2017-02-24 8:08 GMT+01:00 Vivek Jain <vivek.jain at mindtickle.com>: > ffmpeg -safe 0 -f concat -i /tmp/config.txt -i /tmp/audio.mp3 -y -pix_fmt > yuv444p -shortest /tmp/out_ffff.mp4 Missing time and / or benchmark option. Please also try with -threads 1 and different values for -threads. Carl Eugen