[FFmpeg-trac] #3484(undetermined:new): FFmpeg timing control problem

Thu Mar 20 21:37:29 CET 2014

#3484: FFmpeg timing control problem
-------------------------------------+-------------------------------------
             Reporter:  Spencerg     |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  concat,      |               Blocked By:
  time, control                      |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:  I want to control the display time of individual
 frames sufficient to allow me to mate with segments of an audio timed to
 hundredths of a second.  Some frames seemed not to display at all.  Some
 displayed far longer than others and for times that differed greatly from
 "duration" specified in a concat demuxer control file.

 How to reproduce:
 As soon as I can figure out how, I will submit
 "ffmpegFailsToControlFrameTimes.7z" containing 5 png files (tst0.png, ...
 tst4.png), a concat demuxer control file (concat3.txt), and the output
 produced by the version of FFmpeg I downloaded earlier today (tst2g.mp4).

 The ffmpeg command and output appear below.

 >ffmpeg -y -f concat -i concat3.txt -pix_fmt yuv420p tst2g.mp4
 ffmpeg version N-61620-ge555e1b Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Mar 19 2014 22:01:32 with gcc 4.8.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads
 --enable-av
 isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
 --enab
 le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-
 libfreetyp
 e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
 --ena
 ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-l
 ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
 --enable-libsp
 eex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-
 libvo-aa
 cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-
 libwavp
 ack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
 --enable
 -zlib
   libavutil      52. 67.100 / 52. 67.100
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 34.101 / 55. 34.101
   libavdevice    55. 11.100 / 55. 11.100
   libavfilter     4.  3.100 /  4.  3.100
   libswscale      2.  5.102 /  2.  5.102
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
 Input #0, concat, from 'concat3.txt':
   Duration: 00:00:12.00, start: 0.000000, bitrate: 0 kb/s
     Stream #0:0: Video: png, pal8, 480x480, 25 tbr, 25 tbn, 25 tbc
 [libx264 @ 042ae100] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
 [libx264 @ 042ae100] profile High, level 3.0
 [libx264 @ 042ae100] 264 - core 142 r2409 d6b4e63 - H.264/MPEG-4 AVC codec
 - Cop
 yleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1
 ref=3 deb
 lock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
 mixed_ref=1 m
 e_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11
 fast_pskip=1 chro
 ma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0
 decimate=1 i
 nterlaced=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
 scenec
 ut=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, mp4, to 'tst2g.mp4':
   Metadata:
     encoder         : Lavf55.34.101
     Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p,
 480x48
 0, q=-1--1, 12800 tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (png -> libx264)
 Press [q] to stop, [?] for help
 frame=  276 fps=0.0 q=-1.0 Lsize=      16kB time=00:00:10.96 bitrate=
 12.3kbits
 /s dup=271 drop=0
 video:12kB audio:0kB subtitle:0 data:0 global headers:0kB muxing overhead
 32.223
 881%
 [libx264 @ 042ae100] frame I:2     Avg QP:20.30  size:  2128
 [libx264 @ 042ae100] frame P:70    Avg QP:10.40  size:    44
 [libx264 @ 042ae100] frame B:204   Avg QP:12.67  size:    23
 [libx264 @ 042ae100] consecutive B-frames:  1.4%  0.0%  0.0% 98.6%
 [libx264 @ 042ae100] mb I  I16..4: 21.0% 74.2%  4.8%
 [libx264 @ 042ae100] mb P  I16..4:  0.0%  0.0%  0.0%  P16..4:  0.0%  0.0%
 0.0%
  0.0%  0.0%    skip:99.9%
 [libx264 @ 042ae100] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.3%  0.0%
 0.0%
  direct: 0.0%  skip:99.7%  L0:69.7% L1:30.3% BI: 0.0%
 [libx264 @ 042ae100] 8x8 transform intra:73.8% inter:0.0%
 [libx264 @ 042ae100] coded y,uvDC,uvAC intra: 2.8% 2.7% 2.6% inter: 0.0%
 0.0% 0.
 0%
 [libx264 @ 042ae100] i16 v,h,dc,p: 54% 31% 16%  0%
 [libx264 @ 042ae100] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 78%  7% 16%  0%  0%
 0%  0%
  0%  0%
 [libx264 @ 042ae100] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 51% 22% 16%  1%  1%
 2%  2%
  1%  2%
 [libx264 @ 042ae100] i8c dc,h,v,p: 97%  1%  1%  0%
 [libx264 @ 042ae100] Weighted P-Frames: Y:0.0% UV:0.0%
 [libx264 @ 042ae100] ref P L0: 74.0%  2.0% 24.0%
 [libx264 @ 042ae100] ref B L0: 33.0% 67.0%
 [libx264 @ 042ae100] kb/s:8.70

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3484>
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