… for Codecs & Media
Tip #108: Speed Test: i5 vs. i7 CPUs for Video Compression
Conventional Wisdom says bet on the i7
In a series of tests that I ran comparing the speed of Apple Compressor 4.4.5 running on a 3.8 GHz i5 vs. a 3.2 GHz i7, I discovered that you can’t predict which processor will be faster.
Testing involved XDCAM EX, ProRes 422 HQ and ProRes 4444 media and compressing it into H.264, 8-bit HEVC and 10-bit HEVC. (The three test files had different durations, so we can’t compare speed between formats.)
H.264 and HEVC 8-bit are hardware-accelerated. HEVC 10-bit is not. I used the same compression settings for each test.
- When compressing media for H.264, the i7 is faster 33% of the time (2 out of 6).
- When compressing media for HEVC 8-bit, the i7 is faster 66% of the time (4 out of 6).
- Both CPUs running Apple Compressor were unable to successfully compress a ProRes 4444 file into 10-bit HEVC.
Based upon these tests with the latest version of Compressor, I would say the speed is a wash. Some tasks are faster, some are slower.
However, if you are doing any HEVC compression – 8-bit or 10-bit – based on my full suite of tests, Adobe Media Encoder is consistently and significantly faster than Apple Compressor.
Here’s the full report.