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• ffmpeg syntax has changed

  8 mai 2014, par Budgierless

  Just like what was talked about in this post : FFmpeg cannot recognize a preset even though it does exsist Ubuntu 12.04

  I have help, with deblockalpha which has been depreciated from ffmpeg for along time,
  i am no good with all this coding business, but would like someone to tell me how i can fix this outdated syntax, as i am getting this error :

  Unrecognized option ’deblockalpha’
  Failed to set value ’0’ for option ’deblockalpha’

  please see code below and advise ?

  $ffmpeg -i $input -r 30 -vcodec libx264 -s 512x288 -aspect 16:9 -b 1550k -maxrate 1800k -bufsize 4M -bt 1600k -flags +loop -cmp +chroma -deblockalpha 0 -deblockbeta 0 -refs 1 -coder 0 -me_method full -me_range 16 -subq 5 -partitions +parti4x4+parti8x8+partp8x8 -g 250 -keyint_min 25 -level 30 -trellis 2 -sc_threshold 40 -i_qfactor 0.71 -acodec libfaac -ab 128k -ar 44100 -ac 2 $addpre $output";

  thanks

• Alternative to ffmpeg for iOS

  6 mai 2012, par resident_

  I've been trying to implement ffmpeg in my ios app several weeks. And now I can play several avi files, but other files like a flv, wma, mp4... play slow.

  I have spent much time with ffmpeg and opengl and I don't find solution.

  I'm looking other alternatives to play this files on ios device.

  Someone know other libraries, frameworks, ... that I can use to play this files. No matter if they have business licenses.

  Very thanks,

  Edited :

  Init Shader :

   shader = [[GLShader alloc] initWithFileName:@"render" attributes:[NSDictionary dictionaryWithObjectsAndKeys:
  
                                                                                               [NSNumber numberWithInt:0], @"position",
  
                                                                                               [NSNumber numberWithInt:1], @"texCoords", nil]
  
                                           uniforms:[NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt:0], @"sampler0",
  
                                                                                               [NSNumber numberWithInt:0], @"viewProjectionMatrix",nil]];

  render.fsv :

  uniform sampler2D sampler0;
  
  varying highp vec2 _texcoord;
  
  void main()
  
  { gl_FragColor = texture2D(sampler0, _texcoord);}

  render.vsf :

  attribute vec4 position;
  
  attribute vec2 texCoords;
  
  varying  vec4 colorVarying;
  
  varying vec2 _texcoord;
  
  uniform mat4 viewProjectionMatrix;
  
  
  
  void main()
  
  {   _texcoord = texCoords;   
  
  gl_Position = viewProjectionMatrix * position;}

  How I can implement your solution in this code ?

• Linux based mp3 to wmv converter

  30 octobre 2012, par algorithmicCoder

  Is there some software library that can i can interact with via command line (no GUI business) exist that can take an mp3 and output wmv or a similar format ?

  Can ffmpeg do this ?

  I found this product—> http://www.3herosoft.com/how-to-convert-mp3-to-wmv.html ...ideally i would want to find a library that was able to carry out the same basic functionality via command line.

  Thanks !