[FFmpeg-devel] fps filter anomaly

Tue Nov 24 03:36:37 CET 2015

I am attempting to convert a 0.2fps Slideshow.mov to 25fps using the fps filter.
The problem is the first output frame pauses for 5 seconds.
When viewing the output video I expect the frame counter to increment at a rate of 25fps but it remains on 0 for the first 5 seconds.

[root at ryan tmp]# wget http://tempsend.com/D6FFD35AE4/0B5B/calibri.ttf
[root at ryan tmp]# wget http://tempsend.com/05AAEDE44D/FFB2/Slideshow.MOV

[root at ryan tmp]# ffmpeg -threads 0 -y -i Slideshow.MOV -filter_complex "[0:v] fps='fps=25', drawtext='fontfile=calibri.ttf:fontsize=32:text=%{n}:x=20:y=20:fontcolor=white:box=1:boxcolor=0x00000099'" -an -r 25 Slideshow.mp4

ffmpeg version 2.8.2-static http://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 5.2.1 (Debian 5.2.1-23) 20151028
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --enable-libvidstab --enable-libsoxr --enable-frei0r --enable-libfribidi --disable-indev=sndio --disable-outdev=sndio --cc=gcc
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Slideshow.MOV':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    creation_time   : 2013-01-13 08:26:52
  Duration: 00:00:55.00, start: 0.000000, bitrate: 206 kb/s
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 126 kb/s (default)
    Metadata:
      creation_time   : 2013-01-13 08:26:52
      handler_name    : Core Media Data Handler
    Stream #0:1(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 320x460, 78 kb/s, 0.20 fps, 0.20 tbr, 600 tbn, 1200 tbc (default)
    Metadata:
      creation_time   : 2013-01-13 08:26:52
      handler_name    : Core Media Data Handler
      encoder         : H.264
[libx264 @ 0x55fac80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
[libx264 @ 0x55fac80] profile High, level 2.1
[libx264 @ 0x55fac80] 264 - core 148 r209 7599210 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=14 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, mp4, to 'Slideshow.mp4':
  Metadata:
    major_brand     : qt
    minor_version   : 0
    compatible_brands: qt
    encoder         : Lavf56.40.101
    Stream #0:0: Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 320x460, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc56.60.100 libx264
Stream mapping:
  Stream #0:1 (h264) -> fps
  drawtext -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[output stream 0:0 @ 0x563cf80] 100 buffers queued in output stream 0:0, something may be wrong.
Past duration 123.999992 too large
    Last message repeated 623 times
Past duration 123.999992 too large   207kB time=00:00:27.56 bitrate=  61.4kbits/s dup=124 drop=0
    Last message repeated 624 times
Past duration 123.999992 too large    432kB time=00:00:52.56 bitrate=  67.4kbits/s dup=124 drop=0
frame= 1375 fps=1085 q=-1.0 Lsize=     464kB time=00:00:54.92 bitrate=  69.2kbits/s dup=124 drop=0
video:447kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 3.793817%
[libx264 @ 0x55fac80] frame I:10    Avg QP:15.34  size: 28673
[libx264 @ 0x55fac80] frame P:343   Avg QP:20.96  size:   206
[libx264 @ 0x55fac80] frame B:1022  Avg QP:30.35  size:    98
[libx264 @ 0x55fac80] consecutive B-frames:  0.9%  0.0%  0.2% 98.9%
[libx264 @ 0x55fac80] mb I  I16..4:  8.1% 45.3% 46.6%
[libx264 @ 0x55fac80] mb P  I16..4:  0.0%  0.2%  0.3%  P16..4:  0.8%  0.3%  0.3%  0.0%  0.0%    skip:98.2%
[libx264 @ 0x55fac80] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  0.4%  0.2%  0.2%  direct: 0.1%  skip:99.1%  L0:53.9% L1:39.8% BI: 6.3%
[libx264 @ 0x55fac80] 8x8 transform intra:42.7% inter:10.8%
[libx264 @ 0x55fac80] coded y,uvDC,uvAC intra: 88.2% 83.0% 73.4% inter: 0.3% 0.1% 0.0%
[libx264 @ 0x55fac80] i16 v,h,dc,p: 27% 15% 13% 45%
[libx264 @ 0x55fac80] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 18% 16%  5%  5%  7%  7%  8%  9%
[libx264 @ 0x55fac80] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 21% 11%  6%  6%  7%  7%  9%  8%
[libx264 @ 0x55fac80] i8c dc,h,v,p: 44% 24% 23%  9%
[libx264 @ 0x55fac80] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x55fac80] ref P L0: 59.0%  3.7% 17.9% 19.3%
[libx264 @ 0x55fac80] ref B L0: 61.0% 30.2%  8.8%
[libx264 @ 0x55fac80] ref B L1: 91.0%  9.0%
[libx264 @ 0x55fac80] kb/s:66.50
[root at ryan tmp]#