Posted 08 December 2016 - 01:39 PM
As Phil points out, it's really a software/encoding glitch. I encode stuff every day and it looks flawless.
I've found the base level mpeg 4 engine to really suck. This is what many windows based software packages use as their "compression" type for making smaller files. It's only when you get into the .h264 engine, that things really become substantially better.
On the mac side, .h264 is standard, it's the base level compression. Since it uses the quicktime engine to encode, Apple can control the quality with automatic software updates, rather then customers downloading new versions of software constantly. In 2012, Apple released an all-new version of Compressor, which is the widest used program for transcoding on mac's. It has an all-new .h264 engine that works really well, though it's dog-ass slow. At 15,000Mbps (which is what I compress most of my media at for upload) double pass, advanced profile, 1080p, 23.98, if you put the Pro Res master and the .h264 next to each other, there is very little difference between the two. The .h264 is slightly softer and there are some motion related artifacts (adds to the softness), which only a trained eye could see. Also, the colors aren't as vibrant, they're a bit muted on the compressed version. But that's comparing the two files on a $30,000 color grading monitor. On your home computer screen, they will look identical. If mac's didn't automatically display file sizes constantly, I wouldn't know the difference between the two on my computer.