gistfile1.txt

$ ffmpeg -i output.mp4 -i output.opus -c:a copy -c:v copy -strict -2 zing.mp4
ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
  built with Apple LLVM version 9.0.0 (clang-900.0.37)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fd037802e00] st: 0 edit list: 1 Missing key frame while searching for timestamp: 0
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
[h264 @ 0x7fd038010a00] non-existing PPS 0 referenced
[h264 @ 0x7fd038010a00] decode_slice_header error
[h264 @ 0x7fd038010a00] no frame!
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf56.40.101
  Duration: 00:00:05.20, start: 0.000000, bitrate: 65 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480, 62 kb/s, 27.68 fps, 30 tbr, 90k tbn, 180k tbc (default)
    Metadata:
      handler_name    : VideoHandler
Input #1, ogg, from 'output.opus':
  Duration: 00:00:03.82, start: -0.020000, bitrate: 26 kb/s
    Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp
[mp4 @ 0x7fd038800800] track 1: codec frame size is not set
Output #0, mp4, to 'zing.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480, q=2-31, 62 kb/s, 27.68 fps, 30 tbr, 90k tbn, 90k tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1: Audio: opus (Opus / 0x7375704F), 48000 Hz, stereo, fltp
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame=  135 fps=0.0 q=-1.0 Lsize=      54kB time=00:00:05.16 bitrate=  85.8kbits/s speed=1.27e+03x
video:37kB audio:12kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 10.136143%