View source for ffmpeg video encoding for the CFD-105 car video entertainment system

==command line==

This was successful and tested with great quality results.

 $ '''ffmpeg -i inputfile.mp4 -qscale:v 1 -c:v mpeg4 -vtag xvid -vf scale=640x360 output.avi'''

==configuration options==

high quality setting (from 1 to 31, where 1 is highest).  setting to 1 greatly increases file size.  quality 5 is about the same size and still very good.  too low a quality will cause the video to be very poor and "grainy"
 -qscale:v 5 

supported resolution
 -vf scale=640x360

Videos would not play without the vtag setting.

==source file info==

 $ '''ffprobe -i ./inputfile.mp4'''
 ffprobe version 2.8.8 Copyright (c) 2007-2016 the FFmpeg developers
 ...output trimmed...
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './inputfile.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2016-08-12 08:18:22
  Duration: 00:01:42.45, start: 0.000000, bitrate: 916 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 787 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2016-08-12 08:18:22
      handler_name    : ISO Media file produced by Google Inc.
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      creation_time   : 2016-08-12 08:18:22
      handler_name    : ISO Media file produced by Google Inc.
===output file info===
 $ ffprobe -i ./bob_the_train-numbers_song.avi 
 ffprobe version 2.8.8 Copyright (c) 2007-2016 the FFmpeg developers
 ...output trimmed...
 Input #0, avi, from './bob_the_train-numbers_song.avi':
  Metadata:
    encoder         : Lavf56.40.101
  Duration: 00:01:42.48, start: 0.000000, bitrate: 1696 kb/s
    Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 1556 kb/s, 25 fps, 25 tbr, 25 tbn, 25 tbc
    Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16p, 128 kb/s