ffmpeg mp3 needs pushal

[VincentCCandela]

When running

ffmpeg -i "$
f" -codec:v copy -codec:a libmp3lame -q:a 2 "${f%.webm}.mp3"

I get:

ffmpeg version 4.0.2 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 8.2.0 (Alpine 8.2.0)
configuration: --prefix=/usr --enable-avresample --enable-avfilter --enable-gnutls
--enable-gpl --enable-libass --enable-libmp3lame --enable-libvorbis --enable-libvpx
--enable-libxvid --enable-libx264 --enable-libx265 --enable-libtheora --enable-libv
4l2 --enable-postproc --enable-pic --enable-pthreads --enable-shared --enable-libxcb
--disable-stripping --disable-static --disable-librtmp --enable-vaapi --enable-vdpa
u --enable-libopus --disable-asm --disable-debug
libavutil 56. 14.100 / 56. 14.100
libavcodec 58. 18.100 / 58. 18.100
libavformat 58. 12.100 / 58. 12.100
libavdevice 58. 3.100 / 58. 3.100
libavfilter 7. 16.100 / 7. 16.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 1.100 / 5. 1.100
libswresample 3. 1.100 / 3. 1.100
libpostproc 55. 1.100 / 55. 1.100
Input #0, matroska,webm, from 'lit.webm':
Metadata:
encoder : google/video-file
Duration: 00:03:13.59, start: 0.000000, bitrate: 149 kb/s
Stream #0:0(eng): Audio: vorbis, 44100 Hz, stereo, fltp (default)
File 'lit.mp3' already exists. Overwrite ? [y/N] y
Stream mapping:
Stream #0:0 -> #0:0 (vorbis (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
/root/.local/bin/music_converter: line 6: 15 Illegal instruction ffmpeg -i "$
f" -codec:v copy -codec:a libmp3lame -q:a 2 "${f%.webm}.mp3"

Dmesg returns:

unknown ioctl 5600
unknown ioctl 5422
unknown ioctl 5429
unknown ioctl 5409
unknown ioctl 5422
unknown ioctl 5429
unknown ioctl 5429
unknown ioctl 5409
unknown ioctl 5409
unknown ioctl 5422
unknown ioctl 5429
unknown ioctl 5409
unknown ioctl 5422
unknown ioctl 5429
unknown ioctl 5422
unknown ioctl 5429
unknown ioctl 5409
unknown ioctl 5409
unknown ioctl 5413
15 illegal instruction at 0xf5ef7a8b: 60 e8 9f ff ff ff 74 22

[tbodt]

pushal

[obisims]

Can reproduce, iPhone 7 (NN8X2ZP/A), 12.3.1

""
unknown ioctl 5413                                
23 illegal instruction at 0xf59f203b: 60 e8 9f ff ff ff 74 22