[FFmpeg-user] How to extract 1 frame as JPEG per minute

[Ulf Zibis]

Am 20.12.18 um 01:20 schrieb Carl Eugen Hoyos:
> Command line and complete, uncut console output missing / I
> suspect your video does not start at "0".


Here it is:

$ ffmpeg -i CYD_atadenoise_H.264_mp3-q4.mp4 -vf
select='not(mod(n\,1500))' -vsync vfr -q:v 2 CYD_atadenoise_1%03d.jpg
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg
developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1
--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
--incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping
--enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca
--enable-libcdio --enable-libflite --enable-libfontconfig
--enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm
--enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
--enable-libopenmpt --enable-libopus --enable-libpulse
--enable-librubberband --enable-librsvg --enable-libshine
--enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh
--enable-libtheora --enable-libtwolame --enable-libvorbis
--enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265
--enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi
--enable-omx --enable-openal --enable-opengl --enable-sdl2
--enable-libdc1394 --enable-libdrm --enable-libiec61883
--enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264
--enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'CYD_atadenoise_H.264_mp3-q4.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
  Duration: 01:16:20.42, start: -0.120000, bitrate: 1403 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
704x576 [SAR 12:11 DAR 4:3], 1276 kb/s, 25 fps, 25 tbr, 12800 tbn, 50
tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: mp3 (mp4a / 0x6134706D), 48000 Hz, stereo,
s16p, 119 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x55a95987e280] deprecated pixel format used, make sure you
did set range correctly
Output #0, image2, to 'CYD_atadenoise_1%03d.jpg':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.83.100
    Stream #0:0(und): Video: mjpeg, yuvj420p(pc), 704x576 [SAR 12:11 DAR
4:3], q=2-31, 200 kb/s, 25 fps, 25 tbn, 25 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc57.107.100 mjpeg
    Side data:
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
frame=    2 fps=0.7 q=2.0 size=N/A time=00:00:00.16 bitrate=N/A
speed=0.0528x   frame=    2 fps=0.6 q=2.0 size=N/A time=00:00:00.16
bitrate=N/A speed=0.0453x   frame=    2 fps=0.5 q=2.0 size=N/A
time=00:00:00.16 bitrate=N/A speed=0.0397x   frame=    2 fps=0.4 q=2.0
size=N/A time=00:00:00.16 bitrate=N/A speed=0.0353x   frame=    2
fps=0.4 q=2.0 size=N/A time=00:00:00.16 bitrate=N/A speed=0.0318x  
frame=    2 fps=0.4 q=2.0 size=N/A time=00:00:00.16 bitrate=N/A
speed=0.0289x   frame=   77 fps=0.2 q=2.0 Lsize=N/A time=01:16:00.16
bitrate=N/A speed=11.6x   
video:3304kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: unknown

-Ulf