Hi,
> My old pcengines box died and I had a rpi4 around that I spun up to replace
> it with as my network router/play machine.
>
> The rpi4 is working fantastic except for one thing:
>
> I have a webcam that I'm capturing images using fswebcam and those scripts
> all work perfectly.
>
> I try to make a video of the captured images (timelapse) using ffmpeg, but
> any invocation of ffmpeg I try dumps a core. I have tried on different sets
> of image files so I don't think it's the data coming in.
>
> A super simple invocation:
> ffmpeg -y -pattern_type glob -i "image*.jpeg" all.mp4
>
> After 40-50 frames results in:
> Thread 2 received signal SIGSEGV, Segmentation fault.
> [Switching to thread 203094]
> 0x0000001527489808 in mbtree_propagate_list_neon () from
> /usr/local/lib/libx264.so.24.0
>
> 0x0000001527489808 in mbtree_propagate_list_neon () from
> /usr/local/lib/libx264.so.24.0
>
> (gdb) bt
> #0 0x0000001527489808 in mbtree_propagate_list_neon () from
> /usr/local/lib/libx264.so.24.0
> #1 0x000000152744fe98 in macroblock_tree_propagate () from
> /usr/local/lib/libx264.so.24.0
> #2 0x0000001527442994 in macroblock_tree () from
> /usr/local/lib/libx264.so.24.0
> #3 0x0000001527441d1c in x264_8_slicetype_analyse () from
> /usr/local/lib/libx264.so.24.0
> #4 0x0000001527488950 in lookahead_slicetype_decide () from
> /usr/local/lib/libx264.so.24.0
> #5 0x00000015274882dc in lookahead_thread () from
> /usr/local/lib/libx264.so.24.0
> #6 0x000000158550d3c0 in _rthread_start (v=<optimized out>) at
> /usr/src/lib/librthread/rthread.c:96
> #7 0x000000153b2cdbf4 in __tfork_thread () at
> /usr/src/lib/libc/arch/aarch64/sys/tfork_thread.S:44
>
> Is anyone successfully running ffmpeg on rpi4?
I can confirm that ffmpeg dumps core for me on RPI4 running current/arm64.
Even with just three jpegs, i.e. three frames,
ffmpeg -y -pattern_type glob -i "*.jpg" all.mp4
just sits there for ages and eventualy segfaults like this:
Script started on Wed Jan 4 16:12:12 2023
ffmpeg version 4.4.3 Copyright (c) 2000-2022 the FFmpeg developers
built with OpenBSD clang version 13.0.0
configuration: --enable-shared --arch=aarch64 --cc=cc --disable-debug
--disable-indev=jack --disable-outdev=sdl2 --enable-avresample
--enable-fontconfig --enable-frei0r --enable-gpl --enable-ladspa
--enable-libaom --enable-libass --enable-libdav1d --enable-libfreetype
--enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-libopus
--enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libx265 --enable-libxml2
--enable-libxvid --enable-libzimg --enable-nonfree --enable-openssl
--enable-libvidstab --extra-cflags='-I/usr/local/include -I/usr/X11R6/include'
--extra-libs='-L/usr/local/lib -L/usr/X11R6/lib' --extra-ldsoflags=
--mandir=/usr/local/man --objcc=/usr/bin/false --optflags='-O2 -pipe
-Wno-redundant-decls'
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Input #0, image2, from 'smc*.jpg':
Duration: 00:00:00.12, start: 0.000000, bitrate: N/A
Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown),
2560x1920, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
1;36m[libx264 @ 0x1491c75800] 0musing cpu capabilities: ARMv8 NEON
1;36m[libx264 @ 0x1491c75800] 0mprofile High, level 5.0, 4:2:0, 8-bit
1;36m[libx264 @ 0x1491c75800] 0m264 - core 164 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2022 - http://www.videolan.org/x264.html - options: cabac=1 ref=3
deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11
fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0
nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3
b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2
keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf
mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'all.mp4':
Metadata:
encoder : Lavf58.76.100
Stream #0:0: Video: h264 (avc1 / 0x31637661), yuvj420p(pc,
bt470bg/unknown/unknown, progressive), 2560x1920, q=2-31, 25 fps, 12800 tbn
Metadata:
encoder : Lavc58.134.100 libx264
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 1 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed=
frame= 3 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed=
Segmentation fault (core dumped)
Reading symbols from 32m/usr/local/bin/ffmpegm...
(No debugging symbols found in 32m/usr/local/bin/ffmpegm)
[New process 403534]
[New process 166640]
[New process 477908]
[New process 114936]
[New process 366281]
[New process 313181]
[New process 410521]
[New process 459975]
[New process 267908]
[New process 458273]
[New process 590791]
[New process 209987]
Core was generated by `ffmpeg'.
Program terminated with signal SIGSEGV, Segmentation fault.
m--Type <RET> for more, q to quit, c to continue without paging--
#0 34m0x000000141f3fa9ccm in 33mx264_8_cabac_encode_decision_asmm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
[Current thread is 1 (process 403534)]
(gdb)
(gdb) bt
#0 34m0x000000141f3fa9ccm in 33mx264_8_cabac_encode_decision_asmm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
#1 34m0x000000141f34e6e4m in 33mx264_8_macroblock_write_cabacm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
#2 34m0x000000141f36191cm in 33mslices_writem () from
32m/usr/local/lib/libx264.so.24.0m
#3 34m0x000000141f365cd4m in 33mthreadpool_threadm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
#4 34m0x00000014b104f134m in 33m_rthread_startm (36mvm=<optimized out>)m
m at 32m/usr/src/lib/librthread/rthread.cm:96
#5 34m0x00000013d6460450m in 33m__tfork_threadm ()m
m at 32m/usr/src/lib/libc/arch/aarch64/sys/tfork_thread.Sm:43
(gdb)
#0 34m0x000000141f3fa9ccm in 33mx264_8_cabac_encode_decision_asmm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
#1 34m0x000000141f34e6e4m in 33mx264_8_macroblock_write_cabacm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
#2 34m0x000000141f36191cm in 33mslices_writem () from
32m/usr/local/lib/libx264.so.24.0m
#3 34m0x000000141f365cd4m in 33mthreadpool_threadm ()m
m from 32m/usr/local/lib/libx264.so.24.0m
#4 34m0x00000014b104f134m in 33m_rthread_startm (36mvm=<optimized out>)m
m at 32m/usr/src/lib/librthread/rthread.cm:96
#5 34m0x00000013d6460450m in 33m__tfork_threadm ()m
m at 32m/usr/src/lib/libc/arch/aarch64/sys/tfork_thread.Sm:43
Jan
