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• Android gcc 4.6 crash on __check_for_sync8_kernelhelper - ARM - FFmpeg

  3 août 2013, par user2646692

  I'm compiling ffmpeg with gcc 4.6 (as this is default on ndk r9) for armv7-a devices and a weird crash occurs on certain devices that didn't happen when running code compiled with gcc 4.4.3.

  this is the backtrace :

  08-02 18:36:08.200: I/sec_anm_ahi_output(1535): setParameters(stop_output_streamtype=1)
  
  08-02 18:36:08.360: I/DEBUG(18804):          #00  pc 000162a0  /system/lib/libc.so (__libc_android_abort)
  
  08-02 18:36:08.360: I/DEBUG(18804):          #01  pc 00418334  /data/data/com.ffmpeg.android/lib/libffmpeg.so (__check_for_sync8_kernelhelper)
  
  08-02 18:36:08.360: I/DEBUG(18804): libc base address: afd00000

  After searching on google, it seems the problem is in 64-bit atomic as it seems my compiled code it's not using dmb instructions instead it's calling kernelhelper :

  https://code.google.com/p/android/issues/detail?id=41297

  http://www.ogre3d.org/forums/viewtopic.php?f=21&t=78199

  The workaround it's to compile for armv7-a, but I'm already doing this with the same results. These are the flags I'm using :

  CPU=armv7-a
  
  OPTIMIZE_CFLAGS="-march=$CPU -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -mthumb -D__thumb__"
  
  EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -march=armv7-a"
  
  PREFIX=./android/$CPU 
  
  EXTRA_CONFIGURE=""

  I have also tried with these, but with same results :

  CPU=armv7-a
  
  OPTIMIZE_CFLAGS="-march=$CPU -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp -mthumb -D__thumb__"
  
  EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -march=armv7-a"
  
  PREFIX=./android/$CPU 
  
  EXTRA_CONFIGURE="--disable-armv5te --disable-armv6 --disable-armv6t2"

  I have tested on different devices and these are the results :

  Nexus 4 - No Crash

  Nexus 7 - No crash

  Galaxy sII - Crash

  Galaxy Ace 2 - Crash

  I would appreciate any help.

  Thanks.

• Evolution #4149 (Nouveau) : UI System Fonts pour l’espace privé

  10 juin 2018, par Peet du

  Un article qui peut donner des idées : https://www.smashingmagazine.com/2015/11/using-system-ui-fonts-practical-guide/

  (Note : Ouverture de ce ticket suite à la suggestion de https://core.spip.net/issues/4148#note-14)

• How to assign variable to different extension of files in same directory in bash

  3 mai 2021, par Yacer Azeem

  I have a task to :

  


  

  1. Watch a folder for video files (mp4,mov,mkv etc.)

  


  2. Transform the video files to HLS (480p, 720p, 1080p) using ffmpeg

  


  3. Move these files to a different folder

  


  4. Delete the original files from the watch folder

  


  5. Send an email stating that the following video file was transcoded

  


  


  I want to deal with every .mp4 .mov and .mkv as a variable in bash so that I can perform the above-mentioned tasks.
The folder containing these files are in

  


  /mnt/volume1/videos


  


  directory architecture

  


  /mnt/volum1/videos/sample.mp4
/mnt/volum1/videos/sample.mov
/mnt/volum1/videos/sample.mkv