[FFmpeg-user] wmv3+wma2.mov: Failed to open codec / Unable to parse option value "(null)" as sample format

[ffmpeg at zoot.org]

Hi,

macosx-10.11.6, ffmpeg-3.2.4 (via macports)

I have a strange old video that i'd like to convert.
It's strange because it's a MOV file containing
WMA2 and WMV3. I can only play it using quicktime
on one old mac. It doesn't play on a recent mac
or on windows10.

The output of ffmpeg -codecs includes:

 DEA.L. aac                  AAC (Advanced Audio Coding) (decoders: aac aac_fixed aac_at libfdk_aac ) (encoders: aac aac_at libfdk_aac )
 DEV.LS h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_vda ) (encoders: libx264 libx264rgb h264_videotoolbox )
 DEA.L. wmav2                Windows Media Audio 2
 D.V.L. wmv3                 Windows Media Video 9

The output of ffmeg -formats includes:

  E mov             QuickTime / MOV
 D  mov,mp4,m4a,3gp,3g2,mj2 QuickTime / MOV
  E mp4             MP4 (MPEG-4 Part 14)

If I try to convert it to mp4/h264/aac with:

  ffmpeg -i in.mov -vcodec h264 -acodec aac out.mp4

I get:

  ffmpeg version 3.2.4 Copyright (c) 2000-2017 the FFmpeg developers
    built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
    configuration: --prefix=/opt/local --enable-swscale --enable-avfilter --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg --enable-libmodplug --enable-libvpx --enable-libsoxr --enable-libspeex --enable-libass --enable-libbluray --enable-lzma --enable-gnutls --enable-fontconfig --enable-libfreetype --enable-libfribidi --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --disable-indev=jack --disable-outdev=xv --enable-audiotoolbox --enable-sdl2 --mandir=/opt/local/share/man --enable-shared --enable-pthreads --cc=/usr/bin/clang --enable-vda --enable-videotoolbox --arch=x86_64 --enable-yasm --enable-libx265 --enable-gpl --enable-postproc --enable-libx264 --enable-libxvid --enable-nonfree --enable-libfdk-aac
    libavutil      55. 34.101 / 55. 34.101
    libavcodec     57. 64.101 / 57. 64.101
    libavformat    57. 56.101 / 57. 56.101
    libavdevice    57.  1.100 / 57.  1.100
    libavfilter     6. 65.100 /  6. 65.100
    libavresample   3.  1.  0 /  3.  1.  0
    libswscale      4.  2.100 /  4.  2.100
    libswresample   2.  3.100 /  2.  3.100
    libpostproc    54.  1.100 / 54.  1.100
  [wmav2 @ 0x7fdbeb01cc00] block_align is not set
  [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fdbeb001200] Failed to open codec in av_find_stream_info
  [wmav2 @ 0x7fdbeb01cc00] block_align is not set
  Guessed Channel Layout for Input Stream #0.0 : stereo
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'bj1.mov':
    Metadata:
      major_brand     : qt  
      minor_version   : 537199360
      compatible_brands: qt  
      creation_time   : 2013-11-23T00:52:27.000000Z
    Duration: 00:01:00.09, start: 0.000000, bitrate: 6315 kb/s
      Stream #0:0(eng): Audio: wmav2 (WMA2 / 0x32414D57), 44100 Hz, stereo, 141 kb/s (default)
      Metadata:
        creation_time   : 2013-11-23T00:52:27.000000Z
        handler_name    : Apple Alias Data Handler
      Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 6204 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 59.94 tbc (default)
      Metadata:
        creation_time   : 2013-11-23T00:52:27.000000Z
        handler_name    : Apple Alias Data Handler
  [abuffer @ 0x7fdbea5006c0] Unable to parse option value "(null)" as sample format
      Last message repeated 1 times
  [abuffer @ 0x7fdbea5006c0] Error setting option sample_fmt to value (null).
  [graph 1 input from stream 0:0 @ 0x7fdbea5007e0] Error applying options to the filter.
  Error opening filters!

Any idea what this is trying to tell me?
Is there something wrong with the file?
Or with the ffmpeg installation?
Or the command? Or something else?

Thanks.