x264-mem+
Intel Core i7-3520M testing with a LENOVO 2353CTO and Intel HD 4000 on Ubuntu 15.10 via the Phoronix Test Suite.
HTML result view exported from: https://openbenchmarking.org/result/1511058-KH-X264MEM5197.
x264
H.264 Video Encoding
Phoronix Test Suite v10.8.4