James: > I think the runtime is working, but this is the testcase from the SIGBUS > bug which you can use: > > ffmpeg -f lavfi -i testsrc=s=32x32:d=0.1 -strict -2 -c:v libx264rgb -f avi > libx264rgb.avi -y -hide_banner -nostdin > ffmpeg -strict -2 -i libx264rgb.avi -t 1 -c:v rawvideo -c:a pcm_s32le -f nut > /dev/null -y -hide_banner -nostdin > > Since the SIGBUS bug occurs in NEON code, if the runtime detection is > working, this will _only_ fail on machines with NEON and work on > non-NEON machines.
This bug was closed while I was sleeping, but I will mention anyway that with 7:3.3.3-1 those commands give a SIGBUS, as expected, but only if /proc is mounted. Presumably with the fixed version, 7:3.3.3-2, performance will be measurably worse on a system with NEON when /proc is not mounted. Upstream should probably switch to using getauxval(). Do you want to suggest it to them?