![]() To change from H.264 to HEVC, I changed the Codec selection. Here are the settings I used for Compressor – all based on the default settings in Video Sharing Services > HD 720p. This prevented any delays caused by external storage. All compressed files were stored back to the same drive. I compressed the same three files – XDCAM EX, ProRes 422 HQ and ProRes 4444 – into H.264, HEVC 8-bit and HEVC 10-bit formats. Compression timings were reported automatically by the software.Īll files were stored on the internal Fusion drive of the iMac. So, the timings for Compressor 4.4.4 reflect real-world use, while Compressor 4.4.5 timings represent an ideal environment. Keep in mind that in any real-world situation, you would have Compressor running along with a variety of other applications. The result of this is that Compressor 4.4.4 reported slower times than it would if it were the only application running. I didn’t discover this error until after I upgraded to the new version, at which point it was no longer possible to go back. Since Compressor actually uses a background process to compress media, the more applications that are running, the slower the background process will run. I made an error in testing the earlier version of Compressor (4.4.4) in that I had other applications running while I was timing the test. (When it comes to compression, an i7 is significantly faster than an i5.) So the speeds of this test can’t be directly compared to past years. While the CPU speed is faster, the i7 supports hyper-threading, while the i5 does not. However, this year, I transitioned from a 2013 i7 iMac to an 2017 i5 iMac. I made it a point to use the same three test files for the last several years so that we could compare results. Here’s a link to my most recent test before this one. NOTE: I first began testing compression speed in 2014. This isn’t top of the line by any means, but it is typical of the systems of many of us. Here’s the system I used for testing: a 2017 27″ iMac with an i5 CPU. As that system has not yet been released, I have no way to verify the performance difference. NOTE: Apple’s release notes indicate that many of these performance enhancements are designed to optimize Compressor for the upcoming 2019 Mac Pro. You’ll find a link to a PDF containing all my timings in the Extra Credit section below.
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