[MEncoder-users] NTSC DVD ripping - inverse telecine artifacts

[Justin Randall]

Ok the best way to convert NTSC pure interlaced 30 fps to progressive
is to double the frame rate to 60 fps.  Otherwise you loose a lot of
information.  I would suggest trying something like this.  Be careful
of frame order in the source.  MPEG2 can be bootom frame first or top
frame first.  (Disclaimer: Depending on your CPU, this will take a
LONG time to process, but that is the price for converting interlaced
content properly).  The reason I only do one pass using constant
quantizer for the encode is because the de-interlacing takes so long.
Good luck and again let me know how it comes out.
-Justin

For top frame first (TFF) MPEG2 content:
>> mencoder dvd://1 -nosound -vf
yadif=3:1,mcdeint=2:1:10,scale=640:480 -sws 9 -ofps 60000/1001 -ovc
x264 -x264encopts
threads=auto:qp=17:qpmax=28:subq=6:partitions=all:8x8dct:me=umh:subme=6:frameref=5:bframes=3:b_pyramid:b_rdo:weight_b:keyint=250
-o Output.avi

For bottom frame first (BFF) MPEG2 content (notice the 0's for the
second options of yadif and mcdeint):
>> mencoder dvd://1 -nosound -vf
yadif=3:0,mcdeint=2:0:10,scale=640:480 -sws 9 -ofps 60000/1001 -ovc
x264 -x264encopts
threads=auto:qp=17:qpmax=28:subq=6:partitions=all:8x8dct:me=umh:subme=6:frameref=5:bframes=3:b_pyramid:b_rdo:weight_b:keyint=250
-o Output.avi


On Sun, May 4, 2008 at 4:39 PM, Benoit <kvasarnov at gmail.com> wrote:
> Hi,
>
>  You were right, it seems like it is an interlaced video but yadif did not
>  work well (more artifacts than before. I used the pp=lb filter instead.
>
>  But I get some weird frames:
>  http://img509.imageshack.us/img509/9369/screenshot3yj0.png
>
>
>  As you can see there's no more artifact but it seems like two frames are
>  merged together.
>
>  Do you know how to fix it?
>
>
>
>
>
>  On Sat, May 3, 2008 at 1:16 AM, Justin Randall <jrrandall at gmail.com> wrote:
>
>  > Hi there,
>  >
>  > If your source is truely 100% teleclined, then this should work well for
>  > you..
>  >
>  > >> mencoder dvd://1 -nosound -vf
>  > pullup,hqdn3d=3:2:3:3,softskip,harddup -sws 9 -ofps 24000/1001 -ovc
>  > x264 -x264encopts
>  >
>  > threads=auto:qp=17:qpmax=28:subq=6:partitions=all:8x8dct:me=umh:subme=6:frameref=5:bframes=3:b_pyramid:b_rdo:weight_b:keyint=250
>  > -o Output.avi
>  >
>  > Otherwise you're dealing with interlaced and this will probably work
>  > better (WARNING: should take a LONG time to encode but the results
>  > should be good).
>  > >> mencoder dvd://1 -nosound -vf yadif,hqdn3d=3:2:3:3,harddup -sws 9
>  > -ovc x264 -x264encopts
>  >
>  > threads=auto:qp=17:qpmax=28:subq=6:partitions=all:8x8dct:me=umh:subme=6:frameref=5:bframes=3:b_pyramid:b_rdo:weight_b:keyint=250
>  > -o Output.avi
>  >
>  > Good luck and please let me know how these work for you.
>  >
>  > Thanks,
>  > Justin
>  >
>  > On Fri, May 2, 2008 at 4:48 PM, Benoit <kvasarnov at gmail.com> wrote:
>  > > Hello,
>  > >
>  > >  I bought some DVDs of my favorite anime but I experience problems
>  > encoding
>  > >  them.
>  > >
>  > >  It is an NTSC Mixed progressive and telecine video (mplayer switches
>  > back
>  > >  and forth between "30000/1001 fps NTSC" and "24000/1001 fps").
>  > >  I used the 'pullup' filter associated with 'softskip', which produce
>  > these
>  > >  results with a few frames:
>  > >  http://img136.imageshack.us/img136/1602/mencoderkg0.jpg
>  > >
>  > >  Here is the telecined frame that causes problems:
>  > >  http://img178.imageshack.us/img178/4061/screenshot1bf7.png
>  > >
>  > >  I downloaded the same episode from a torrent to compare the quality.
>  > The
>  > >  encoder did a great job and got this result:
>  > >  http://img353.imageshack.us/img353/3430/mencoder2lx7.jpg
>  > >
>  > >  I don't think this encoder used the same source as mine, but I'd like
>  > to get
>  > >  some advice from experienced encoders to help me fix my problem and get
>  > a
>  > >  similar quality.
>  > >
>  > >  The command line I used:
>  > >  mencoder dvd://1 -nosound -ovc x264 -x264encopts
>  > >
>  >  bitrate=1200:subq=4:partitions=all:me=umh:frameref=3:bframes=2:trellis=2:b_pyramid:weight_b:threads=auto
>  > >  -ofps 24000/1001 -vf pullup,softskip,scale=640:480 -fps 29.97 -o
>  > Output.avi
>  > >
>  > >
>  > >  Thanks a lot!
>  > >
>  > >
>  > >  Regards
>  > >  _______________________________________________
>  > >  MEncoder-users mailing list
>  > >  MEncoder-users at mplayerhq.hu
>  > >  https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>  > >
>  >
>  >
>  >
>  > --
>  > Justin Randall
>  > 617.733.4107
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>  > MEncoder-users at mplayerhq.hu
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>  >
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>



-- 
Justin Randall
617.733.4107