[FFmpeg-user] deinterlacing with ntsc-dvd

[Matthew Morgan]

I'm having trouble with some material I'm converting to DVD with ffmpeg; there is significant ghosting on some players, and some google searches have pointed out that this is often related to interlacing.

The source materialis interlaced, top-field dominant, but when I run it throughffmpeg using "-target ntsc-dvd", mediainfo shows the output as being progressive.

Here is my ffmpeg command line:

ffmpeg -i dora_fairytale_cut.mpg -pass 1 -target ntsc-dvd -b:v 4000K /dev/null && ffmpeg -i dora_fairytale_cut.mpg -pass 2 -target ntsc-dvd -b:v 4000K dora_fairytale_cut_compressed.mpg
ffmpeg version N-53018-ge70e258 Copyright (c) 2000-2013 the FFmpeg developers
  built on May 13 2013 07:50:37 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
  configuration: --prefix=/opt/mmedia --enable-libxvid --enable-gpl --enable-libtheora --enable-libmp3lame --enable-libfaac --enable-nonfree --enable-libv4l2 --enable-x11grab --enable-libvpx
  libavutil      52. 30.100 / 52. 30.100
  libavcodec     55.  9.100 / 55.  9.100
  libavformat    55.  7.100 / 55.  7.100
  libavdevice    55.  0.100 / 55.  0.100
  libavfilter     3. 65.100 /  3. 65.100
  libswscale      2.  3.100 /  2.  3.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  3.100 / 52.  3.100
[mpeg @ 0xa43ae00] max_analyze_duration 5000000 reached at 5024000 microseconds
[NULL @ 0xa43b780] start time is not set in estimate_timings_from_pts
Input #0, mpeg, from 'dora_fairytale_cut.mpg':
  Duration: 00:46:56.26, start: 0.500000, bitrate: 6569 kb/s
    Stream #0:0[0x1bf]: Data: dvd_nav_packet
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/s
    Stream #0:2[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
File '/dev/null' already exists. Overwrite ? [y/N] y
Output #0, dvd, to '/dev/null':
  Metadata:
    encoder         : Lavf55.7.100
    Stream #0:0: Video: mpeg2video, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=2-31, pass 1, 4000 kb/s, 90k tbn, 29.97 tbc
    Stream #0:1: Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/s
Stream mapping:
  Stream #0:2 -> #0:0 (mpeg2video -> mpeg2video)
  Stream #0:1 -> #0:1 (ac3 -> ac3)
Press [q] to stop, [?] for help
frame=84404 fps=107 q=3.4 Lsize= 1562918kB time=00:46:56.28 bitrate=4546.2kbits/s dup=8 drop=0   
video:1375112kB audio:154016kB subtitle:0 global headers:0kB muxing overhead 2.209759%

My question is, should I be specifying any kind of options to make the deinterlacing happen correctly?  Is this even likely to be my problem?  If you need it, I can also post mediainfo output for the source and output files.