raspberry crach

[yves2]

i tried to open a h264 video with raspbian on à rpi3
xjadeo crash after indexing at the beginning of reading
is there some way to use xjadeo on raspberry ?

[x42]

In principles yes, although a RPi may not be powerful enough for smooth operation. As for the crash at hand a backtrace would be useful to understand what causes the crash.

[kaliste]

Hi folks.

I have the same problem on my Raspberry 3 with Jack audio opened (or not, it is the same issue)
When i launch a file on xjadeo it crashes with the message "bus issue" (in french "erreur de bus"). Open GL seems not to be sync as you can see below :

Thx for your help.

xjadeo -d /home/pi/Desktop/medias
enabled drag-DROP support.
openGL VBlank not synced
selected MIDI driver: JACK-MIDI
using JACK-transport as sync source.
selected MIDI driver: PORTMIDI
Midi Input opened.
frame rate: 30
duration in seconds: 80.5
total frames: 2415
file start offset: 0 video-frames
image size: 1280x720 px
display size: 1280x720 px
PTS: Best effort.
Erreur du bus

[x42]

Can you get a backtrace?

I don't know if raspian offers an easy way to do that. The standard way would be to compile xjadeo (or get a built with debug-symbols), then run it inside a debugger: gdb --args xjadeo -J /path/to/video.mp4 and when it crashes thread apply all bt.

[x42]

PS. "bus error" could indicate that it's a memory alignment issue or that the binary was compiled with optimizations not suitable for the target system. but that's just a guess. a backtrace would tell for sure

[kaliste]

Sorry it is too complicated for my skill.
I will try another way to soluce my problem.

Thx for your help.

[danielblues]

It's a "memory alignment issue".

The xjadeo master did not compile with the distro libs, so I've compiled it with ffmpeg git master and still got this:

dmesg

[16269.180718] Alignment trap: xjadeo (3041) PC=0x00a7a1c0 Instr=0xf402602d Address=0x6bfd3008 FSR 0x801
[16269.180732] Alignment trap: not handling instruction f402602d at [<00a7a1c0>]
[16269.180737] 8<--- cut here ---
[16269.180749] Unhandled fault: alignment exception (0x801) at 0x6bfd3008
[16269.180763] pgd = 57561fcb
[16269.180772] [6bfd3008] *pgd=0301b835, *pte=060b775f, *ppte=060b7c7f

Running "thread apply all bt", got this

(gdb) run
Starting program: /home/pi/Documents/Xjadeo/xjadeo/src/xjadeo/xjadeo -J /home/pi/Videos/PinkFloyd-ComfortablyNumb.mkv
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
no TTF font found. OSD will not be available until you set one.
enabled drop-frame-timecode (use -n to override).
frame rate: 29.97
duration in seconds: 465.131
total frames: 13939
file start offset: 0 video-frames
image size: 720x480 px
display size: 720x480 px
[New Thread 0x764bb440 (LWP 771)]
PTS: Best effort.
[Thread 0x764bb440 (LWP 771) exited]
[New Thread 0x707ff440 (LWP 772)]
[New Thread 0x6fffe440 (LWP 773)]
[New Thread 0x6f5ff440 (LWP 774)]
[New Thread 0x6edfe440 (LWP 775)]
[New Thread 0x6e3ff440 (LWP 776)]
[New Thread 0x6d9ff440 (LWP 777)]
[New Thread 0x6cfff440 (LWP 778)]
[New Thread 0x6c5ff440 (LWP 781)]
enabled drag-DROP support.
openGL VBlank not synced
selected MIDI driver: JACK-MIDI
Warning: There is no Initial sync-source, and no remote-control enbled to
change the sync source. Do not use '-J' option (unless you're testing).

Thread 1 "xjadeo" received signal SIGBUS, Bus error.
0x00a7a1c4 in ff_yuv420p_to_bgra_neon () at libswscale/arm/yuv2rgb_neon.S:279
279 declare_rgb_funcs yuv420p
(gdb) thread apply all bt

Thread 10 (Thread 0x6c5ff440 (LWP 781)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d2f10)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d2ee8)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d2ee8, mutex=0x0) at pthread_cond_wait.c:655
Backtrace stopped: Cannot access memory at address 0x66f7f6f8
Thread 9 (Thread 0x6cfff440 (LWP 778)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d2f10)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d2ee8)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d2ee8, mutex=0x0) at pthread_cond_wait.c:655
Backtrace stopped: Cannot access memory at address 0x66f7f6f8
Thread 8 (Thread 0x6d9ff440 (LWP 777)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d2f10)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
--Type for more, q to quit, c to continue without paging--
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d2ee8)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d2ee8, mutex=0x0) at pthread_cond_wait.c:655
Backtrace stopped: Cannot access memory at address 0x66f7f6f8
Thread 7 (Thread 0x6e3ff440 (LWP 776)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d2f10)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d2ee8)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d2ee8, mutex=0x0) at pthread_cond_wait.c:655
Backtrace stopped: Cannot access memory at address 0x66f7f6f8
Thread 6 (Thread 0x6edfe440 (LWP 775)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d1f58)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d1f30)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d1f30, mutex=0x0) at pthread_cond_wait.c:655
#3 0x749142e8 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
--Type for more, q to quit, c to continue without paging--
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
Thread 5 (Thread 0x6f5ff440 (LWP 774)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d1e50)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d1e28)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d1e28, mutex=0x0) at pthread_cond_wait.c:655
#3 0x749142e8 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
Thread 4 (Thread 0x6fffe440 (LWP 773)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d1d48)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d1d20)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d1d20, mutex=0x0) at pthread_cond_wait.c:655
#3 0x749142e8 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
--Type for more, q to quit, c to continue without paging--
Thread 3 (Thread 0x707ff440 (LWP 772)):
#0 futex_wait_cancelable (private=0, expected=0, futex_word=0x17d1c40)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x0, cond=0x17d1c18)
at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x17d1c18, mutex=0x0) at pthread_cond_wait.c:655
#3 0x749142e8 in ?? () from /usr/lib/arm-linux-gnueabihf/dri/swrast_dri.so
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
Thread 1 (Thread 0x76ff3a20 (LWP 768)):
#0 0x00a7a1c4 in ff_yuv420p_to_bgra_neon ()
at libswscale/arm/yuv2rgb_neon.S:279
#1 0x00000000 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb)

Looks like an ffmpeg issue, but I don't have much experience with this, can you give a help? (thank you (and for the usefull software))

Thread 1 "xjadeo" received signal SIGBUS, Bus error.
0x00a7a1c4 in ff_yuv420p_to_bgra_neon () at libswscale/arm/yuv2rgb_neon.S:279

[danielblues]

Compiling ffmpeg with --disable-neon fixed the issue.

./configure --extra-ldflags="-latomic" --arch=armel --target-os=linux --enable-gpl --enable-omx --enable-omx-rpi --enable-nonfree --disable-neon

libswscale/arm/yuv2rgb_neon.S is assembler code... brrr.

-latomic was also missing when linking xjadeo