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• android : libffmpeg-neon library loading : Fatal signal 11

  24 septembre 2014, par 4ntoine

  I’m working on android app that uses ffmpeg. I’ve cross-compiled ffmpeg and it’s working good on most devices. But on some Samsung devices i’m having Fatal signal 11 while loading libffmpeg-neon.so file.

  I’ve recompiled ffmpeg with debug symbols (--disable-stripping --enable-debug=3 and cflags += -gstabs+) and have stack trace :

  09-24 12:30:48.564 505-564/? D/CrashAnrDetector﹕ Build: samsung/espresso10rfxx/espresso10rf:4.2.2/JDQ39/P5100XXDMJ2:user/release-keys
  
  Hardware: piranha
  
  Revision: 9
  
  Bootloader: unknown
  
  Radio: unknown
  
  Kernel: Linux version 3.0.31-1919150 (se.infra@SEP-107) (gcc version 4.4.1 (Sourcery G++ Lite 2010q1-202) ) #1 SMP PREEMPT Fri Oct 18 15:31:19 KST 2013
  
  *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
  
  Build fingerprint: 'samsung/espresso10rfxx/espresso10rf:4.2.2/JDQ39/P5100XXDMJ2:user/release-keys'
  
  Revision: '9'
  
  pid: 5902, tid: 5902, name: om.company.project >>> com.company.project <<<
  
  signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad
  
  r0 00000027 r1 deadbaad r2 401d5258 r3 00000000
  
  r4 00000000 r5 beffb36c r6 00000004 r7 41217400
  
  r8 00000000 r9 409d21b0 sl 4005cb58 fp 00000001
  
  ip 5f6b5468 sp beffb368 lr 401a854d pc 401a4be2 cpsr 60000030
  
  d0 65706d666662696c d1 732e6e6f656e2d67
  
  d2 732e30323763692e d3 2f312d6c6f6f6863
  
  d4 0000000000000000 d5 3f80000000000000
  
  d6 3f80000000000000 d7 3f8000003f800000
  
  d8 0000000000000000 d9 0000000000000000
  
  d10 0000000000000000 d11 0000000000000000
  
  d12 0000000000000000 d13 0000000000000000
  
  d14 0000000000000000 d15 0000000000000000
  
  d16 0000000800000007 d17 003926e90036320b
  
  d18 003f10a5003c1bc7 d19 0044fa6100420583
  
  d20 006e401c00628019 d21 0085c022007a001f
  
  d22 0707070703030303 d23 0000002e0000002b
  
  d24 009d80280091c025 d25 00b5402e00a9402b
  
  d26 0000002700000024 d27 0000002d0000002a
  
  d28 006e400000628000 d29 0085c000007a0000
  
  d30 0000000100000001 d31 0000000100000001
  
  scr 60000090
  
  backtrace:
  
  #00 pc 0001abe2 /system/lib/libc.so
  
  #01 pc 00018208 /system/lib/libc.so (abort+4)
  
  #02 pc 008b076c /data/app-lib/com.company.project-1/libffmpeg-neon.so (__check_for_sync8_kernelhelper+68)
  
  #03 pc 000032b3 /system/bin/linker
  
  #04 pc 0000510b /system/bin/linker
  
  #05 pc 0004f973 /system/lib/libdvm.so (dvmLoadNativeCode(char const*, Object*, char**)+186)
  
  #06 pc 0006681d /system/lib/libdvm.so
  
  #07 pc 000276e0 /system/lib/libdvm.so
  
  #08 pc 0002b5c4 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)
  
  #09 pc 0005fc79 /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+272)
  
  #10 pc 0005fca3 /system/lib/libdvm.so (dvmCallMethod(Thread*, Method const*, Object*, JValue*, ...)+20)
  
  #11 pc 0006ad49 /system/lib/libdvm.so (dvmInitClass+1036)
  
  #12 pc 000225dc /system/lib/libdvm.so (dvmAsmSisterStart+412)
  
  #13 pc 0002b5c4 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)
  
  #14 pc 0005ff4f /system/lib/libdvm.so (dvmInvokeMethod(Object*, Method const*, ArrayObject*, ArrayObject*, ClassObject*, bool)+374)
  
  #15 pc 00067879 /system/lib/libdvm.so
  
  #16 pc 000276e0 /system/lib/libdvm.so
  
  #17 pc 0002b5c4 /system/lib/libdvm.so (dvmInterpret(Thread*, Method const*, JValue*)+184)
  
  #18 pc 0005fc79 /system/lib/libdvm.so (dvmCallMethodV(Thread*, Method const*, Object*, bool, JValue*, std::__va_list)+272)
  
  #19 pc 00049a43 /system/lib/libdvm.so
  
  #20 pc 00047f43 /system/lib/libandroid_runtime.so
  
  #21 pc 000492df /system/lib/libandroid_runtime.so (android::AndroidRuntime::start(char const*, char const*)+390)
  
  #22 pc 00000db7 /system/bin/app_process
  
  #23 pc 0001287f /system/lib/libc.so (__libc_init+38)
  
  #24 pc 00000ae8 /system/bin/app_process
  
  stack:
  
  beffb328 400eea98
  
  beffb32c 400ede0c
  
  beffb330 400ebcf8 /system/bin/linker
  
  beffb334 400ebf40 /system/bin/linker
  
  beffb338 400ec4f4
  
  beffb33c 400eb0ac /system/bin/linker
  
  beffb340 401d2254 /system/lib/libc.so
  
  beffb344 401d21b4 /system/lib/libc.so
  
  beffb348 00000000
  
  beffb34c 401a854d /system/lib/libc.so (_fwalk+32)
  
  beffb350 00000001
  
  beffb354 beffb36c [stack]
  
  beffb358 00000004
  
  beffb35c 41217400 [heap]
  
  09-24 12:30:48.564 505-564/? D/CrashAnrDetector﹕ processName:com.company.project

  The problem is that i can’t find check_for_sync or kernelhelper in ffmpeg sources so i can’t figure out what’s wrong. Any thoughts ?

  PS. I’ve tried readelf -Ws libffmpeg-neon.so | grep 8b076c and nothing.

• Lossless stream of MJPEG over HTTP using several JPEG files

  11 juin 2018, par sorush-r

  I have n jpeg files which I need to stream them over HTTP to get a reasonable benchmark test on my Optical Flow algorithm. The stream must be 30fps with each images shown for exactly 1 second. So I need image number 1 to be streamed 30 times (frames ?), and so on. Would it be easier to first make a video of these jpeg files then stream that video using VLC or something ?

  An important requirement is that the frames fetched from the stream must be exactly same as the jpeg files.

  Any solution using scripting languages (python maybe) or encoding decoding tools like ffmpeg or vlc is welcome.

• avfilter/delogo : Check that logo area is inside the picture

  10 mai 2016, par Jean Delvare

  avfilter/delogo : Check that logo area is inside the picture
  We can only remove the logo if it is inside the picture. We need at
  
  least one pixel around the logo area for interpolation.
  Fixes ticket #5527 (Delogo crash with x=0 and/or y=0).
  Signed-off-by : Jean Delvare <jdelvare@suse.com>
  
  Reviewed-by : Paul B Mahol <onemda@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavfilter/vf_delogo.c