title: Which flag to use for better quality with sws_scale?
body: <pre><code>/* values for the flags, the stuff on the command line is different */
  #define SWS_FAST_BILINEAR     1
  #define SWS_BILINEAR          2
  #define SWS_BICUBIC           4
  #define SWS_X                 8
  #define SWS_POINT          0x10
  #define SWS_AREA           0x20
  #define SWS_BICUBLIN       0x40
  #define SWS_GAUSS          0x80
  #define SWS_SINC          0x100
  #define SWS_LANCZOS       0x200
  #define SWS_SPLINE        0x400
  </code></pre>
  
  <p>Which one is better for image quality? What are differences? Are they all lossy?
  I'm trying to convert RGB24 into YUV420P.</p>