freeswitch/conf/vanilla/autoload_configs/av.conf.xml

<configuration name="avcodec.conf" description="AVCodec Config">
  <settings>
    <!-- max bitrate the system support, truncate if over limit -->
    <!-- <param name="max-bitrate" value="5mb"/> -->

    <!-- <param name="rtp-slice-size" value="1200"/> -->

    <!-- minimum time to generate a new key frame in ms /> -->
    <!-- <param name="key-frame-min-freq" value="250"/> -->

    <!-- integer of cpus, or 'auto', or 'cpu/<divisor>/<max> -->
    <param name="dec-threads" value="1"/>
    <param name="enc-threads" value="cpu/2/4"/>
  </settings>

  <profiles>
    <profile name="H263">
    </profile>

    <profile name="H263+">
    </profile>

    <profile name="H264">
      <!-- <param name="dec-threads" value="1"/> -->
      <!-- <param name="enc-threads" value="cpu/2/4"/> -->

      <!-- <param name="profile" value="baseline"/> -->
      <!-- <param name="level" value="41"/> -->
      <!-- <param name="timebase" value="1/90"/> -->

<!--

#define AV_CODEC_FLAG_UNALIGNED       (1 <<  0)
#define AV_CODEC_FLAG_QSCALE          (1 <<  1)
#define AV_CODEC_FLAG_4MV             (1 <<  2)
#define AV_CODEC_FLAG_OUTPUT_CORRUPT  (1 <<  3)
#define AV_CODEC_FLAG_QPEL            (1 <<  4)
#define AV_CODEC_FLAG_PASS1           (1 <<  9)
#define AV_CODEC_FLAG_PASS2           (1 << 10)
#define AV_CODEC_FLAG_LOOP_FILTER     (1 << 11)
#define AV_CODEC_FLAG_GRAY            (1 << 13)
#define AV_CODEC_FLAG_PSNR            (1 << 15)
#define AV_CODEC_FLAG_TRUNCATED       (1 << 16)
#define AV_CODEC_FLAG_INTERLACED_DCT  (1 << 18)
#define AV_CODEC_FLAG_LOW_DELAY       (1 << 19)
#define AV_CODEC_FLAG_GLOBAL_HEADER   (1 << 22)
#define AV_CODEC_FLAG_BITEXACT        (1 << 23)
#define AV_CODEC_FLAG_AC_PRED         (1 << 24)
#define AV_CODEC_FLAG_INTERLACED_ME   (1 << 29)
#define AV_CODEC_FLAG_CLOSED_GOP      (1U << 31)

-->

      <param name="flags" value="LOOP_FILTER|PSNR"/>

<!--
#define FF_CMP_SAD          0
#define FF_CMP_SSE          1
#define FF_CMP_SATD         2
#define FF_CMP_DCT          3
#define FF_CMP_PSNR         4
#define FF_CMP_BIT          5
#define FF_CMP_RD           6
#define FF_CMP_ZERO         7
#define FF_CMP_VSAD         8
#define FF_CMP_VSSE         9
#define FF_CMP_NSSE         10
#define FF_CMP_W53          11
#define FF_CMP_W97          12
#define FF_CMP_DCTMAX       13
#define FF_CMP_DCT264       14
#define FF_CMP_MEDIAN_SAD   15
#define FF_CMP_CHROMA       256
-->

      <!-- <param name="me-cmp" value="1"/> -->
      <!-- <param name="me-range" value="16"/> -->
      <!-- <param name="max-b-frames" value="3"/> -->
      <!-- <param name="refs" value="3"/> -->
      <!-- <param name="gop-size" value="250"/> -->
      <!-- <param name="keyint-min" value="25"/> -->
      <!-- <param name="i-quant-factor" value="0.71"/> -->
      <!-- <param name="b-quant-factor" value="0.76923078"/> -->
      <!-- <param name="qcompress" value="0.6"/> -->
      <!-- <param name="qmin" value="10"/> -->
      <!-- <param name="qmax" value="51"/> -->
      <!-- <param name="max-qdiff" value="4"/> -->

<!--
enum AVColorSpace {
    AVCOL_SPC_RGB         = 0,  ///< order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB)
    AVCOL_SPC_BT709       = 1,  ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
    AVCOL_SPC_UNSPECIFIED = 2,
    AVCOL_SPC_RESERVED    = 3,
    AVCOL_SPC_FCC         = 4,  ///< FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
    AVCOL_SPC_BT470BG     = 5,  ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
    AVCOL_SPC_SMPTE170M   = 6,  ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC
    AVCOL_SPC_SMPTE240M   = 7,  ///< functionally identical to above
    AVCOL_SPC_YCGCO       = 8,  ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
    AVCOL_SPC_YCOCG       = AVCOL_SPC_YCGCO,
    AVCOL_SPC_BT2020_NCL  = 9,  ///< ITU-R BT2020 non-constant luminance system
    AVCOL_SPC_BT2020_CL   = 10, ///< ITU-R BT2020 constant luminance system
    AVCOL_SPC_SMPTE2085   = 11, ///< SMPTE 2085, Y'D'zD'x
    AVCOL_SPC_CHROMA_DERIVED_NCL = 12, ///< Chromaticity-derived non-constant luminance system
    AVCOL_SPC_CHROMA_DERIVED_CL = 13, ///< Chromaticity-derived constant luminance system
    AVCOL_SPC_ICTCP       = 14, ///< ITU-R BT.2100-0, ICtCp
    AVCOL_SPC_NB                ///< Not part of ABI
};
-->
      <param name="colorspace" value="0"/>

<!--
enum AVColorRange {
    AVCOL_RANGE_UNSPECIFIED = 0,
    AVCOL_RANGE_MPEG        = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
    AVCOL_RANGE_JPEG        = 2, ///< the normal     2^n-1   "JPEG" YUV ranges
    AVCOL_RANGE_NB               ///< Not part of ABI
};
-->
      <param name="color-range" value="2"/>

      <!-- x264 private options-->
      <options>
        <option name="preset" value="veryfast"/>
        <option name="intra_refresh" value="1"/>
        <option name="tune" value="animation+zerolatency"/>
        <option name="sc_threshold" value="40"/>
        <option name="b_strategy" value="1"/>
        <option name="crf" value="18"/>
      </options>
    </profile>

    <profile name="H265">
    </profile>

    <profile name="conference">
      <param name="dec-threads" value="1"/>
      <param name="enc-threads" value="cpu/2/4"/>

      <codecs>
        <!-- profiles will be parsed at runtime
          to overwrite this profile params if codec matches -->
        <codec name="H263" profile="H263"/>
        <codec name="H264" profile="H264"/>
        <codec name="H264" profile="conference-H264"/>
      </codecs>
    </profile>

    <profile name="conference-H264">
      <options>
        <option name="preset" value="veryfast"/>
        <option name="intra_refresh" value="1"/>
        <option name="tune" value="animation+zerolatency"/>
        <option name="sc_threshold" value="40"/>
        <option name="b_strategy" value="1"/>
        <option name="crf" value="10"/>
      </options>
    </profile>

  </profiles>
</configuration>

<configuration name="avformat.conf" description="AVFormat Config">
  <settings>
      <param name="colorspace" value="1"/>
  </settings>
</configuration>