[FFmpeg-user] deinterlacing with ntsc-dvd

[Francois Visagie]

> -----Original Message-----
> From: ffmpeg-user-bounces at ffmpeg.org [mailto:ffmpeg-user-
> bounces at ffmpeg.org] On Behalf Of Matthew Morgan
> Sent: 22 May 2013 13:08
> To: ffmpeg
> Subject: [FFmpeg-user] deinterlacing with ntsc-dvd
> 
> 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.

PS. The options ' -flags ildct+ilme' _preserve_ interlacing. This is
accepted by the DVD standard and incurs least quality loss.

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