Encoder flac [FLAC (Free Lossless Audio Codec)]:
    Supported sample formats: s16 s32
FLAC encoder AVOptions:
-lpc_coeff_precision <int>        E...A. LPC coefficient precision (from 0 to 15)
-lpc_type          <int>        E...A. LPC algorithm (from -1 to 3)
   none                         E...A.
   fixed                        E...A.
   levinson                     E...A.
   cholesky                     E...A.
-lpc_passes        <int>        E...A. Number of passes to use for Cholesky factorization during LPC analysis (from 1 to INT_MAX)
-min_partition_order <int>        E...A. (from -1 to 8)
-max_partition_order <int>        E...A. (from -1 to 8)
-prediction_order_method <int>        E...A. Search method for selecting prediction order (from -1 to 5)
   estimation                   E...A.
   2level                       E...A.
   4level                       E...A.
   8level                       E...A.
   search                       E...A.
   log                          E...A.
-ch_mode           <int>        E...A. Stereo decorrelation mode (from -1 to 3)
   auto                         E...A.
   indep                        E...A.
   left_side                    E...A.
   right_side                   E...A.
   mid_side                     E...A.

