It may work or break it completely ... apply by normal patch command from inside thirdparty/ffmpeg (may be "cat pathname | patch -p1", may be "cat patchname | patch -p0") or edit libavcodec/qsvenc.c by hand. rebuild ffmpeg, do not do make clean, cd ../../ so you again in main directory with ./autogen.sh and bin directory with cinelerra. touch cinelerra/ffmpeg.C make Hopefully this rebuild cin so on next start from bin/cin you will have something to test with tff sources. Unfortunately, netBSD does not support hardware virtualization on AMD cpus, so for now I do not have my virtual machines. I also forgot type of cable from PSU to disks, so now I can only power up one of two sata drives. It will be fixed eventually, but for now I hope to live up this netBSD install a bit ...