Interlaced xdcam mov tags are not used

[Carl Eugen Hoyos]

​http://ffmpeg.org/pipermail/ffmpeg-user/2016-May/031988.html

$ ffmpeg -f lavfi -i testsrc=s=hd1080:r=50 -vf tinterlace=4 -flags +ildct+ilme -top 1 -vcodec mpeg2video -pix_fmt yuv422p -t 3 -tag:v xd5c out.mov
ffmpeg version N-79725-g80d14de Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl --enable-libwebp --enable-libvpx
  libavutil      55. 23.100 / 55. 23.100
  libavcodec     57. 38.100 / 57. 38.100
  libavformat    57. 35.100 / 57. 35.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 44.100 /  6. 44.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, lavfi, from 'testsrc=s=hd1080:r=50':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 50 tbn
[mov @ 0x295f7c0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
Output #0, mov, to 'out.mov':
  Metadata:
    encoder         : Lavf57.35.100
    Stream #0:0: Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 12800 tbn
    Metadata:
      encoder         : Lavc57.38.100 mpeg2video
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
Stream mapping:
  Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg2video (native))
Press [q] to stop, [?] for help
frame=   75 fps= 36 q=31.0 Lsize=     588kB time=00:00:02.92 bitrate=1649.5kbits/s speed=1.39x
video:587kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.182035%

$ ffmpeg -i out.mov
ffmpeg version N-79725-g80d14de Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.7 (SUSE Linux)
  configuration: --enable-gpl --enable-libwebp --enable-libvpx
  libavutil      55. 23.100 / 55. 23.100
  libavcodec     57. 38.100 / 57. 38.100
  libavformat    57. 35.100 / 57. 35.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 44.100 /  6. 44.100
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 512
    compatible_brands: qt
    encoder         : Lavf57.35.100
  Duration: 00:00:03.00, start: 0.000000, bitrate: 1605 kb/s
    Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5e / 0x65356478), yuv422p(tv), 1920x1080 [SAR 1:1 DAR 16:9], 1602 kb/s, 25 fps, 25 tbr, 12800 tbn (default)
    Metadata:
      handler_name    : DataHandler
      encoder         : Lavc57.38.100 mpeg2video
At least one output file must be specified

The tag is xd5e instead of xd5c because the mov muxer thinks the video is progressive although both content and encoding are interlaced.