FFMPEG으로 비디오 파일에서 10초만 짤라서 만들기

핸드폰으로 비디오 찍어서 후딱 편집해서 공유할때 좋은 tip1,

FFMPEG으로 자동으로 10초씩 짤라놓는 방법

ffmpeg -loglevel quiet -n -r 60 -ss 2 -t 10 -i 0613/20190613_000.mp4 test_10_sec.mp4
ffmpeg -loglevel quiet -n -r 60 -ss 2 -t 10 -c:v h264 -i 0613/20190613_000.mp4 test_10_sec2.mp4

ffmpeg -loglevel quiet -n -ss 2 -t 10 -i 0613/20190613_000.mp4 -c:v h264 test_10_sec3.mp4

 

h264 codec이 NVidia Card를 이용하지 않으면 최신 드라이버로 update하고 FFMPEG을 다시 빌드하면 저절로 nvenc_h264 codec을 선택하게 됨. 엄청 빠름.

 

----------------

-loglevel 
-n : never overwrite output file
-i : input file
-r : frame rate
-vcodec : video codec
-s : frame size WxH
-ss : start offset 00:00:30
-t : time duration 00:00:05

 

----------------

$ ffmpeg -hwaccels
ffmpeg version N-94455-g01994c93db Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8 (Ubuntu 8.3.0-6ubuntu1~18.10.1)
  configuration: 
  libavutil      56. 33.100 / 56. 33.100
  libavcodec     58. 55.100 / 58. 55.100
  libavformat    58. 30.100 / 58. 30.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 58.100 /  7. 58.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
Hardware acceleration methods:
vdpau
cuda
vaapi
cuvid

.....

-----------------

$ ffmpeg -codecs
ffmpeg version N-94455-g01994c93db Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8 (Ubuntu 8.3.0-6ubuntu1~18.10.1)
  configuration: 
  libavutil      56. 33.100 / 56. 33.100
  libavcodec     58. 55.100 / 58. 55.100
  libavformat    58. 30.100 / 58. 30.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 58.100 /  7. 58.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
Codecs:
 D..... = Decoding supported
 .E.... = Encoding supported
 ..V... = Video codec
 ..A... = Audio codec
 ..S... = Subtitle codec
 ...I.. = Intra frame-only codec
 ....L. = Lossy compression
 .....S = Lossless compression
 -------

 D.V.L. h263i                Intel H.263
 DEV.L. h263p                H.263+ / H.263-1998 / H.263 version 2
 DEV.LS h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (decoders: h264 h264_v4l2m2m h264_cuvid ) (encoders: h264_nvenc h264_v4l2m2m h264_vaapi nvenc nvenc_h264 )
 D.VIL. hap                  Vidvox Hap
 DEV.L. hevc                 H.265 / HEVC (High Efficiency Video Coding) (decoders: hevc hevc_v4l2m2m hevc_cuvid ) (encoders: nvenc_hevc hevc_nvenc hevc_v4l2m2m hevc_vaapi )

 D.V.L. msmpeg4v1            MPEG-4 part 2 Microsoft variant version 1
 DEV.L. msmpeg4v2            MPEG-4 part 2 Microsoft variant version 2
 DEV.L. msmpeg4v3            MPEG-4 part 2 Microsoft variant version 3 (decoders: msmpeg4 ) (encoders: msmpeg4 )

.....

-----------------

$ ffmpeg -encoders
ffmpeg version N-94455-g01994c93db Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8 (Ubuntu 8.3.0-6ubuntu1~18.10.1)
  configuration: 
  libavutil      56. 33.100 / 56. 33.100
  libavcodec     58. 55.100 / 58. 55.100
  libavformat    58. 30.100 / 58. 30.100
  libavdevice    58.  9.100 / 58.  9.100
  libavfilter     7. 58.100 /  7. 58.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
Encoders:
 V..... = Video
 A..... = Audio
 S..... = Subtitle
 .F.... = Frame-level multithreading
 ..S... = Slice-level multithreading
 ...X.. = Codec is experimental
 ....B. = Supports draw_horiz_band
 .....D = Supports direct rendering method 1

....

 V..... h263                 H.263 / H.263-1996
 V..... h263_v4l2m2m         V4L2 mem2mem H.263 encoder wrapper (codec h263)
 V.S... h263p                H.263+ / H.263-1998 / H.263 version 2
 V..... h264_nvenc           NVIDIA NVENC H.264 encoder (codec h264)
 V..... h264_v4l2m2m         V4L2 mem2mem H.264 encoder wrapper (codec h264)
 V..... h264_vaapi           H.264/AVC (VAAPI) (codec h264)
 V..... nvenc                NVIDIA NVENC H.264 encoder (codec h264)
 V..... nvenc_h264           NVIDIA NVENC H.264 encoder (codec h264)
 V..... nvenc_hevc           NVIDIA NVENC hevc encoder (codec hevc)
 V..... hevc_nvenc           NVIDIA NVENC hevc encoder (codec hevc)
 V..... hevc_v4l2m2m         V4L2 mem2mem HEVC encoder wrapper (codec hevc)
 V..... hevc_vaapi           H.265/HEVC (VAAPI) (codec hevc)

.....

.....

FFMPEG으로 Rotate하기

# rotate video -filter:v transpose=1 or 2. 1=90 cw, 2=90 ccw
# -filter:v transpose=1