[FFmpeg-trac] #1682(undetermined:new): DVD '-target' option affects video filters

[FFmpeg]

#1682: DVD '-target' option affects video filters
-------------------------------------+-------------------------------------
             Reporter:  intracube    |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  dvd target   |               Blocked By:
  preset video filter deinterlace    |  Reproduced by developer:  0
  yadif scale                        |
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Trying to convert an interlaced video which isn't a valid DVD resolution
 (such as 1920x1080i) to either 720x576 at 50i or 720x576 at 25p DVD video using
 '-target' stops video filters from working properly.

 The -target option looks like it's re-scaling the video *before* the -vf
 video filter chain. This messes up the field interleaving and stops de-
 interlacers like yadif from working.

 Encoding without using '-target' works as expected.

 Examples:
 **This creates badly de-interlaced video**:
 ffmpeg -i 1080i.MTS -vf yadif=0,scale=720:576 -r 25 -target pal-dvd
 -aspect 16:9 output1.mpg
 (I can paste console output if necessary - but I could see no errors
 there)

 This creates clean de-interlaced h264 video:
 ffmpeg -i 1080i.MTS -vf yadif=0,scale=720:576 -r 25 -c:v libx264 -crf 18
 -preset fast -c:a ac3 -ac 2 -b:a 224k -aspect 16:9 output2.mp4

 This creates clean de-interlaced mpeg2 video:
 ffmpeg -i 1080i.MTS -vf yadif=0,scale=720:576 -r 25 -c:v mpeg2video -b
 8000k -c:a ac3 -ac 2 -b:a 224k -aspect 16:9 output3.mpg
 - but this isn't compatible with dvdauthor.
 dvdauthor errors:
 WARN: Skipping sector, waiting for first VOBU...
 WARN: Skipping sector, waiting for first VOBU...
 WARN: Skipping sector, waiting for first VOBU...
 ...
 ERR: SCR moves backwards, remultiplex input: 4563416160 < 4563429486

 Repeatable:
 Always.

 Ffmpeg version:
 ffmpeg version N-43891-g65b552c Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug 25 2012 15:54:15 with gcc 4.6 (SUSE Linux)
   configuration: --prefix=/home/compile/ffmpeg
 --bindir=/home/compile/ffmpeg/bin
 --datadir=/home/compile/ffmpeg/share/ffmpeg
 --libdir=/home/compile/ffmpeg/lib --shlibdir=/home/compile/ffmpeg/lib
 --incdir=/home/compile/ffmpeg/include
 --mandir=/home/compile/ffmpeg/share.man --enable-avresample --enable-
 x11grab --enable-libdc1394 --enable-libfaac --enable-libmp3lame --enable-
 librtmp --enable-libtheora --enable-libtwolame --enable-libv4l2 --enable-
 libvpx --enable-libx264 --enable-libxvid --enable-gpl --enable-nonfree
   libavutil      51. 70.100 / 51. 70.100
   libavcodec     54. 54.100 / 54. 54.100
   libavformat    54. 25.104 / 54. 25.104
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3. 13.101 /  3. 13.101
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1682>
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