Add a copy profile

[suntong]

So as to use Seg (Cut) operation without re-encoding.

[suntong]

Impossible to use the copy profile with Cut:

$ ffcvt -force -f "$FFCVT_FTC" -t copy -C 00:00:40-00:00:50 -C 00:00:53-00:00:56

== Transcoding: Nice_scenic_videos_from_dashcam_With_Evening_sunset_view.mp4
] ffmpeg -i Nice_scenic_videos_from_dashcam_With_Evening_sunset_view.mp4 -speed 2 -af volume=3.2,channelmap=channel_layout=5.1 -c:v copy -c:a copy -b:a 64k -c:s copy -y -filter_complex [0:v]trim=start=40:end=50,setpts=PTS-STARTPTS[v0];[0:a]atrim=start=40:end=50,asetpts=PTS-STARTPTS[a0];[0:v]trim=start=53:end=56,setpts=PTS-STARTPTS[v1];[0:a]atrim=start=53:end=56,asetpts=PTS-STARTPTS[a1];[v0][a0][v1][a1]concat=n=2:v=1:a=1[vo][ao] -map [vo] -map [ao] Nice_scenic_videos_from_dashcam_With_Evening_sunset_view_.mkv
2022/01/02 12:35:52 ffcvt: Exec error - exit status 1

ffmpeg version 4.4-6ubuntu5 Copyright (c) 2000-2021 the FFmpeg developers
  built with gcc 11 (Ubuntu 11.2.0-7ubuntu1)
Input #0, matroska,webm, from 'Nice_scenic_videos_from_dashcam_With_Evening_sunset_view.mp4':
  Metadata:
    ENCODER         : Lavf58.20.100
  Duration: 00:05:40.30, start: -0.007000, bitrate: 235 kb/s
  Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, bt709), 426x240, SAR 1:1 DAR 71:40, 29.97 fps, 29.97 tbr, 1k tbn, 1k tbc (default)
    Metadata:
      DURATION        : 00:05:40.240000000
  Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default)
    Metadata:
      DURATION        : 00:05:40.301000000
Streamcopy requested for output stream 0:0, which is fed from a complex filtergraph. Filtering and streamcopy cannot be used together.

Note the last line, "Filtering and streamcopy cannot be used together"

[suntong]

Seg operation OK:

$ ffcvt -force -f "$FFCVT_FTC" -t copy -Seg 00:01:20

== Transcoding: Nice_scenic_videos_from_dashcam_With_Evening_sunset_view.mp4
] ffmpeg -i Nice_scenic_videos_from_dashcam_With_Evening_sunset_view.mp4 -c:v copy -c:a copy -b:a 64k -c:s copy -y -f segment -segment_time 00:01:20 -reset_timestamps 1 Nice_scenic_videos_from_dashcam_With_Evening_sunset_view%02d_.mkv

Done.
Org Size: 9765 KB
New Size: 3516 KB
Saved:    63% with 6249 KB
Time: 239.342112ms at 2022-01-02 13:40:33


Transcoding completed in 239.512566ms
Org Size: 9 MB
New Size: 3 MB
Saved:    63%

$ ls -l
 Nice_scenic_videos_from_dashcam_With_Evening_sunset_view00_.mkv*
 Nice_scenic_videos_from_dashcam_With_Evening_sunset_view01_.mkv*
 Nice_scenic_videos_from_dashcam_With_Evening_sunset_view02_.mkv*