hum,
it looks related to a licence issue ;-(
config BR2_PACKAGE_FFMPEG_NONFREE
bool "Enable nonfree code"
help
allow use of nonfree code, the resulting libs and binaries
will be unredistributable
ifeq ($(BR2_PACKAGE_OPENSSL),y)
openssl isn't license compatible with GPL
ifeq ($(BR2_PACKAGE_FFMPEG_GPL)x$(BR2_PACKAGE_FFMPEG_NONFREE),yx)
FFMPEG_CONF_OPTS += --disable-openssl
else
FFMPEG_CONF_OPTS += --enable-openssl