Video Splitter

If you are not contracting out video editing, you are going to need to split out talk videos from the original unedited raw (long) footage.

This simple Perl script does exactly that, and a little bit more. This script requires ffmpeg

Usage

perl ./video-split.pl <source file> <config file>

Config File

The config file is in JSON format, and contains an object.

Top Level Parameters

audio

Default audio settings.

clips

Specifies the clip specifications.

Clip Parameters

filename

The name of the output file.

start

Timestamp since the beginning of the source movie to start extracting contents out from. Format should be in hh:mm:ss

end

Same as start, but denotes the end of the extraction. Format should be in hh:mm:ss

cropblur

Specifies a section of the video that should be blurred out. This often happens when the speaker has material that can be shared for an audience but not online, or maybe there was a single slide that just needed to be edited out.

The cropblur attribute is also an object. Here are the possible keys:

key	required	notes
x	YES	x offset of topleft corner to start the blur
y	YES	y offset of topleft corner to start the blur
width	YES	width of the rectangle to blur
height	YES	height of the rectangle to blur
between	NO	an array containing "start" and "end" timestamps. This can control when in the timeline the blur is applied to

The cropblur currently only supports one specification per output file, but this probably needs to be changed in the future. Please submit a PR.

Here's a sample, used in the very first builderscon tokyo 2016:

{
  "audio": "highpass=f=10, lowpass=f=2500, equalizer=f=280:width_type=h:w=100:g=5, volume=10dB",
  "clips": [
    {
      "filename": "A_1000_lestrrat.mov",
      "start": "00:46:38",
      "end": "00:54:09"
    },
    {
      "filename": "A_1010_mattn.mov",
      "start": "00:56:35",
      "end": "01:48:44",
      "audio": "highpass=f=5, lowpass=f=2500, equalizer=f=500:width_type=h:w=400:g=10, volume=10dB"
    },
    {
      "filename": "A_1120_uzulla.mov",
      "start": "02:06:41",
      "end": "03:19:00"
    },
    {
      "filename": "A_1310_miyake_youichiro.mov",
      "start": "03:56:54",
      "end": "04:05:00",
      "_end": "04:57:44",
      "cropblur": {
        "width": 840,
        "height": 640,
        "x": 120,
        "y": 75,
        "between": [
          {
            "start": "00:05:10",
            "end": "00:05:52"
          },
          {
            "start": "00:07:28",
            "end": "00:07:57"
          },
          {
            "start": "00:24:28",
            "end": "00:25:06"
          },
          {
            "start": "00:25:11",
            "end": "00:26:59"
          },
          {
            "start": "00:39:36",
            "end": "00:39:55"
          },
          {
            "start": "00:39:59",
            "end": "00:40:17"
          },
          {
            "start": "00:40:22",
            "end": "00:40:41"
          },
          {
            "start": "00:58:59",
            "end": "00:59:15"
          },
          {
            "start": "00:59:20",
            "end": "01:00:35"
          }
        ]
      }
    },
    {
      "filename": "A_1420_mumoshu.mov",
      "start": "05:06:40",
      "end": "06:07:11",
      "audio": "highpass=f=1, lowpass=f=2500, equalizer=f=300:width_type=h:w=300:g=10, volume=10dB"
    },
    {
      "filename": "A_1530_kazsato.mov",
      "start": "06:16:37",
      "end": "06:46:31"
    },
    {
      "filename": "A_1600_shibayu.mov",
      "start": "06:48:09",
      "end": "07:18:32"
    },
    {
      "filename": "A_1640_cho45.mov",
      "start": "07:27:44",
      "end": "08:26:48",
      "audio": "highpass=f=1, lowpass=f=2500, equalizer=f=300:width_type=h:w=300:g=10, volume=10dB"
    }
  ]
}