ffmpegの使い方やコマンド一覧をまとめました。動画リサイズ・静止画変換・フレーム補間について

$ ffmpeg \
-i inputMovie.mp4 \
-vf "scale=1920:1080,pad=1920:1080:0:0:black" \
-c:v mpeg4 \
-q:v 1 \
outputMovie.mp4

$ ffmpeg \
-i inputMovie.mov \
-ss 0 \
-t 30 \
-f image2 \
-vcodec mjpeg \
-qscale 1 -qmin 1 -qmax 1 \
-r 30 \
%06d.jpg

ffmpeg \
-sseof -1 \
-i inputMovie.mp4 \
-t 1 \
-f image2 \
-vcodec mjpeg \
-qscale 1 -qmin 1 -qmax 1 \
-r 1 \
%06d.jpg

$ ffmpeg \
-ss 0 \
-i inputMovie.mp4 \
-t 10 \
-q:v 1 \
outputMovie.mp4

$ ffmpeg \
-i inputMovie.mp4 \
-vf "movie=watermark.png [watermark];[in][watermark] overlay=main_w-overlay_w-50:main_h-overlay_h-50 [out]" \
outputMovie.mp4

$ ffprobe inputMovie.mp4

$ ffprobe inputMovie.mp4
ffprobe version 3.3.1 Copyright (c) 2007-2017 the FFmpeg developers
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
  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
  libavresample   3.  5.  0 /  3.  5.  0
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'inputMovie.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2mp41
    encoder         : Lavf57.71.100
  Duration: 00:00:37.00, start: 0.000000, bitrate: 100470 kb/s
    Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], 100468 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 30k tbc (default)
    Metadata:
      handler_name    : VideoHandler

$ ffprobe -show_streams -print_format json inputMovie.mp4

$ ffprobe -show_streams -print_format json inputMovie.mp4
(略)
"streams": [
        {
            "index": 0,
            "codec_name": "mpeg4",
            "codec_long_name": "MPEG-4 part 2",
            "profile": "Simple Profile",
            "codec_type": "video",
            "codec_time_base": "1001/30000",
            "codec_tag_string": "mp4v",
            "codec_tag": "0x7634706d",
            "width": 3840,
            "height": 2160,
            "coded_width": 3840,
            "coded_height": 2160,
            "has_b_frames": 0,
            "sample_aspect_ratio": "1:1",
            "display_aspect_ratio": "16:9",
            "pix_fmt": "yuv420p",
            "level": 1,
            "chroma_location": "left",
            "refs": 1,
            "quarter_sample": "false",
            "divx_packed": "false",
            "r_frame_rate": "30000/1001",
            "avg_frame_rate": "30000/1001",
            "time_base": "1/30000",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 1110120,
            "duration": "37.004000",
            "bit_rate": "100468987",
            "max_bit_rate": "100468987",
            "nb_frames": "1109",
            "disposition": {
                "default": 1,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0
            },
            "tags": {
                "language": "und",
                "handler_name": "VideoHandler"
            }
        }
    ]

$ ffmpeg \
-ss 0 \
-i inputMovie.mp4 \
-t 10 \
-vf "scale=3456:1944,pad=3456:1944:0:0:black" \
-c:v mpeg4 \
-q:v 1 \
-an \
-y \
outputMovie.mp4