ffmpegfix
the trick is measuring in *FPS*, not seconds.


Intel Core i7-6700K: 

	Processor: Intel Core i7-6700K @ 4.00GHz (4 Cores / 8 Threads), Motherboard: MSI Z170A GAMING PRO (MS-7984) v1.0 (1.D0 BIOS), Chipset: Intel Xeon E3-1200 v5/E3-1500, Memory: 16384MB, Disk: 2000GB Seagate ST2000DM001-1ER1 + 1000GB External USB 3.0 + 2000GB External USB 3.0 + 2000GB My Passport 2599, Graphics: AMD Radeon Vega Frontier Edition 16384MB (1150MHz), Audio: Realtek ALC1150, Monitor: LG Ultra HD, Network: Intel Connection

	OS: Arch Linux, Kernel: 4.17.9-1-zen (x86_64), Desktop: KDE Plasma 5.13.3, Display Server: X Server 1.19.6, Display Driver: modesetting 1.19.6, OpenGL: 4.5 Mesa 18.1.4 (LLVM 6.0.1), OpenCL: OpenCL 2.1 AMD-APP (2580.4), Compiler: GCC 8.1.1 20180531 + Clang 6.0.1 + LLVM 6.0.1, File-System: ext4, Screen Resolution: 3840x2160

ffmpeg-fixing: 

	Processor: Intel Core i7-6700K @ 4.00GHz (4 Cores / 8 Threads), Motherboard: MSI Z170A GAMING PRO (MS-7984) v1.0 (1.D0 BIOS), Chipset: Intel Xeon E3-1200 v5/E3-1500, Memory: 16384MB, Disk: 2000GB Seagate ST2000DM001-1ER1 + 2000GB External USB 3.0 + 1000GB External USB 3.0 + 2000GB My Passport 2599, Graphics: AMD Radeon Vega Frontier Edition 16368MB (1150MHz), Audio: Realtek ALC1150, Monitor: LG Ultra HD, Network: Intel Connection

	OS: Arch Linux, Kernel: 4.18.5-rt3-1-rt-bfq (x86_64), Display Server: X Server 1.20.1, Display Driver: modesetting 1.20.1, OpenCL: OpenCL 2.1 AMD-APP (2580.4), Compiler: GCC 8.2.1 20180831 + Clang 6.0.1 + LLVM 6.0.1, File-System: ext4, Screen Resolution: 1920x1080


FFmpeg 3.4.1
H.264 HD To NTSC DV
Frames Per Second > Higher Is Better
Intel Core i7-6700K . 343.86 |=================================================
ffmpeg-fixing ....... 223.72 |================================