Why in compressor can I only select the same number of instances (both 1) on 2017 imac (4 cores, 40Gb)and on 2021 powerbook pro 16 (10 cores, 16 Gb). According to the helppage it must be 0 en 1 or 1 and 2 instances.
Thank you for the respons. This could be the reason. My iMac is 4 core with hyperthreading, makes 8 cores.
The manual: "The number of available Compressor instances is determined by your computer’s cores and memory. After meeting the minimum system requirement (four cores and 2 GB of memory), you can add one additional instance for every additional four cores and 2 GB of memory."
So my M1 pro gets the same additional instance as the iMac, both get one. And you have 3.
I've tested both systems with a 20 sec. mp4 from a small camera. The M1 is about twice as fast encoding HEVC but to my surprise H264 on iMac is a little faster. Maybe because the M1 produced a movie with a bitrate of 70.000 kbps although both where set on a fixed bitrate of 50.000 kbps.
The instances doesn't seem to make any difference for single file, it does make a difference selecting multiple files to a batch. In my small test about 20% faster.
As an amateur I don't need the speed anyway but I'm glad that your mentioning of the hyperthreading solved the problem and let me sleep in peace tonight!
Thank you for the respons. This could be the reason. My iMac is 4 core with hyperthreading, makes 8 cores.
The manual: "The number of available Compressor instances is determined by your computer’s cores and memory. After meeting the minimum system requirement (four cores and 2 GB of memory), you can add one additional instance for every additional four cores and 2 GB of memory."
So my M1 pro gets the same additional instance as the iMac, both get one. And you have 3.
I've tested both systems with a 20 sec. mp4 from a small camera. The M1 is about twice as fast encoding HEVC but to my surprise H264 on iMac is a little faster. Maybe because the M1 produced a movie with a bitrate of 70.000 kbps although both where set on a fixed bitrate of 50.000 kbps.
The instances doesn't seem to make any difference for single file, it does make a difference selecting multiple files to a batch. In my small test about 20% faster.
As an amateur I don't need the speed anyway but I'm glad that your mentioning of the hyperthreading solved the problem and let me sleep in peace tonight!
I can add 3 instances in my 2019 MBP (intel 8-core).
I will have to try in a few days how many are allowed in an M1 Max mac (I will probably only be able to test that some time next week, though).
It may be that the reason I can get more is because of hyperthreading (the 8 cores present themselves as 16 "logical cores" to the OS).
I was able to connect to an M1 Max using screen sharing and I confirm that it too allows for 1 additional instance
(which is consistent with your experience because the M1 Max has the same 10 cores as the M1 Pro).
Problem solved. Thanks!
number of instances in compressor the same on imac 4 core and powerbook 10 core?
