#=====================Cmdline:=====================
ffmpeg -re -localaddr 192.168.0.99 -i udp://239.20.23.49:50000 \
-max_muxing_queue_size 512 -crf 28 \
-profile:v baseline -level 3.0 \
-c:v libx264 -c:a libfdk_aac \
-preset:v veryfast \
-maxrate 400k -bufsize 800k \
-pix_fmt yuv420p -flags -global_header \
-hls_time 10 -hls_list_size 6 -hls_flags delete_segments \
-hls_start_number_source datetime /tmp/xd/chunklist.m3u8



#=====================ffmpeg output:=====================
ffmpeg version N-85461-gcd8e627 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-11)
  configuration: --prefix=/root/ffmpeg_build --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags='-L/root/ffmpeg_build/lib -ldl' --bindir=/root/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265
  libavutil      55. 61.100 / 55. 61.100
  libavcodec     57. 92.100 / 57. 92.100
  libavformat    57. 72.100 / 57. 72.100
  libavdevice    57.  7.100 / 57.  7.100
  libavfilter     6. 84.101 /  6. 84.101
  libswscale      4.  7.100 /  4.  7.100
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100
Input #0, mpegts, from 'udp://239.20.23.49:50000':
  Duration: N/A, start: 91864.795400, bitrate: 192 kb/s
  Program 63
    Metadata:
      service_name    : SERVICE
      service_provider: PROVIDER
    Stream #0:0[0x51]: Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz, stereo, fltp, 192 kb/s
    Stream #0:1[0xcbf]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, fcc/bt470bg/bt470bg, progressive), 704x480 [SAR 1:1 DAR 22:15], 29.97 tbr, 90k tbn, 59.94 tbc
Stream mapping:
  Stream #0:1 -> #0:0 (mpeg2video (native) -> h264 (libx264))
  Stream #0:0 -> #0:1 (ac3 (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
[libx264 @ 0x2dd9cc0] using SAR=1/1time=-577014:32:22.77 bitrate=N/A speed=N/A
[libx264 @ 0x2dd9cc0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x2dd9cc0] profile Constrained Baseline, level 3.0
Output #0, hls, to '/tmp/xd/chunklist.m3u8':
  Metadata:
    encoder         : Lavf57.72.100
    Stream #0:0: Video: h264 (libx264), yuv420p, 704x480 [SAR 1:1 DAR 22:15], q=-1--1, 29.97 fps, 90k tbn, 29.97 tbc
    Metadata:
      encoder         : Lavc57.92.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 400000/0/0 buffer size: 800000 vbv_delay: -1
    Stream #0:1: Audio: aac (libfdk_aac), 48000 Hz, stereo, s16, 139 kb/s
    Metadata:
      encoder         : Lavc57.92.100 libfdk_aac