[FFmpeg-trac] #4643(undetermined:reopened): Multiple "Past duration 0.XXXXXX too large" and "dup=0 drop=1" messages when reencoding a H.264 source to x264

FFmpeg trac at avcodec.org
Fri May 19 02:02:38 EEST 2017


#4643: Multiple "Past duration 0.XXXXXX too large" and "dup=0 drop=1" messages
when reencoding a H.264 source to x264
-------------------------------------+-------------------------------------
             Reporter:  birdie       |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  minor        |                Component:
              Version:  git-master   |  undetermined
             Keywords:  dts          |               Resolution:
  regression                         |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by bubbleguuum):

 This 4K hevc video exhibits this issue using ffmpeg 3.3, resulting in
 choppy playback.

 As mentioned in previous post, specifying a fps filter makes the error
 goes away.
 Yet it would be great to have ffmpeg produce a non choppy video by
 default.


 Download LG_4K_View-the-Feeling.mp4 at http://demo-
 uhd3d.com/fiche.php?cat=uhd&id=101


 ffmpeg  -i LG_4K_View-the-Feeling.mp4 -c:v libx264 -vf 'scale=-1:720' -c:a
 copy  -f matroska - > /dev/null
 ffmpeg version 3.3-tessus Copyright (c) 2000-2017 the FFmpeg developers
   built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
   configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-
 version=tessus --enable-avisynth --enable-fontconfig --enable-gpl
 --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm
 --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb
 --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
 --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-
 libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-
 libxavs --enable-libxvid --enable-libzmq --enable-libzvbi --enable-
 version3 --disable-ffplay --disable-indev=qtkit
   libavutil      55. 58.100 / 55. 58.100
   libavcodec     57. 89.100 / 57. 89.100
   libavformat    57. 71.100 / 57. 71.100
   libavdevice    57.  6.100 / 57.  6.100
   libavfilter     6. 82.100 /  6. 82.100
   libswscale      4.  6.100 /  4.  6.100
   libswresample   2.  7.100 /  2.  7.100
   libpostproc    54.  5.100 / 54.  5.100
 Input #0, mpegts, from 'LG_4K_View-the-Feeling.mp4':
   Duration: 00:01:56.84, start: 4200.000000, bitrate: 24904 kb/s
   Program 1
     Stream #0:0[0x1011]: Video: hevc (Main) (HEVC / 0x43564548),
 yuv420p(tv), 3840x2160 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn,
 29.97 tbc
     Stream #0:1[0x1100](und): Audio: aac (LC) ([15][0][0][0] / 0x000F),
 48000 Hz, stereo, fltp, 176 kb/s
 Stream mapping:
   Stream #0:0 -> #0:0 (hevc (native) -> h264 (libx264))
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 [libx264 @ 0x7feb4f801200] using SAR=1/1
 [libx264 @ 0x7feb4f801200] using cpu capabilities: MMX2 SSE2Fast SSSE3
 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
 [libx264 @ 0x7feb4f801200] profile High, level 3.1
 [libx264 @ 0x7feb4f801200] 264 - core 148 - H.264/MPEG-4 AVC codec -
 Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=1
 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1
 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1
 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12
 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0
 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25
 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
 Output #0, matroska, to 'pipe:':
   Metadata:
     encoder         : Lavf57.71.100
     Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuv420p,
 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 29.97 fps, 1k tbn, 29.97 tbc
     Metadata:
       encoder         : Lavc57.89.100 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
     Stream #0:1(und): Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz,
 stereo, fltp, 176 kb/s
 Past duration 0.999992 too large    2604kB time=00:00:12.21
 bitrate=1746.1kbits/s dup=0 drop=12 speed=1.14x
 Past duration 0.999657 too large    3797kB time=00:00:17.25
 bitrate=1802.2kbits/s dup=0 drop=15 speed=1.09x
 Past duration 0.999657 too large    6187kB time=00:00:27.24
 bitrate=1860.4kbits/s dup=0 drop=24 speed=1.06x
     Last message repeated 1 times
 Past duration 0.999657 too large    6714kB time=00:00:29.37
 bitrate=1872.0kbits/s dup=0 drop=26 speed=1.06x
 Past duration 0.999657 too large    6962kB time=00:00:30.26
 bitrate=1884.4kbits/s dup=0 drop=27 speed=1.05x
 Past duration 0.999657 too large   10387kB time=00:00:43.30
 bitrate=1965.0kbits/s dup=0 drop=38 speed=1.02x
 Past duration 0.999657 too large   12830kB time=00:00:48.93
 bitrate=2148.1kbits/s dup=0 drop=41 speed=0.991x
     Last message repeated 1 times
 Past duration 0.999657 too large   14292kB time=00:00:52.66
 bitrate=2223.0kbits/s dup=0 drop=43 speed=0.984x
 Past duration 0.999657 too large   14363kB time=00:00:53.72
 bitrate=2190.1kbits/s dup=0 drop=45 speed=0.985x
 Past duration 0.999657 too large   15570kB time=00:00:56.67
 bitrate=2250.7kbits/s dup=0 drop=79 speed=0.983x
     Last message repeated 5 times
 Past duration 0.999657 too large   15722kB time=00:00:57.31
 bitrate=2247.3kbits/s dup=0 drop=94 speed=0.985x
     Last message repeated 9 times
 Past duration 0.999657 too large   15950kB time=00:00:57.67
 bitrate=2265.6kbits/s dup=0 drop=94 speed=0.983x
     Last message repeated 10 times
 Past duration 0.999657 too large   16196kB time=00:00:58.03
 bitrate=2286.1kbits/s dup=0 drop=94 speed=0.98x
     Last message repeated 10 times
 Past duration 0.999657 too large   16485kB time=00:00:58.37
 bitrate=2313.3kbits/s dup=0 drop=94 speed=0.977x
     Last message repeated 8 times
 Past duration 0.999657 too large   16668kB time=00:00:58.67
 bitrate=2327.0kbits/s dup=0 drop=94 speed=0.973x
     Last message repeated 10 times
 Past duration 0.999657 too large   16996kB time=00:00:59.03
 bitrate=2358.2kbits/s dup=0 drop=94 speed=0.971x
     Last message repeated 4 times
 Past duration 0.999657 too large   41520kB time=00:01:52.79
 bitrate=3015.4kbits/s dup=0 drop=351 speed=0.958x
     Last message repeated 22 times
 Past duration 0.999657 too large   41594kB time=00:01:53.56
 bitrate=3000.3kbits/s dup=0 drop=352 speed=0.96x
     Last message repeated 19 times
 Past duration 0.999657 too large   41663kB time=00:01:54.22
 bitrate=2987.9kbits/s dup=0 drop=352 speed=0.962x
     Last message repeated 30 times
 Past duration 0.999657 too large   41716kB time=00:01:55.25
 bitrate=2965.1kbits/s dup=0 drop=352 speed=0.966x
     Last message repeated 28 times
 frame= 3142 fps= 26 q=-1.0 Lsize=   41873kB time=00:01:58.62
 bitrate=2891.7kbits/s dup=0 drop=352 speed=0.99x
 video:39061kB audio:2776kB subtitle:0kB other streams:0kB global
 headers:0kB muxing overhead: 0.085406%
 [libx264 @ 0x7feb4f801200] frame I:26    Avg QP:18.86  size:147675
 [libx264 @ 0x7feb4f801200] frame P:879   Avg QP:22.20  size: 28143
 [libx264 @ 0x7feb4f801200] frame B:2237  Avg QP:25.73  size:  5105
 [libx264 @ 0x7feb4f801200] consecutive B-frames:  3.7%  3.0%  3.4% 89.9%
 [libx264 @ 0x7feb4f801200] mb I  I16..4: 14.2% 56.8% 28.9%
 [libx264 @ 0x7feb4f801200] mb P  I16..4:  2.4%  7.1%  1.2%  P16..4: 33.6%
 16.3% 11.5%  0.0%  0.0%    skip:27.9%
 [libx264 @ 0x7feb4f801200] mb B  I16..4:  0.2%  0.5%  0.1%  B16..8: 30.7%
 4.1%  1.4%  direct: 2.1%  skip:60.7%  L0:39.3% L1:50.1% BI:10.7%
 [libx264 @ 0x7feb4f801200] 8x8 transform intra:63.7% inter:66.5%
 [libx264 @ 0x7feb4f801200] coded y,uvDC,uvAC intra: 56.8% 50.7% 28.7%
 inter: 13.6% 10.7% 2.2%
 [libx264 @ 0x7feb4f801200] i16 v,h,dc,p: 31% 25%  6% 38%
 [libx264 @ 0x7feb4f801200] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 14% 22%  7%
 6%  7%  6% 10%  7%
 [libx264 @ 0x7feb4f801200] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 18% 12% 12% 10%
 9% 10%  8% 13%  8%
 [libx264 @ 0x7feb4f801200] i8c dc,h,v,p: 65% 17% 14%  5%
 [libx264 @ 0x7feb4f801200] Weighted P-Frames: Y:12.1% UV:10.5%
 [libx264 @ 0x7feb4f801200] ref P L0: 63.6% 18.2% 10.9%  7.3%  0.1%
 [libx264 @ 0x7feb4f801200] ref B L0: 89.2%  7.8%  2.9%
 [libx264 @ 0x7feb4f801200] ref B L1: 94.2%  5.8%
 [libx264 @ 0x7feb4f801200] kb/s:2649.89

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4643#comment:24>
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