan 4 at 15:34
i using dedicated server windows 2012, spesification intel xeon 24 thread ram 104 GB
– Amy Bomer
Jan 4 at 15:34
add a comment |
1 Answer
1
active
oldest
votes
It is designed so that you can still use your system for other processes. The comment explains how to manipulate ffmpeg thread behavior. If you ask me, default ffmpeg behavior is pretty good. It allows multiple encoding and decoding on same system with running separate ffmpeg processes.
If you tell me that system will do only "this" job in it's lifetime, than this PC probably an overkill for this job.
And finally, according to Amdahl's law, using too many threads may not yield linear performance speed-up either.
Hope that helps.
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It is designed so that you can still use your system for other processes. The comment explains how to manipulate ffmpeg thread behavior. If you ask me, default ffmpeg behavior is pretty good. It allows multiple encoding and decoding on same system with running separate ffmpeg processes.
If you tell me that system will do only "this" job in it's lifetime, than this PC probably an overkill for this job.
And finally, according to Amdahl's law, using too many threads may not yield linear performance speed-up either.
Hope that helps.
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
add a comment |
It is designed so that you can still use your system for other processes. The comment explains how to manipulate ffmpeg thread behavior. If you ask me, default ffmpeg behavior is pretty good. It allows multiple encoding and decoding on same system with running separate ffmpeg processes.
If you tell me that system will do only "this" job in it's lifetime, than this PC probably an overkill for this job.
And finally, according to Amdahl's law, using too many threads may not yield linear performance speed-up either.
Hope that helps.
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
add a comment |
It is designed so that you can still use your system for other processes. The comment explains how to manipulate ffmpeg thread behavior. If you ask me, default ffmpeg behavior is pretty good. It allows multiple encoding and decoding on same system with running separate ffmpeg processes.
If you tell me that system will do only "this" job in it's lifetime, than this PC probably an overkill for this job.
And finally, according to Amdahl's law, using too many threads may not yield linear performance speed-up either.
Hope that helps.
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
It is designed so that you can still use your system for other processes. The comment explains how to manipulate ffmpeg thread behavior. If you ask me, default ffmpeg behavior is pretty good. It allows multiple encoding and decoding on same system with running separate ffmpeg processes.
If you tell me that system will do only "this" job in it's lifetime, than this PC probably an overkill for this job.
And finally, according to Amdahl's law, using too many threads may not yield linear performance speed-up either.
Hope that helps.
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
answered Jan 4 at 7:35
the kamilzthe kamilz
8441613
8441613
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
add a comment |
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
means there is no solution to speed up encoding?
– Amy Bomer
Jan 4 at 15:35
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
I would try adjusting the threads parameter (as per original comment) and experiment. Do make sure you're running latest version of ffmpeg, and watch sysmon to make sure you're not getting gated on something like disk I/O.
– Offbeatmammal
Jan 4 at 21:24
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
@AmyBomer is that a NUMA system (kinda means the main board has multiple cpus installed on different sockets, probably two on your system) ?
– the kamilz
Jan 5 at 16:04
add a comment |
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by default it uses (IIRC) 1.5x threads as you have cores but you can force a specific number of threads with
-threads 0... what OS (Windows or Linux), processor and ffmpeg version (32 or 64 bit) are you using?– Offbeatmammal
Jan 3 at 21:33
i using dedicated server windows 2012, spesification intel xeon 24 thread ram 104 GB
– Amy Bomer
Jan 4 at 15:34