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• linking against SDL library on ubuntu

  18 novembre 2013, par ali129

  this is my first post
  I have this problem with SDL library and "ffmpeg's ffplay" and "dosbox" on ubuntu. Here is what happenning :
  I have installed SDL and code::blocks.
  I also wrote a simple sdl program that shows a picture and tried to compile it tree ways :

  1- On command prompt which compiled and works perfectly. ( i mean : gcc -o hellosdl hellosd.c -lsdlmain -lsdl)

  2- On code::blocks by choosing file->new->project->SDL project
  which compiled but gives an error regarding i can't initialize graphic

  and finally
  3- On code::blocks but this time i manually configured sdl. i mean i simply choosed a blanked c file.then added sdl linker options "-lsdlmain and -lsdl" in code::blocks linker settings. and this time the program workes perfectly.

  Now the problem i have with dosbox and ffmpeg. I tried to compile these programs by running ./configure and make and they compiled without any error. but when i try to run dosbox or ffplay they give me these errors :

  ffplay error :
  ffplay version 0.11.1.git Copyright (c) 2003-2012 the FFmpeg developers
  built on Oct 15 2013 04:34:36 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration :
  libavutil 51. 73.101 / 51. 73.101
  libavcodec 54. 56.100 / 54. 56.100
  libavformat 54. 27.101 / 54. 27.101
  libavdevice 54. 2.100 / 54. 2.100
  libavfilter 3. 16.104 / 3. 16.104
  libswscale 2. 1.101 / 2. 1.101
  libswresample 0. 15.100 / 0. 15.100
  Could not initialize SDL - No available video device
  (Did you set the DISPLAY variable ?)

  and yes my DISPLAY variable is set correctly

  echo $DISPLAY
  :0.0

  and

  dosbox error :

  ---

  Exit to error : Can't init SDL No available video device

  i also tried installing dosbox using sudo apt-get install dosbox and it works perfectly.

  i don't know why for some occasion my sdl library works and for some doesn't .
  it would be great if you could help me.

• ffmpeg on Heroku : unrecognized option 'preset'

  17 novembre 2013, par scientiffic

  I'm using ffmpeg version 1.2.4 in my local Rails app to convert video files. Everything works as expected when I run the app locally. When I deployed to heroku, I added a buildpack for ffmpeg :

  https://github.com/shunjikonishi/heroku-buildpack-ffmpeg

  This installs ffmpeg version git-2013-06-02-5711e4f. When I try to transcode a video to mp4, I get the following error :

  Unrecognized option 'preset'. Error splitting the argument list : Option not found

  Here is the complete log :

  2013-11-17T19:45:05.255059+00:00 app[web.1]: Running transcoding...
  
  2013-11-17T19:45:05.255059+00:00 app[web.1]: ffmpeg -y -i /app/public/uploads/tmp/1384717504-2-9158/Untitled.mov -vcodec libx264 -acodec libfaac -s 640x360  -qscale 0 -preset slow -g 30 -aspect 1.7777777777777777 /app/public/uploads/tmp/1384717504-2-9158/tmpfile.mp4
  
  2013-11-17T19:45:05.255059+00:00 app[web.1]: 
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]: Failed encoding...
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]: ffmpeg -y -i /app/public/uploads/tmp/1384717504-2-9158/Untitled.mov -vcodec libx264 -acodec libfaac -s 640x360  -qscale 0 -preset slow -g 30 -aspect 1.7777777777777777 /app/public/uploads/tmp/1384717504-2-9158/tmpfile.mp4
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]: 
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]: ffmpeg version git-2013-06-02-5711e4f Copyright (c) 2000-2013 the FFmpeg developers
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]:   built on Jun  2 2013 07:38:40 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]:   configuration: --enable-shared --disable-asm --prefix=/app/vendor/ffmpeg
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]:   libavutil      52. 34.100 / 52. 34.100
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]:   libavcodec     55. 13.100 / 55. 13.100
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]:   libavformat    55.  8.102 / 55.  8.102
  
  2013-11-17T19:45:05.317895+00:00 app[web.1]:   libavdevice    55.  2.100 / 55.  2.100
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]:   libavfilter     3. 74.101 /  3. 74.101
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]:   libswscale      2.  3.100 /  2.  3.100
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]:   libswresample   0. 17.102 /  0. 17.102
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]: Unrecognized option 'preset'.
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]: Error splitting the argument list: Option not found
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]: 
  
  2013-11-17T19:45:05.318137+00:00 app[web.1]: Errors: no output file created. 

  I think that the error may be a result of differences in the version of ffmpeg that I'm using locally and on Heroku. Does anyone have suggestions for how to resolve this issue ?

• Getting ffmpeg to work with Heroku

  23 octobre 2016, par scientiffic

  I attempted to install ffmpeg for my Heroku Rails app and now my app is crashing.

  I added a buildpack using the following command :

  heroku config:add BUILDPACK_URL=https://github.com/shunjikonishi/heroku-buildpack-ffmpeg

  After pushing to Heroku, I get the following error according to my logs :

  2013-11-17T17:50:44.022351+00:00 heroku[web.1]: Starting process with command `bundle exec rails server -p 47171`
  
  2013-11-17T17:50:46.295602+00:00 app[web.1]: bash: bundle: command not found
  
  2013-11-17T17:50:47.589491+00:00 heroku[web.1]: Process exited with status 127
  
  2013-11-17T17:50:47.597968+00:00 heroku[web.1]: State changed from starting to crashed
  
  2013-11-17T17:50:48.620853+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ (...) fwd="76.118.180.235" dyno= connect= service= status=503 bytes=
  
  2013-11-17T17:50:48.847288+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=(...) fwd="76.118.180.235" dyno= connect= service= status=503 bytes=

  When I run heroku run rake db:migrate, I get the error :

  Running `rake db:migrate` attached to terminal... up, run.9791
  
  (in /app)
  
  rake aborted!
  
  no such file to load -- bundler/setup
  
  rubygems/custom_require>:29:in `require'
  
  rubygems/custom_require>:29:in `require'
  
  /app/config/boot.rb:6:in `<top>'
  
  rubygems/custom_require>:29:in `require'
  
  rubygems/custom_require>:29:in `require'
  
  /app/config/application.rb:1:in `<top>'
  
  rubygems/custom_require>:29:in `require'
  
  rubygems/custom_require>:29:in `require'
  
  /app/Rakefile:5:in `<top>'
  
  /usr/local/lib/ruby/1.9.1/rake.rb:2373:in `load'
  
  /usr/local/lib/ruby/1.9.1/rake.rb:2373:in `raw_load_rakefile'
  
  /usr/local/lib/ruby/1.9.1/rake.rb:2007:in `block in load_rakefile'
  
  /usr/local/lib/ruby/1.9.1/rake.rb:2058:in `standard_exception_handling'
  
  /usr/local/lib/ruby/1.9.1/rake.rb:2006:in `load_rakefile'
  
  /usr/local/lib/ruby/1.9.1/rake.rb:1991:in `run'
  
  /usr/local/bin/rake:31:in `<main>'
  
  </main></top></top></top>

  When I check the version of bundler I’m using (bundle show bundler), I get :

  /Users/(...).rvm/gems/ruby-1.9.3-p448/gems/bundler-1.3.5/lib/bundler.rb:284: warning: Insecure world writable dir /usr/local in PATH, mode 040777
  
  /Users/(...)/.rvm/gems/ruby-1.9.3-p448/gems/bundler-1.3.5

  How can I solve this problem ?