./ffmpeg -i /d/TestVideos/ClosedCaption/Closedcaption_atsc_rollup.ts  -vcodec libx264 -x264opts "a53cc=1" /tmp/test.ts
ffmpeg version N-75518-g0f98fd3 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.8 (SUSE Linux)
  configuration: --enable-pic --enable-gpl --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree --enable-postproc --enable-version3 --enable-x11grab --enable-libvpx --enable-libass
  libavutil      55.  2.100 / 55.  2.100
  libavcodec     57.  3.100 / 57.  3.100
  libavformat    57.  2.100 / 57.  2.100
  libavdevice    57.  0.100 / 57.  0.100
  libavfilter     6.  8.100 /  6.  8.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.100 /  2.  0.100
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mpegts, from '/d/TestVideos/ClosedCaption/Closedcaption_atsc_rollup.ts':
  Duration: 00:00:08.19, start: 1.400000, bitrate: 2787 kb/s
  Program 1 
    Metadata:
      service_name    : Service01
      service_provider: FFmpeg
    Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv), 704x480 [SAR 10:11 DAR 4:3], Closed Captions, max. 10000 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x101](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
File '/tmp/test.ts' already exists. Overwrite ? [y/N] y
[libx264 @ 0x2b8a0c0] bad option 'a53cc': '1'
Output #0, mpegts, to '/tmp/test.ts':
    Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 10:11 DAR 0:0, 29.97 fps
    Metadata:
      encoder         : Lavc57.3.100 libx264
    Stream #0:1(eng): Audio: mp2, 0 channels, 128 kb/s
    Metadata:
      encoder         : Lavc57.3.100 mp2
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (ac3 (native) -> mp2 (native))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height