[FFmpeg-user] Why Does ffprobe Report an Incorrect Number of Frames?

John G skeeve99 at yahoo.com.au
Wed May 7 14:28:50 CEST 2014



> John G <skeeve99 <at> yahoo.com.au> writes:

> >     c:\> ffmpeg -i sample.avi  -f image2 -c:v png Img%%04d.png

> Complete, uncut console output missing.

Sorry about that(!)... Here's a typical output (without the 'heartbeat' lines and the lines describing
the configuration of the image build manually 'wrapped'):-

ffmpeg version N-62509-g97751e1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 17 2014 22:01:31 with gcc 4.8.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth 
                 --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls 
                 --enable-iconv --enable-libass --enable-libbluray --enable-libcaca 
                 --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug 
                 --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb 
                 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-ibschroedinger 
                 --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame 
                 --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc 
                 --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 
                 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink 
                 --enable-zlib
  libavutil      52. 77.100 / 52. 77.100
  libavcodec     55. 58.103 / 55. 58.103
  libavformat    55. 37.100 / 55. 37.100
  libavdevice    55. 13.100 / 55. 13.100
  libavfilter     4.  4.100 /  4.  4.100
  libswscale      2.  6.100 /  2.  6.100
  libswresample   0. 18.100 /  0. 18.100
  libpostproc    52.  3.100 / 52.  3.100
Input #0, avi, from 'sample.avi':
  Metadata:
    encoder         : Lavf55.37.100
  Duration: 00:00:35.00, start: 0.000000, bitrate: 1707 kb/s
    Stream #0:0: Video: msmpeg4v3 (MP43 / 0x3334504D), yuv420p, 639x361, 1668 kb/s, 200 fps, 200 tbr, 200 tbn, 200 tbc
    Metadata:
      title           : ~temp.avi Video #1
Output #0, image2, to 'Img%04d.png':
  Metadata:
    encoder         : Lavf55.37.100
    Stream #0:0: Video: png, rgb24, 639x361, q=2-31, 200 kb/s, 90k tbn, 200 tbc
    Metadata:
      title           : ~temp.avi Video #1
Stream mapping:
  Stream #0:0 -> #0:0 (msmpeg4 -> png)
Press [q] to stop, [?] for help

[...'heartbeat' messages removed...]

frame=   18 fps=0.0 q=0.0 size=N/A time=00:00:00.08 bitrate=N/A dup=13 drop=0    
e=N/A dup=1477 drop=0    
A dup=2862 drop=0    
p=4275 drop=0    
video:1432829kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1257260449792.000000%

Thanks.

-John
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