Hi Paul, I'm not sure if you have extra time. But I think you are correct. We might need to report the bug to ffmpeg.
I'm not sure if we can simplify the test.Like just run "ffplay test_raw.avi" or "ffmpeg -i test_raw.avi out.mp4" to see if it has the bus error as well.
Yours, Paul Paul Gevers 於 2022/4/6 02:52 寫道:
Hi, On 04-04-2022 23:11, Ying-Chun Liu (PaulLiu) wrote:It is because your environment supports "neon" and ffmpeg will use that for acceleration.I wonder.But abel and qemu-user-static doesn't support neon. I think if you "cat /proc/cpuinfo" and neon will be in the Features.root@ci-worker-armel-01:~# cat /proc/cpuinfo | grep neon root@ci-worker-armel-01:~# Nope.Features : fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbsI now notice that the list of flags is also in the gdb output. If anything, it more looks like ffmpeg *thinks* it can use neon, but can't. Would that be a bug in ffmpeg?I'll see if I can use cpuflags in ffmpeg to disable neon on my test. So that it can pass.Ack, but I wonder if the bug needs to be cloned an reassigned to ffmpeg then, for detecting neon when not available.Paul
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