[FFmpeg-trac] #3019(avfilter:new): fieldmatch + decimate causes out-of-sync audio

FFmpeg trac at avcodec.org
Wed Oct 2 17:29:41 CEST 2013


#3019: fieldmatch + decimate causes out-of-sync audio
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  spookybathtub                      |                   Status:  new
                 Type:  defect       |                Component:  avfilter
             Priority:  normal       |               Resolution:
              Version:  2.0.1        |               Blocked By:
             Keywords:  pullup       |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by spookybathtub):

 Same thing happens with mpeg4.  I will try git later, I've been using
 macports because it's so easy.
 {{{
 ffmpeg -ss 00:02:00 -i NCIS.ts -t 30 -vf "fieldmatch,
 yadif=deint=interlaced, decimate" -pix_fmt yuv420p -acodec copy -vcodec
 mpeg4 ncis-mpeg4.mkv
 ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers
   built on Sep 25 2013 06:03:35 with Apple clang version 4.1
 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
   configuration: --prefix=/opt/local --enable-swscale --enable-avfilter
 --enable-avresample --enable-libmp3lame --enable-libvorbis --enable-
 libopus --enable-libtheora --enable-libschroedinger --enable-libopenjpeg
 --enable-libmodplug --enable-libvpx --enable-libspeex --enable-libass
 --enable-libbluray --enable-gnutls --enable-libfreetype --disable-
 outdev=xv --mandir=/opt/local/share/man --enable-shared --enable-pthreads
 --cc=/usr/bin/clang --arch=x86_64 --enable-yasm --enable-gpl --enable-
 postproc --enable-libx264 --enable-libxvid
   libavutil      52. 38.100 / 52. 38.100
   libavcodec     55. 18.102 / 55. 18.102
   libavformat    55. 12.100 / 55. 12.100
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 79.101 /  3. 79.101
   libavresample   1.  1.  0 /  1.  1.  0
   libswscale      2.  3.100 /  2.  3.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, mpegts, from 'NCIS.ts':
   Duration: 00:58:56.86, start: 10892.598633, bitrate: 11280 kb/s
   Program 258
     Stream #0:0[0xe0]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002),
 yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn,
 59.94 tbc
     Stream #0:1[0x80](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
 5.1(side), fltp, 384 kb/s
     Stream #0:2[0x81](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
 mono, fltp, 96 kb/s (visual impaired)
 Output #0, matroska, to 'ncis-mpeg4.mkv':
   Metadata:
     encoder         : Lavf55.12.100
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 1920x1080 [SAR
 1:1 DAR 16:9], q=2-31, 200 kb/s, 1k tbn, 23.98 tbc
     Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz,
 5.1(side), 384 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video -> mpeg4)
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 Frame #138 at 5.39704 is still interlacedB time=00:00:04.74
 bitrate=2319.6kbits/s
 frame=  720 fps= 26 q=31.0 Lsize=    6871kB time=00:00:30.03
 bitrate=1874.3kbits/s
 video:5455kB audio:1401kB subtitle:0 global headers:0kB muxing overhead
 0.207562%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/3019#comment:3>
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