Set MP4 thumbnail

Set MP4 thumbnail

With AtomicParsley, you can set the thumbnail that will be displayed when you look at the file in a file explorer. Example commands
$ atomicparsley infile.mp4 --artwork infile.png

$ atomicparsley infile.mp4 -t
Atom "covr" contains: 1 piece of artwork
I notice that the artwork shows up as a stream with FFmpeg
ffmpeg version N-51639-g7775992 Copyright (c) 2000-2013 the FFmpeg developers
  built on Apr  5 2013 22:29:42 with gcc 4.8.0 (GCC)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'A Knight's Tale (2001).mp4':
  Duration: 02:12:08.96, start: 0.000000, bitrate: 2364 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
                             1280x544 [SAR 1:1 DAR 40:17], 2071 kb/s, 23.98 fps,
                             23.98 tbr, 24k tbn, 47.95 tbc
    Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp,
                             287 kb/s
    Stream #0:2: Video: png, rgb24, 1280x544 [SAR 1:1 DAR 40:17], 90k tbr,
                        90k tbn, 90k tbc
So, is it possible to mux in thumbnail artwork using FFmpeg?