[FFmpeg-trac] #993(undetermined:new): ffmpeg / ffplay fails to correctly decode interlaced h264 (MTS container) when using default number of threads

[FFmpeg]

#993: ffmpeg / ffplay fails to correctly decode interlaced h264 (MTS container)
when using default number of threads
-------------------------------------+-------------------------------------
             Reporter:  ls           |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by ls):

 The full ffmpeg output is below. I will provide a sample within the next
 days. My current sample cannot be uploaded due to privacy (participants of
 an experiment).

 {{{
 ~/ffmpeg-trunk/bin/ffmpeg -i '00001.MTS' -async 1  -codec:v libx264
 -preset ultrafast -crf 20 -codec:a libfaac -ab 256k '00001.mp4'
 ffmpeg version git-2012-02-10-394d41e Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Feb 11 2012 00:00:48 with gcc 4.6.1
   configuration: --prefix=/home/ls/ffmpeg-trunk --enable-shared --disable-
 static --enable-gpl --enable-nonfree --enable-libmp3lame --enable-libx264
 --enable-libxvid --enable-sram --cpu=core2 --enable-hwaccel=h264_vaapi
 --enable-hwaccel=mpeg2_vaapi --enable-hwaccel=mpeg4_vaapi --enable-libfaac
 --enable-x11grab --disable-ffserver --enable-libass --enable-libfreetype
   libavutil      51. 39.100 / 51. 39.100
   libavcodec     54.  1.100 / 54.  1.100
   libavformat    54.  0.100 / 54.  0.100
   libavdevice    53.  4.100 / 53.  4.100
   libavfilter     2. 62.100 /  2. 62.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0.  6.100 /  0.  6.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, mpegts, from '00001.MTS':
   Duration: 00:03:01.51, start: 1.000033, bitrate: 17122 kb/s
   Program 1
     Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p,
 1920x1080 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo,
 s16, 256 kb/s
     Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] /
 0x0090)
 File '00001.mp4' already exists. Overwrite ? [y/N] y
 w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
 [libx264 @ 0x146eb20] using SAR=1/1
 [libx264 @ 0x146eb20] using cpu capabilities: MMX2 SSE2Fast SSSE3
 FastShuffle SSE4.2
 [libx264 @ 0x146eb20] profile Constrained Baseline, level 4.2
 [libx264 @ 0x146eb20] 264 - core 120 r0+2 a3f4407 - H.264/MPEG-4 AVC codec
 - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options:
 cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1
 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0
 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6
 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0
 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25
 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=20.0 qcomp=0.60 qpmin=0
 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
 Output #0, mp4, to '00001.mp4':
   Metadata:
     encoder         : Lavf54.0.100
     Stream #0:0: Video: h264 (![0][0][0] / 0x0021), yuv420p, 1920x1080
 [SAR 1:1 DAR 16:9], q=-1--1, 50 tbn, 50 tbc
     Stream #0:1: Audio: aac (@[0][0][0] / 0x0040), 48000 Hz, stereo, s16,
 256 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> libx264)
   Stream #0:1 -> #0:1 (ac3 -> libfaac)
 Press [q] to stop, [?] for help
 frame= 1579 fps= 62 q=-1.0 Lsize=   59700kB time=00:00:31.08
 bitrate=15734.1kbits/s dup=790 drop=0
 video:59046kB audio:627kB global headers:0kB muxing overhead 0.044877%
 [libx264 @ 0x146eb20] frame I:7     Avg QP:17.43  size:254007
 [libx264 @ 0x146eb20] frame P:1572  Avg QP:20.39  size: 37331
 [libx264 @ 0x146eb20] mb I  I16..4: 100.0%  0.0%  0.0%
 [libx264 @ 0x146eb20] mb P  I16..4:  8.1%  0.0%  0.0%  P16..4: 26.0%  0.0%
 0.0%  0.0%  0.0%    skip:65.9%
 [libx264 @ 0x146eb20] coded y,uvDC,uvAC intra: 43.3% 45.6% 12.0% inter:
 14.9% 12.1% 0.4%
 [libx264 @ 0x146eb20] i16 v,h,dc,p: 36% 24% 26% 14%
 [libx264 @ 0x146eb20] i8c dc,h,v,p: 49% 20% 26%  5%
 [libx264 @ 0x146eb20] kb/s:15316.61
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/993#comment:2>
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