[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 14:41
> To: FFmpeg user questions
> Subject: Re: [FFmpeg-user] deinterlacing with ntsc-dvd
> 
> On 05/22/2013 08:08 AM, Francois Visagie wrote:
> >> -----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.
> Thanks!  Where in the command line should I put this?  After `-target
ntsc-
> dvd`?

I normally do, to prevent my options being overridden by macro settings such
as -target.

> >
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