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• aarch64 : vp8 : Fix assembling with clang

  31 janvier 2019, par Martin Storsjö

  aarch64 : vp8 : Fix assembling with clang
  This also partially fixes assembling with MS armasm64 (via
  
  gas-preprocessor).
  The movrel macro invocations need to pass the offset via a separate
  
  parameter. Mach-o and COFF relocations don't allow a negative
  
  offset to a symbol, which is handled properly if the offset is passed
  
  via the parameter. If no offset parameter is given, the macro
  
  evaluates to something like "adrp x17, subpel_filters-16+(0)", which
  
  older clang versions also fail to parse (the older clang versions
  
  only support one single offset term, although it can be a parenthesis.
  Signed-off-by : Martin Storsjö <martin@martin.st>
  
  (cherry picked from commit 26d7af4c381ee3c7b13b032b3817168b84b98ca6)
  

  • [DH] libavcodec/aarch64/vp8dsp_neon.S

• How do you set up carrierwave-video with ffmpeg ?

  24 septembre 2013, par Maleckai

  This has been doing my head in for the past 2 days, and I just cannot seem to get it working.

  I am building a simple Rails app with the sole purpose of uploading & processing images and videos. I'm working on Ubuntu Linux.

  Here's the relevant gems in my Gemfile :

  gem 'delayed_job_active_record'
  
  gem 'carrierwave'
  
  gem 'carrierwave-video'
  
  gem 'carrierwave_backgrounder'
  
  gem 'mini_magick'
  
  gem 'streamio-ffmpeg'

  At first I was having problems with ffmpeg complaining about certain arguments (I determined this by taking the command the rails app attempted to run when it was to convert a video, and running it manually outside rails), which I discovered was because the version of ffmpeg I was using was 'too new'. So I downgraded to 1.2.1, which is what streamio-ffmpeg says is the only version of ffmpeg they're tested against.

  After that, I could run the command manually, fine. But whenever I tried to convert through the app, I'd get the error :

  Failed to transcode with FFmpeg. Check ffmpeg install and verify video is not corrupt or cut short. Original error: nil is not a symbol

  I did a bit of Googling on the error, and only came up with one relevant result, but nothing in there has helped my situation.

  I'm at a total loss at this point, and am not sure where I can go from here. I assume many of people have tried this before, so I'm hoping someone can guide me on the exact steps they took to get carrierwave-video & ffmpeg working together.

• x86inc : Avoid creating unnecessary local labels

  18 janvier 2016, par Henrik Gramner

  x86inc : Avoid creating unnecessary local labels
  The REP_RET workaround is only needed on old AMD cpus, and the labels clutter
  
  up the symbol table and confuse debugging/profiling tools, so use EQU to
  
  create SHN_ABS symbols instead of creating local labels. Furthermore, skip
  
  the workaround completely in functions that definitely won’t run on such cpus.
  Note that EQU is just creating a local label when using nasm instead of yasm.
  
  This is probably a bug, but at least it doesn’t break anything.
  Signed-off-by : Anton Khirnov <anton@khirnov.net>
  

  • [DBH] libavutil/x86/x86inc.asm